WQARF Report, Superfund Programs Section · 2003-09-30 · Water, soil, air and soil gas samples...

Arizona Department of Environmental Quality 2000 Annual Report Appendix III, 17

WQARF Report, Superfund Programs SectionA.R.S. § 49-282.G

ADEQ’s Superfund Programs Section, under both state and federal authorities, iden-tifies, assesses, and cleans up soil and groundwater that is contaminated with haz-ardous substances. The program, in consultation with the Water Quality AssuranceRevolving Fund (WQARF) Advisory Board, directs remediation activities using stateand federal funds, and oversees privately-funded cleanup efforts. Responsible partiesare identified and notified, and legal and technical evidence is gathered for recoveryof ADEQ’s costs and for enforcement of cleanup requirements.Funding is provided to the Arizona Attorney General’s Office, theArizona Department of Health Services, the Arizona Departmentof Water Resources and political subdivisions created to assistADEQ with remediation efforts.

The program also oversees the WQARF, which was created underthe Arizona Environmental Quality Act of 1986 to support cleanupefforts in the state. The fund depends on direct transfer of fundsfrom legislative appropriations, corporate income tax, cost recoveryand special fees.

In April 1998, a Registry was created to replace the Priority List, asrequired by A.R.S. § 49-287.01. Sites are added as they completethe Registry listing process, which includes scoring, notifying own-ers and operators within the site and providing the public with a30-day comment period.

As of the end of FY 2000, the WQARF Registry contained 33 sites.The program also oversees 10 projects that are governed and fund-ed by the federal Comprehensive Environmental Response, Com-pensation and Liability Act of 1980 (CERCLA), commonly known as Superfund.Sites posing a significant threat to human health and the environment may be placedon the National Priorities List (NPL). Three of these sites are under Department ofDefense jurisdiction. In addition to the WQARF Registry and NPL sites, the pro-gram also manages seven non-NPL Department of Defense sites.

The WQARF Program also provides fiscal support to the Voluntary RemediationProgram, which presently manages clean up activities at 48 sites.

The development of numerous rules, policies and guidance to address site investiga-tion and cleanup process has also been required by statute. The Superfund ProgramsSection devotes significant resources to the development of these documents in con-junction with the WQARF Advisory Board and other interested stakeholders.

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Arizona Department of Environmental Quality 2000 Annual ReportAppendix III, 18

Annual Program Performance Measures§ 49-282.G.1Accomplishments from expenditures of the fund in terms of reduction of con-tamination in the environment and actions taken to determine the natureand extent of contamination.§ 49-282.G.2

Table III.10. WQARF Remedial Activities Completed

Sites added to the WQARF Registry 6Site visits or inspections conducted 162Soil vapor extraction/injection wells installed 12Groundwater monitor wells installed1 53Water, soil, air and soil gas samples collected2 5,157Pounds of hazardous substances removed 4,160,697Billions of gallons of water treated 2.33Significant early response actions or final

cleanup actions with construction complete 3

1 The number of well installations represents a combined amount for ADEQ and the inter-ested parties.

2 The number of soil, soil gas, air or water samples collected represents a combined amountfor ADEQ and the interested parties.

Table III.11. WQARF Enforcement and Administrative Activi-ties Completed

Access agreements completed 26Consent decrees/consent orders completed 4Prospective purchaser agreements completed 2Qualified business settlements completed1 7Potentially responsible party searches underway 12Applicable or relevant and appropriate

1 ADEQ settled with seven responsible parties, resulting in six court actions. In some cases,the number of court actions is less than the number of settlements because severalresponsible parties may be covered under one settlement.

Table III.12. WQARF Community Involvement Activities Com-pleted

Public notices completed 31Factsheets completed 16Press releases completed 8Public meetings, hearings and open houses 46


§ 49-282.G.3The number of settlements made with responsible parties and the terms of each set-tlement.

During FY 2000, four Consent Decrees were entered with the court as settlementswith potentially liable parties in Phoenix and Tucson. WQARF received a total of$1,432,500. The four settlements include:

1. Gunning − $7,500 final settlement (South Mesa)2. City of Phoenix/Bank One − $250,000 plus $4.75 million worth of remedial

investigation work at the site; this settlement does not prohibit potential naturalresource damage claims (Estes Landfill)

3. SRP − $1.1 million; this settlement does not prohibit potential natural resourcedamage claims (Estes Landfill)

4. Sterling − $75,000 plus $15,000 worth of remedial investigation work (soil gassurvey) at the site (Broadway South Landfill)

ADEQ and responsible parties reaced sevenQualified Business Settlement settlements,which resulted in six court actions. In somecases, the number of court actions is lessthan the actual number of settlementsbecause several responsible parties may becovered under the same settlement.

§ 49-282.G.4Number and types of settlements under 49-292.01(Qualified Business) and 49-292.02 (FinancialHardship), as of the close of FY 2000.Number of applications submitted in each category

Qualified business 3Financial hardship 0

Number of applications denied under each sectionQualified business 0Financial hardship 0

Number of applicants who settled under the Quali-fied Business formula, and the amount of the set-tlements

Number settled 7 (These settlements includeseveral parties who applied in FY 99; these set-tlements resulted in six court actions.)Total amount of settlements $146,498.00

The number of settlements pursuant to 49-292.02and the total amount of the settlements

Number of applications and settlements 0

The number of persons who met the definition ofQualified Business under section 49-292.01 butwho settled pursuant to 49-292.02

Number of Applicants and settlements 0 (Noapplicants who settled under the financial hard-ship provisions of 49-292.02 met the definitionof a Qualified Business under 49-292.01.)


WQARF Registry SitesADEQ evaluates sites on the WQARF Registryand scores the sites partially on the type andlocation of contaminant(s), and the possibilityfor human exposure to the contaminant(s) pres-ent. The scores help determine relative risk atthe site, but do not necessarily indicate a directrisk to people or the environment. The maxi-mum score a site can receive is 120. The follow-ing 33 sites are on the WQARF Registry as ofthe end of FY 2000.

7th Street and Arizona AvenueSite Boundaries: The 7th Street and ArizonaAvenue site is located in downtown Tucson,approximately one-third mile north of Broad-way Boulevard and approximately three-fourthsmile east of Interstate 10. The site boundary isa northwest-trending oval extending approxi-mately 1,200 feet from the former Oliver’sCleaners facility at 300 E. Seventh Street(southeast corner of Seventh Street and FifthAvenue) to approximately 150 feet north ofSixth Street and approximately 100 feet east ofSeventh Avenue.

Contaminants: Tetrachloroethene (PCE),trichloroethene (TCE) and cis-1,2-dichloroethene (cis-1,2-DCE) at concentrationsexceeding the Arizona Aquifer Water QualityStandards contaminated groundwater in the7th Street and Arizona Avenue site.

Public Health Impact: The site contaminationhas not affected any drinking water wells. Thenearest drinking water wells are located one-half to one mile northeast of the site at theUniversity of Arizona.

Community Involvement Activities: The com-munity involvement process will begin whenADEQ initiates a remedial investigation at thesite.

Site Status: ADEQ placed the site on theWQARF Registry in April 2000 with a score of

40 out of a possible 120.

16th Street and CamelbackSite Boundaries: The 16th Street and Camel-back site is bounded approximately by MedlockDrive to the north, 17th Street to the east,Pierson Street to the south and 14th Place tothe west.

Contaminants: Investigations revealed soil con-taminated with total petroleum hydrocarbons(TPH) and groundwater contaminated withtetrachloroethene (PCE), dichloroethane (1,2,DCA) and benzene, about five to 10 feet belowthe surface.

Public Health Impact: No one is known to be atrisk of exposure to these contaminants. Thecontaminated groundwater is not used fordrinking water purposes.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet inJune 2000 to all residences and businesses with-in the community involvement area to updatethem on site activities.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in April 1999 with ascore of 23 out of a possible 120.

20th Street and Factor AvenueSite Boundaries: The 20th Street and FactorAvenue site is located approximately one-halfmile south of 16th Street (U.S. Highway 95)and approximately three-quarters of a mile eastof Fourth Avenue (Interstate 8 Business Loop)in Yuma. The site boundary is a northwest-trending oval extending approximately 1,000feet from the Houston International facility at655 E. 20th Street on the southeast to 19thStreet and Rail Avenue on the northwest.

Contaminants: Tetrachloroethene (PCE) con-taminates the site groundwater.

Sites Managed by the Superfund Programs Section


Public Health Impact: No irrigation, drinkingwater or other production wells are affected bythe PCE contamination from the site. PCE ispresent in monitoring wells at concentrationsabove the Aquifer Water Quality Standards.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in March 2000 with ascore of 31 out of a possible 120.

Broadway-PantanoSite Boundaries: The Broadway-Pantano site islocated in east-central Tucson. The site isbounded approximately by Speedway Boulevardto the north, Pantano Wash to the east, Broad-way Boulevard to the south and Wilmot Roadto the west. The site consists of the closedBroadway North Municipal Landfill and associ-ated groundwater contamination emanatingfrom the landfill.

Contaminants: Groundwater at this site con-tains tetrachloroethene (PCE), trichloroethyl-ene (TCE) and vinyl chloride at concentrationsexceeding drinking water standards. PCE andTCE are volatile solvents commonly used in drycleaning and metal cleaning operations, andvinyl chloride is often an end product whenPCE and TCE chemically decompose in theenvironment.

Public Health Impact: Since the contaminatedgroundwater is 325 feet below the ground sur-face, there is no risk of exposure for people liv-ing or working above the groundwater contami-nation. Tucson Water shut down four wells atthe site. St. Joseph’s Hospital’s well, which wasalso affected, has a wellhead treatment systemto remove the contaminants to non-detectablelevels.

Community Involvement Activities: ADEQ

established the Community Advisory Board(CAB) in November 1999. The CAB holdsmeetings on a regular basis.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in September 1998 with ascore of 48 out of a possible 120. ADEQ re-evaluated the on July 6, 1999 and raised thescore from 48 to 57.

The city of Tucson and Pima County installed asoil vapor extraction (SVE) system to removecontaminant gases which are dissolving into thegroundwater. The system consists of six extrac-tion wells located around the perimeter of thesite, one injection well located in the center ofthe northern half of the landfill and one injec-tion well located in the center of the southernhalf of the landfill. The SVE system began oper-ation in June 2000 and is designed to operatefor three years.

During the past year, the city and county devel-oped a conceptual plan for an interim ground-water containment system to prevent, to theextent possible, further migration of thegroundwater contamination within the city’scentral well field. The city and county will sub-mit the plan to ADEQ August or September2000, at which time it will also be available tothe public.

The city and county are currently completingthe remedial investigation for the groundwaterand plan to submit the remedial investigationreport to ADEQ in October 2000.

Central and CamelbackSite Boundaries: The site is a bounded approxi-mately by Missouri Avenue to the north,approximately 100 feet east of Central Avenueto the east, Pierson Street to the south and by aline approximately 600 feet west of CentralAvenue to the west.

Contaminants: The groundwater beneath thissite is contaminated with tetrachloroethene


(PCE), a common dry cleaning solvent. Severaldry cleaners have operated at the site. Ground-water and the dissolved PCE contamination isfound at approximately 45 feet below theground surface, as detected in several nearbymonitoring wells.

Public Health Impact: There is no known pub-lic health impact to drinking water becausethere are no drinking water wells within siteboundaries. There is an irrigation supply wellapproximately one-half mile down-gradient thatshows PCE at its depth of 400 feet.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet inJune 2000 to all residences and businesses with-in the community involvement area to updatethem on site activities. A Community AdvisoryBoard will be formed by October 2000.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in January 1999 with anEligibility and Evaluation (E&E) score of 31 outof a possible 120. ADEQ engaged a contractorto conduct an Early Response Action (ERA) atthis site for remediation and to control contam-ination from migrating into an undergroundparking garage across Central Avenue. ADEQis not currently conducting a remedial investi-gation/FS of the entire groundwater contami-nated plume, but intends to conduct suchactivities in the future.

East Central Phoenix (ECP) 24th Street andGrand CanalSite Boundaries: The boundaries of the 24thStreet and Grand Canal site approximate a cir-cle about 400 feet in diameter. The actual cen-ter of the circle is approximately 30 feet to theeast of 24th Street and 10 feet to the north ofthe Grand Canal.

Contaminants: ADEQ plans to investigate thissite due to the presence of tetrachloroethene(PCE) in the groundwater beneath the site. Theplume is small, appears to be stable and not

moving.

Public Health Impact: There is currently noknown threat of direct exposure to the publicfrom the contamination at the East CentralPhoenix sites.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in May 2000 with a scoreof 29 out of a possible 120.

ECP 32nd Street and Indian School RoadSite Boundaries: The boundaries of the 32ndStreet and Indian School Road site approximatea circle about 400 feet in diameter. The actualcenter of the circle is approximately 300 feet tothe east of 32nd Street and 100 feet to thesouth of Indian School Road.

Contaminants: ADEQ plans to investigate thissite due to the presence of tetrachloroethene(PCE) in the groundwater beneath the site. Theplume is small, appears to be stable and notmoving.




ECP 38th Street and Indian School RoadSite Boundaries: The 38th Street and IndianSchool Road site is bounded approximately by


Indian School Road to the north, 38th Street tothe east, Amelia Avenue to the south and 36thStreet to the west.

Contaminants: ADEQ plans to investigate thissite due to the presence of tetrachloroethene(PCE) in the groundwater beneath the site.Contamination is present in the groundwater atdepths between approximately 20-35 feet belowthe ground. The plume is small, appears to bestable and not moving. Public Health Impact: There is currently noknown threat of direct exposure to the publicfrom the contamination at the East CentralPhoenix sites.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in 1998 with a score of20 out of a possible 120.

ECP 40th Street and Indian School RoadSite Boundaries: The 40th Street and IndianSchool Road site is bounded approximately asfollows: a diagonal starting near the intersectionof 38th Street and Monterosa Street and endingnear the intersection of 40th Street and Devon-shire Avenue to the north, 40th Street to theeast, a diagonal starting near the intersection of38th Street and Piccadilly Road and endingnortheast of the intersection of 40th Street andIndian School Road to the south and 38thStreet to the west.

Contaminants: ADEQ plans to investigate thissite due to the presence of tetrachloroethene(PCE) in the groundwater beneath the site.Contamination is present in the groundwater atdepths between approximately 20-35 feet belowthe ground. The plume is small, appears to bestable and not moving.

Public Health Impact: There is currently no

known threat of direct exposure to the publicfrom the contamination at the East CentralPhoenix sites.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in 1998 with a score of20 out of a possible 120.

ECP 40th Street and Osborn RoadSite Boundaries: The boundaries of the 40thStreet and Osborn Road site approximate a cir-cle about 800 feet in diameter. The actual cen-ter of the circle is approximately 400 feet to thewest of 40th Street and 50 feet to the south ofOsborn Road.

Contaminants: ADEQ plans to investigate thissite due to the presence of tetrachloroethene(PCE) in the groundwater beneath the site. Theplume is small, appears to be stable and notmoving.




ECP 48th Street and Indian School RoadSite Boundaries: The 48th Street and IndianSchool Road site is bounded approximately by aline 450 feet north of Indian School Road tothe north, a line 300 feet west of 48th Street tothe east, a line 150 feet south of Indian School


Road to the south and 45th Place to the west.

Contaminants: ADEQ has investigated this sitedue to the presence of tetrachloroethene (PCE)in the groundwater beneath the site. The plumeis small, appears to be stable and not moving.

Public Health Impact: There is a nearby SRPirrigation well that SRP has stopped usingbecause use of the well may pull contaminationfrom this plume into the SRP well. ADEQ hasnegotiated an agreement with SRP to investi-gate the potential connection between theirwell and the plume.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in April 1999 with ascore of 27 out of a possible 120. ADEQ com-pleted a site investigation and indicated apotential connection may develop when theSRP well is operated. ADEQ is negotiating anexpanded agreement with SRP to develop asource control remedy.

East Washington FluffSite Boundaries: The East Washington Fluff siteis bounded approximately to the north by Buck-eye Road, to the east by 5th Street, to the southby Pima Street and to the west by a set of rail-road tracks.

Contaminants: The site is 12 acres in size andcontains significant quantities of auto shredderfluff co-mingled with native soils. Contaminantsknown to exist at the site are lead and poly-chlorinated biphenyls (PCBs), a substance his-torically used as a cooling oil in electric compo-nents.

Public Health Impact: A ten-foot fence wasinstalled by ADEQ around the site with signagein English and Spanish to warn the public that

hazardous substances are present at the site.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in June 1999 with a scoreof 22 out of a possible 120.

El Camino del Cerro Site Boundaries: The El Camino del Cerro siteis located in northwest Tucson and is boundedapproximately by the Rillito River on the north,Shannon Road on the east, El Camino delCerro Road on the south and the Santa CruzRiver on the west. The closed El Camino delCerro Landfill occupies approximately 20 acresof land in the southwest portion of the site area,north of El Camino del Cerro road between theSanta Cruz River and I-10.

Contaminants: The primary contaminants ofconcern at the site include tetrachloroethene(PCE), trichloroethene (TCE), vinyl chloride,benzene and methane. Volatile organic com-pounds (VOCs) concentrations overall appearto be steadily decreasing throughout the site.

Public Health Impact: Many of the private wellsalong Highway Drive were impacted by thecontamination. In April of 1987, Pima Countybegan supplying bottled water to businessesalong I-10, and in late 1989, Pima County pur-chased the private wells and connected theproperties to the municipal water system. Sinceno one is known to be drinking contaminatedwater, no one is known to be at risk of exposureto the groundwater contaminants.

The Arizona Department of Health Services(ADHS) has conducted a preliminary riskassessment to address potential and/or currentexposure to chemicals in groundwater and soilat the site. The preliminary risk assessment hasbeen used to guide the investigation at the site


as well as help determine if a health-effectsstudy in the area is warranted.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet to allresidences and businesses within the communi-ty involvement area. ADEQ has formed a Com-munity Advisory Board for the site with theShannon Road-Rillito Creek Site.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in August 1998 with ascore of 71 out of a possible 120.

Pima County Solid Waste Division has complet-ed investigations of the groundwater and land-fill at the site. Remedial investigations of thegroundwater are ongoing. ADEQ has conduct-ed investigations in the area including soil gassurveys and a soil removal action along High-way Drive.

A Landfill Gas Extraction Pilot Test was per-formed in September 1996. The extraction sys-tem was designed to utilize a series of gasextraction wells that remove landfill gasses to aflare where they are burned off. In 1999, thecounty conducted a biofilter system pilot test asan alternative to the flare. The biofilter systemis currently in use. Between 20 and 40 poundsof VOCs are removed each week with this sys-tem.

ADEQ has completed the review of the feasibil-ity study documents and agrees with thecleanup methods proposed for the site. Negotia-tions are in progress regarding the county’srequest for an early settlement agreement.

Estes LandfillSite Boundaries: The Estes Landfill site isbounded approximately by the Salt River to thenorth, the 153 Expressway to the east, Magno-lia Street to the south and 40th Street to thewest. Groundwater contamination from thelandfill extends in an oval shape for approxi-mately one-half mile to the west and north of

the landfill.

Contaminants: Compounds of interest for thesoil are arsenic, lead and thallium. Compoundsof interest for groundwater are vinyl chloride;trans-1,2-dichloroethene (DCE); cis-1,2-DCE;trichloroethene (TCE); 1,2-dichlorobenzene(DCB); chlorobenzene; 1,1-DCE; 1,4-DCB;tetrachloroethene (also known as PCE orPERK); benzene; 1,2-dichloroethane; chloro-form; bis (2-ethylhexyl)phthalate; arsenic; bari-um; chromium; cadmium; lead; manganese; andnitrate as N. The historically unregulated land-fill is reported to have accepted industrial, com-mercial, residential and liquid wastes.

Public Health Impact: Although the groundwa-ter beneath the landfill is contaminated, thereare no known drinking water wells within thearea of contamination.

Community Involvement Activities: SuperfundPrograms Section mailed a factsheet to all ofthe residences and businesses within the com-munity involvement area in December 1999,which provided an update on site activities andan opportunity to apply to the CommunityAdvisory Board (CAB). ADEQ selected CABmembers in February 2000, and the board hasmet several times.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in April 1998 with ascore of 45 out of a possible 120. The finalremedial investigation was completed by anADEQ contractor on July 30, 1999. It is antici-pated that the feasibility study report will becompleted by January 2001. A tentative com-pletion time frame for a record of decision(ROD) for this site has been set for December2001. In December 1999, ADEQ mailed sixty-one request for information letters to facilitiesaround the valley. The intent of the letters wasto obtain information on any potential disposalof hazardous substances at the landfill while itwas in operation. Additionally, thirteen requestfor information letters were mailed in February


2000 to other facilities identified as possiblyhaving information related to disposal of haz-ardous substances at the site. Since February,ADEQ has mailed more than 400 request forinformation letters.

Klondyke TailingsSite Boundaries: The Klondyke Tailings site, inthe unincorporated community of Klondyke, ison the north bank of Aravaipa Creek, approxi-mately 4.5 miles upstream of the AravaipaCanyon Wilderness Area. The boundaries ofthis site are irregular. The site is comprised oftwo piles of mine tailings, the soil between andadjacent to these piles, and the area approxi-mately 50 feet into the stream bed of AravaipaCreek, directly adjacent to the tailings piles.The site is bounded to the east by KlondykeRoad.

Contaminants: The contaminants present arevarious metals left in the tailings following pro-cessing for lead, zinc and copper recovery. Themetals present at levels higher than regulatorystandards include lead, cadmium, antimony,beryllium, copper, manganese and arsenic. Phys-ical evidence and testing of the groundwaterand soil in the area indicate that runoff andleaching into Aravaipa Creek from the tailingspiles may be occurring and flooding of the creekcould erode contaminated materials into thecreek bed.

Public Health Impact: Under a cooperativeagreement with the Agency for Toxic Sub-stances and Disease Registry, the ArizonaDepartment of Health Services conducted apublic health assessment of the Klondyke Tail-ings site. The results of the public health assess-ment suggest that the site does not pose ahealth risk to nearby residents, campers, swim-mers, or ATV users, nor to those who consumefish from Aravaipa Creek.

Community Involvement Activities: SuperfundPrograms Section mailed a factsheet to all ofthe residences and businesses within the com-

munity involvement area in April 2000, whichprovided an update on site activities and anopportunity to sit on the Community AdvisoryBoard (CAB). ADEQ has formed a CAB forthe site.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in September 1998 with ascore of 69 out of a possible 120. ADEQ isinvestigating this site in order to effectively pro-tect the water and natural resources in the area.ADEQ has hired a contractor to do the remedi-al investigation and feasibility study to furthercharacterize the extent of contamination at thesite. Preliminary soil sampling has been con-ducted for bioavailability testing. The results ofthat testing indicate a wide range of bioavail-ability for lead-contaminated soils and tailings,and a low level bioavailability for arsenic in soilsand tailings.

Los Reales LandfillSite Boundaries: The Los Reales Landfill site isbounded approximately by Valencia Road onthe north, Craycroft Road on the east, approxi-mately one-quarter mile south of Los RealesRoad on the south and Alvernon Way on thewest. Within the site boundary is the Los RealesLandfill, an active municipal solid waste landfilllocated at 5300 East Los Reales Road consistingof approximately 376 acres in southeast Tucson.

Contaminants: The impact to the environmentat this site is the contamination of groundwaterby volatile organic compounds (VOCs). ADEQhas detected several VOCs in two down-gradi-ent monitor wells including: tetrachloroethene(PCE), trichloroethene (TCE), trichlorofluo-romethane, dichlorofluoromethane,chloroethane, 1,1-dichloroethene (DCE),methylene chloride and 1,1-dichloroethane(DCA). PCE and TCE concentrations haveexceeded drinking water maximum contami-nant levels (MCL).

Public Health Impact: The Risk Assessment forthe site was finalized by ADHS in March 1994.


Results from the assessment indicate that,because contaminated water from the area isnot currently being used for drinking water, nosignificant health risks associated with this siteexist.

Community Involvement Activities: The com-munity involvement process outlined in theapproved remedial action plan will continue atthe site.


On March 10, 1999, the city of Tucson imple-mented a groundwater pump and treat remedia-tion system. As of April 2000, the extractionwells were pumping approximately five gallonsper minute per well. The city is currentlyfocused on completing the remedial action(plume containment) by the end of the calen-dar year 2000.

In April 1999 and February 2000, the city iden-tified further contamination south and east ofthe existing plume while drilling new monitorwells. Remaining work will include plume char-acterization, modeling and modifications to thepump and treat system to confirm plume con-tainment as prescribed by the remedial actionplan (RAP).

Miracle MileSite Boundaries: The Miracle Mile site in Tuc-son is bounded approximately by Roger Roadon the north, Flowing Wells Road on the east,Prince Road on the south and Bottletree Laneon the west.

Contaminants: The predominant contaminantsof concern in groundwater are trichloroethene(TCE), tetrachloroethene (PCE), 1,1-dichloroethene (DCE) and methyl tertiary butylether (MTBE). ADEQ detected benzene andchromium in at least one well in the site abovethe Maximum Contaminant Levels (MCLs).

Public Health Impact: The Arizona Depart-ment of Health Services (ADHS) completed adraft Baseline Human Health Risk Assessmenton the Miracle Mile Interchange Area in Janu-ary 1995. ADEQ has identified no significanthealth risks associated with this site.

The Crescent Manor Mobile Home park wasswitched from a local supply well to FlowingWells Irrigation District water in December of1993, when sampling indicated that the waterexceeded the federal drinking water MCL forTCE. Following water quality sampling thatindicated no TCE contamination, CrescentManor returned to using its private well. ADEQis sampling the Crescent Manor well quarterly.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet toresidences and businesses in the communityinvolvement area in June 1999, which providedan update on site activities and an applicationfor the Community Advisory Board (CAB).ADEQ selected the CAB members in August1999, and the board meets on a regular basis.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in September 1998 with ascore of 62 out of a possible 120.

In the fall of 1983, groundwater beneath a trail-er park within the former Miracle Mile studyarea was found to be contaminated. ADEQbegan investigating the site by researchingpotential sources of the contamination. In1988, the investigation continued with testingof soil and groundwater. ADEQ collectedgroundwater data, performed facility inspectionsand re-issued questionnaires to knowledgeableparties. Research was done to determine his-toric land use activities and property ownership.Between 1990 and 1997, ADEQ installed 11monitor wells to investigate the contamination.ADEQ has begun the remedial investigationand feasibility study phase of the project. Thisinvolves fully determining the extent of the


groundwater contamination and consideringremediation or cleanup options.

Park-EuclidSite Boundaries: The Park-Euclid site is locatedin Tucson and is bounded approximately byBroadway Boulevard on the north, Santa RitaAvenue on the east, 14th Street on the southand Euclid Avenue on the west. The siteincludes facilities located at both 299 and 301South Park, where several companies have con-ducted laundry and dry-cleaning operationssince the late 1930s.

Contaminants: ADEQ detected groundwatercontamination from a combination of dieselproduct and volatile organic compounds(VOCs), including tetrachloroethene (PCE),trichloroethene (TCE) and 1,1 dichloroethene(1,1-DCE), at the site. Both PCE and TCEwere present in concentrations above AquiferWater Quality Standards (AWQS).

Public Health Impact: A preliminary risk assess-ment was completed by the Arizona Depart-ment of Health Services (ADHS) in March1995. There are no significant health risks asso-ciated with the site at this time.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet toresidences and businesses in the communityinvolvement area in December 1999, whichprovided an update on site activities and anopportunity to sit on the Community AdvisoryBoard (CAB). ADEQ selected CAB membersin February 2000, and the board meets regular-ly.


Mission Linen installed a soil vapor extraction(SVE) system beneath the facility at 301 SouthPark in spring 2000. The SVE system is current-ly operating.

The Environmental Protection Agency (EPA)initiated site assessment activities in the area inSeptember 1998 with the installation of two up-gradient shallow groundwater monitor wells. InFebruary 2000, EPA informally delegatedresponsibility for the site to ADEQ.

ADEQ initiated remedial investigations inOctober 1999. As part of these investigations,ADEQ began quarterly groundwater samplingof two University of Arizona (UA) water supplywells located down-gradient from the site inNovember 1999. Three groundwater monitorwells were also installed south of the UA MainCampus in January 2000 to monitor groundwa-ter conditions in this area. Groundwater sam-ples taken from these monitor wells in Januarydid not indicate the presence of contamination.In February 2000, quarterly sampling was initi-ated in the existing monitor wells in the imme-diate vicinity of the site. Remedial investiga-tions are expected to continue through Decem-ber 2000.

Payson PCESite Boundaries: The Payson PCE site is locatedin Payson and is bounded approximately byFrontier Street to the north, Beeline Highway(State Route 87) to the east, Aero Drive to thesouth and McLane Road to the west.

Contaminants: The primary contaminant ofconcern is tetrachloroethene (PCE), a solventcommonly used in dry-cleaning. The PCE ispresent in the groundwater below the site’sground surface.

Public Health Impact: ADEQ and the town ofPayson have taken precautions to prevent pub-lic exposure to the contamination. They havenot put the heavily contaminated municipalwells into production for public supply withoutadequate treatment. The Arizona Departmentof Health Services (ADHS) developed a “State-ment of Risk” to address the risks associatedwith consumption of water from contaminated


private wells in the area. The conclusions abouthealth risks from residential use of contaminat-ed private well water are considered tentative.In March 1997, the site boundaries wereexpanded to include additional private domesticwells located to the north and south of the site.Several of these wells were found to be contam-inated with PCE above the Maximum Contami-nant Level (MCL). ADEQ informed the ownersthat drinking the well water could be unhealth-ful, and that ADEQ would provide a temporarysupply of bottled water for the owners’ use untilthe owners could secure an alternative supply.Two wells, which are being used for commercialoperations in the area, exceed the MCL forPCE. These two wells continue to be used, butthe water is not used for human consumption.

Community Involvement Activities: ADEQestablished a Community Advisory Board(CAB) in June of 1998. The CAB providescommunity outreach and is involved in theplanning and execution of a yearly public openhouse at the expanded groundwater treatmentsystem.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in April of 1998 with ascore of 63 out of a possible 120. The 1990dis-covery of contamination in two unused munici-pal wells at 204 West Aero Drive caused theinitial investigations to begin at the site. ADEQinvestigated the situation and found that PCEaffected a number of private wells in the imme-diate vicinity. The private well owners wereinformed of the situation and elected to usebottled water for consumption, which is beingsupplied by ADEQ on an interim basis, ADEQevaluates while cleanup and supply alternatives.Continuing tests indicate that the PCE did notaffect the town of Payson’s municipal water sup-ply.

Construction of an interim groundwater treat-ment system was completed in September 1997.Construction of an expanded groundwatertreatment system was completed in October

1998. Both the interim and the expanded treat-ment systems are now operational, pumpingand treating approximately 300-400 thousandgallons of water a day, and delivering the cleanwater to the town of Payson’s municipal watersupply.

Pinal CreekSite Boundaries: The Pinal Creek site is locatedin the Globe-Miami area and has irregularboundaries. Within the southern portion of thesite, the boundary follows and includes theentire mine sites of Phelps Dodge Miami, Inc.(Phelps Dodge Miami Mine, formerly Inspira-tion Mine) and BHP Copper, Inc. (the MiamiMine, the Copper Cities Mine, the Old Domin-ion Mine and related properties, and the Soli-tude Tailings). The southern boundary followsthe southern margin of the flood plain ofBloody Tanks Wash through the town of Miamiand the community of Claypool, then turnssouth to include the BHP Solitude Tailings. Theboundary follows the eastern margin of theflood plain of Russell Gulch and Miami Washnorthward to the confluence with Pinal Creek.The boundary parallels both sides of upperPinal Creek to the city of Globe, including theOld Dominion Mine and related mine proper-ties in the Globe Hills. North of the confluenceof Miami Wash and Pinal Creek, the boundaryparallels Pinal Creek on both sides includingthe flood plain of Pinal Creek plus a marginapproximately 1000 feet wide surrounding theflood plain as far north as Inspiration Dam.North of Inspiration Dam, the boundary followsthe flood plain of Pinal Creek. The northernboundary terminates at the Salt River.

Contaminants: Numerous contaminants arepresent at the site in groundwater, surface waterand soils. The contaminants that are present atlevels above regulatory standards or abovebackground levels include aluminum, arsenic,beryllium, cobalt, cadmium, copper, fluoride,iron, lead, sulfate, manganese, nickel, zinc andsulfuric acid.


Public Health Impact: Direct exposure to thecontaminants could occur from the consump-tion of contaminated surface water or ground-water, or from the ingestion or inhalation ofcontaminated soil particles. Water provided bythe local water suppliers (the Arizona WaterCo., the city of Globe and others) comes fromthe deeper regional aquifer and meets bothstate and federal water quality standards.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet to allof the residences and businesses within thecommunity involvement area.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in October 1998 with ascore of 97 out of a possible 120.

An interim remedial action began in 1990. Thisconsists of groundwater extraction from thealluvial aquifer at four locations along PinalCreek-Miami Wash. This remedial action hasremoved approximately 27,000 tons of metalsand 121,000 tons of sulfate from the alluvialaquifer. ADEQ has implemented numeroussource control remedial actions at the site,including the draining of Webster Lake, EllisonPond and other impoundments. Since 1988,ADEQ has removed contaminated groundwaterfrom the alluvium of the buried channel ofWebster Gulch at the Phelps Dodge Miamiproperty.

Groundwater extraction in lower Pinal Creekbegan in October 1998. The Pinal Creek Grouphas replaced 61 private wells with new wells inthe deeper regional aquifer. The Pinal CreekGroup has entered into an agreement to pro-vide potable water to the Arizona Water Com-pany.

ADEQ and the Pinal Creek Group entered intoa settlement agreement in August 1997. Follow-ing implementation of some remedial investiga-tion work required by the consent decree, andapproval of the feasibility study, a final remedial

action plan will be developed that addresses allremedial actions required at the Site. The PinalCreek Group previously completed remedialinvestigations into the degree and extent ofcontamination, and human-health and ecologi-cal risk assessments, which ADEQ hasapproved.

In April 1998, ADEQ issued an administrativeconsent order requiring an expedited remedialaction in lower Pinal Creek to prevent furtherdegradation of water quality in the perennialportion of Pinal Creek. The order required theconstruction of a treatment plant in lower PinalCreek to treat contaminated groundwater tomeet the Arizona surface water quality stan-dards by December 1, 1999. The treatmentplant was completed in October 1999 andbegan treating contaminated groundwater inNovember 1999. Water removed and treated isdischarged back to Pinal Creek. Currently,numeric surface water quality standards arebeing met in Pinal Creek.

Shannon Road-Rillito CreekSite Boundaries: The Shannon Road-RillitoCreek site is located in northwest Tucson andextends approximately one-quarter mile to thenorth and south of Rillito Creek, and is bound-ed approximately by Meadowbrook Park to theeast and Peglar Wash Park to the west.

Contaminants: The only contaminant currentlyknown to be present at levels above the regula-tory level in the groundwater underlying thesite is tetrachloroethene (PCE).

In addition to PCE, ADEQ detected five othersubstances below regulatory levels in groundwa-ter at the Shannon-Rillito site. The substancesthat are currently below regulatory levels in thegroundwater at the site are 1,1-dichloroethane,1,1-dichloroethene, cis- 1,2-dichloroethene,dichlorodifluoromethane (Freon 12) andtrichloroethene (TCE).

Public Health Impact: Since no one is known to


be drinking contaminated water, no one isknown to be at risk of exposure to the contami-nants. A risk assessment will be completed priorto selection of a remedy for the site.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet to allof the residences and businesses within thecommunity involvement area. A CommunityAdvisory Board has been established at the site.


In 1993 volatile organic compounds (VOCs)were detected below regulatory standards in thecity of Tucson Z-6A water supply well and thiswell was shut down. In 1994 VOCs were alsodetected below regulatory standards in the Met-ropolitan Domestic Water Improvement Dis-trict (Metro Water) South Shannon well and inthe Acacia Gardens Mobile Home Park watersupply well. Metro Water redesignated theSouth Shannon well as a backup well and thewater drawn from it was blended with the waterfrom two other wells prior to distribution. InJune 1997, Metro Water completed the installa-tion of a wellhead treatment system for theSouth Shannon Well. In 1995, Acacia GardensMobile Home Park was connected to city ofTucson Water. In 1997, the owners of AcaciaGardens installed a wellhead treatment systemfor their well.

PCE concentrations in untreated city of TucsonZ-6A, Acacia Gardens and Metro Water SouthShannon well water exceed regulatory stan-dards. ADEQ has initiated a remedial investiga-tion of the site to focus on defining the origin,nature and extent of contamination at the site.

Silverbell Jail Annex LandfillSite Boundaries: The Silverbell Jail Annex sitelies between, but is not bounded by, SilverbellRoad on the west, Sweetwater Drive on thenorth, Interstate 10 on the east and Grant

Road/Ironwood Hill Drive on the south.

Contaminants: A groundwater contaminationplume consisting primarily of the solvents tetra-chloroethene (PCE) and trichloroethene (TCE)is present at the site. Other volatile organiccompounds (VOCs) routinely detected in sitemonitor wells include vinyl chloride, dichlorodi-fluoromethane, trichlorofluoromethane, methyl-ene chloride and cis-1,2 dichloroethene. Octo-ber 1999 groundwater quality data indicateconcentrations of PCE at 250 micrograms perliter ( g/L), TCE at 30.1 g/L and vinyl chlorideat 13.2 g/L.

Public Health Impact: The Arizona Depart-ment of Health Services (ADHS) completedthe draft health risk assessment for the MiracleMile site in 1993. The draft risk assessmentconcluded that exposure through ingestion,inhalation, or dermal contact to groundwatercontaining arsenic posed the greatest potentialrisk. Arsenic was not identified in any sample atconcentrations greater than the MaximumContaminant Level (MCL) or Health BasedGuidance Level (HBGL). However, ADHSdetermined there to be a high potential expo-sure risk due to the presence of arsenic andorganic chemicals in the groundwater.

The Tra-Tel Mobile Home Park supply wellshowed PCE concentrations of 4.4 g/L onNovember 22, 1999. The EPA MCL is five g/L.Distributed water to the individual mobilehomes is for non-drinking purposes such ascooking and showering. For drinking purposes,the Park has a filter attached to a fountain in acommon area. ADEQ has little information onthe filtering system and is unsure of the filter’seffectiveness for removing PCE. As the Tra-TelMobile Home Park is classified as a transientnon-community public drinking water supplysystem, it is regulated for total coliform, nitrateand nitrite only.

Community Involvement Activities: The com-munity involvement process outlined in teh


approved remedial action plan will continue atthe site.


The city of Tucson completed an interim finalRemedial Action Plan for the Silverbell JailAnnex Landfill. The plan consisted of contain-ment and contaminant mass reduction with apump and treat system which would extractgroundwater from the aquifer and treat it by airstripping utilizing a carbon filter. Treated waterwould be reinjected into the aquifer and/orreused at Silverbell Golf Course.

In 1996, ADEQ approved the city’s request toconduct a trial study to evaluate the effective-ness of recirculation well technology at the siteto replace or enhance the approved pump andtreat system. The city completed the study andsubmitted their report to ADEQ in March1999. The city is currently deciding the effec-tiveness of utilizing such technology for ground-water remediation at the landfill. From Octoberto December 1999, the city removed 180pounds of volatile organic compounds ( VOCs)using a pilot soil vapor extraction (SVE) system.The system removed soil gas underneath thesouth cell at the landfill. The south cell con-tains high enough concentrations of the soil gasto be considered a continuing source of ground-water contamination.

South MesaSite Boundaries: The South Mesa site is bound-ed approximately by 10th Drive on the north,Stapely on the east and the railroad south ofBaseline on the south and west. The siteincludes industrial, commercial and residentialareas.

Contaminants: The primary contaminant ofconcern at the site is tetrachloroethene (PCE),a solvent, which is present in the groundwaterapproximately 110-130 feet beneath the

ground.

Public Health Impact: No drinking water wellsare threatened by this contamination plume.The nearest drinking water well is approximate-ly one-half mile from the down-gradient plumeedge. As part of the remedial action plan forinterim remediation of one of the two contami-nated SRP wells, a preliminary risk assessmentwas conducted.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet toresidences and businesses in the communityinvolvement area in April 2000. ADEQ willform a CAB for this site.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in August 1998 with ascore of 26 out of a possible 120. ADEQ imple-mented two early remedial response action proj-ects, which have significantly reduced the con-centration of PCE. The first early responseaction was a wellhead treatment system operat-ed from 1994 through 1996 by Salt River Pro-ject (SRP) on their well at the northeast cornerof Baseline Road and Mesa Drive. In 1996, theconcentration of PCE in the water pumpedbecame less than the concentration regulatedunder the National Pollutant Discharge Elimi-nation System (NPDES) and operation of thetreatment system was discontinued. The well ispumped for irrigation purposes, as needed.

The second early remedial response action wasa soil vapor extraction (SVE) system operatedat a facility about 500 feet south-southwest ofthe SRP well (up-gradient to the flow ofgroundwater). PCE was found in soil samplestaken at this facility. The SVE system was oper-ated for several months in 1996 and a signifi-cant amount of PCE was extracted. After sever-al months of no operation in 1997, the SVE sys-tem was restarted in 1997. However, after sev-eral weeks of operation only a slight amount ofPCE was extracted. This indicated that addi-tional SVE might not be cost effective. The


data collected to date are being reviewed todetermine the remaining actions necessary tocomplete the remedial investigation for the site.

Tonto and CherrySite Boundaries: The Tonto and Cherry site islocated in Payson, approximately 400 feet westof the Beeline Highway and immediately northof Main Street. The site boundary is a north-west-trending oval, extending approximately1,200 feet from the intersection of Main Streetand Colcord Avenue.

Contaminants: Tetrachloroethene (PCE) hasaffected groundwater at the site. ADEQ detect-ed PCE in five private drinking water wells atthe site.

Public Health Impact: The Maximum Contami-nant Level (MCL) for PCE is five microgramsper liter (g/l). The PCE concentrations in threeprivate wells at the site exceed this standard,and drinking water from these private wellsposes a threat to the public health. Bottleddrinking water is being provided to these pri-vate well owners on a temporary basis.

Community Involvement Activities: The Super-fund Programs Section will mail a factsheetcontaining a Community Advisory Board(CAB) application to all of the residences andbusinesses within the community involvementarea in August 2000. The CAB that ADEQestablished for the Payson PCE site will includethe Tonto and Cherry site.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in June 2000 with a scoreof 45 out of a possible 120.

Tyson WashSite Boundaries: The Tyson Wash site is bound-ed approximately by the groundwater plumewhich extends 300 feet to the north of CowellLane to the north, 400 feet east of WashingtonBoulevard to the east, 300 feet south of CowellLane to the south and 200 feet west of Oregon

Avenue to the west. The known groundwatercontamination exists northwest of the intersec-tion of State Hwy 95 and Business Route I-10in the town of Quartzsite, Arizona.

Contaminants: Tetrachloroethene (PCE), a sol-vent commonly used in dry cleaning, is presentin the groundwater approximately 40-70 feetbelow the ground.

Public Health Impact: The PCE contaminationcurrently appears to be limited to groundwaterin the upper aquifer located approximately 40to 70 feet below the land surface. This aquifer isused as a source of drinking water for the areawith approximately 40 drinking water wellswithin a one-quarter mile radius of the site.The lower aquifer, 525-560 feet below groundsurface, has shown no evidence of contamina-tion to date. Additionally, ADEQ attributes thehigh nitrate concentrations in groundwater inthe upper aquifer to historical sewage disposalpractices.

The town of Quartzsite, a public water provider,provides drinking water to some residents in theTyson Wash site. The town of Quartzsite desig-nated “phases” in which they will hook resi-dents up to the water system. Residents who arenot connected to the water system rely on pri-vate water wells to supply drinking water. Thereare 835 drinking water wells within a four mileradius of the site. The population during thewinter season ranges from approximately100,000 to 500,000 people (Bureau of LandManagement). The number of people servedper well ranges from approximately 25 to 2000people, based on an ADEQ Water Quality Divi-sion data report for active systems.

Community Involvement Activities: ADEQestablished a Community Advisory Board(CAB) in January 2000. The CAB meets regu-larly at the Quartzsite Library. ADEQ and LaPaz County held a public meeting in the townof Quartzsite on Sept. 25, 1996, to inform thecommunity about current drinking water and


groundwater issues, including ADEQ’s activitiesrelated to the Tyson Wash site. ADEQ staff par-ticipated in a public meeting in the town ofQuartzsite on Nov. 29, 1999, to discuss theremedial investigation and feasibility study forthe site which ADEQ initiated in March 2000.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in December 1998 with ascore of 46 out of a possible 120.

Vulture MillSite Boundaries: The Vulture Mill site is locatedjust east of North Tegner (Highways 89 and 93)about one mile northwest of the center of thetown of Wickenburg. The eastern boundary ofthe site is approximately one-quarter mile westof the Hassayampa River Channel. The site ison private land owned by four separate partiesand consists of a former gold-ore milling. Thetailings and affected soil are found in an areaabout 22 acres on up to four separate proper-ties.

Contaminants: The average concentration oflead in the mill tailings (5,000 parts per million(ppm)) exceeds the concentration allowed onresidential property (400 ppm) or non-residen-tial property (2,000 ppm). The highest concen-tration of lead in the tailings is reported to beapproximately 11,000 ppm.

Public Health Impact: Elevated levels of leadare found in the groundwater nearby, includingareas in which private wells are used for drink-ing water. ADEQ has tested the water frompotentially affected wells and found that prop-erly constructed wells show no lead in concen-trations known to be harmful to people. Thetown’s drinking water supply is regularly testedand is required by law to meet all state and fed-eral drinking water standards.

A human health risk assessment for the tail-ings/soils was completed in June 1999. Thisreport documents that the site in its currentcondition presents an unacceptable risk. A key

factor in this determination is the fact thatbioavailability tests on the tailings found thelead to be, on average, 68 percent bioavailable.

Community Involvement Activities: ADEQestablished a Community Advisory Board(CAB) for the site in August 1998. The projectmanager and the contractors completing inves-tigative work at the site provide the board withregular updates.


The Proposed Remedial Action Plan recom-mending the final remedy for the site was madeavailable for public comment in October 1998.In response to public comments, a humanhealth risk assessment was conducted. Theresults of the risk assessment, completed onJune 25, 1999, showed that the site poses anunacceptable risk and clean-up is appropriate.The Record of Decision (ROD) for this site wassigned on September 2, 1999. The ROD select-ed the cover alternative for the vadose zone(soil) portion of the final remedy and one yearof quarterly groundwater monitoring with a fol -low-up evaluation for the groundwater portionof the remedy. The 60 percent Design for the vadose zone por-tion of the final remedy was submitted toADEQ in May 2000 and is expected to be final-ized in November 2000. ADEQ is hiring a con-tractor to conduct quarterly groundwater moni-toring which is expected to begin by fall 2000.

WCP East Grand AvenueSite Boundaries: The East Grand Avenue site isbounded approximately by Whitton Avenue onthe north, 29th Avenue on the east, OsbornRoad on the south and 30th Avenue on thewest.

Contaminants: Contaminants known to bepresent in groundwater at levels above regulato-ry limits include the chlorinated solvents tetra-


chloroethene (PCE), trichloroethene (TCE),1,1-dichloroethene (1,1-DCE), 1,1-dichloroethane (1,1-DCA) and vinyl chloride.

Public Health Impact: To date, testing in theWCP area indicates almost no chance ofhuman contact with the contamination. Sam-pling shows that the contaminated soils areunder asphalt parking lots or asphalt-surfacedstorage areas, or under the concrete floors ofbuildings. ADEQ has shut down contaminateddrinking water wells in the area. ADEQ willconduct health risk assessments at sites whereremedial investigations and feasibility studiesare being conducted to evaluate potentialhealth risks.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet inApril 2000 to the residences and businesseswithin the community involvement area.ADEQ formed a Community Advisory Boardfor the site.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in April 1998 with ascore of 26 out of a possible 120. The site reme-dial investigation continues. During FY 2000,ADEQ installed eight groundwater monitoringwells and conducted four rounds of groundwa-ter sampling of all wells that are part of themonitoring network. Laboratory results for thefirst two rounds of groundwater sampling arecurrently being evaluated to determine thelocations of additional monitor wells. ADEQ isalso evaluating the on-site soil data obtainedfrom the soil investigation phase of the remedialinvestigation.

WCP West Grand AvenueSite Boundaries: The West Grand Avenue siteis bounded approximately by Osborn Road onthe north, 33rd Avenue on the east, Earll Driveon the south and 35th Avenue on the west.

Contaminants: Contaminants known to bepresent in groundwater at levels above regulato-

ry limits include the chlorinated solvents tetra-chloroethene (PCE), trichloroethene (TCE),1,1-dichloroethene (1,1-DCE), 1,1-dichloroethane (1,1-DCA) and vinyl chloride.

Public Health Impact: To date, testing in theWCP area indicates almost no chance ofhuman contact with the contamination. Sam-pling shows that the contaminated soils areunder asphalt parking lots or asphalt-surfacedstorage areas, or under the concrete floors ofbuildings. ADEQ shut down contaminateddrinking water wells in the area. ADEQ willconduct health risk assessments at sites whereremedial investigations and feasibility studiesare being conducted to evaluate potentialhealth risks.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in April 1998 with ascore of 17 out of a possible 120. ADEQ shutdown the interim remedy soil vapor extraction(SVE) system in May 1998. The SVE systemwill start up again in the near future to deter-mine if trichloroethylene (TCE) is again presentin soil vapors at the site. If TCE concentrationsremain minimal, ADEQ will consider the soilremediation complete and will shut down theSVE system.

WCP North PlumeSite Boundaries: The North Plume site isbounded approximately by Turney Avenue onthe north, 38th Avenue on the east, IndianSchool Road on the south and 43rd Avenue onthe west.




Public Health Impact: To date, testing in theWCP area indicates almost no chance ofhuman contact with the contamination. Sam-pling shows that the contaminated soils areunder asphalt parking lots or asphalt-surfacedstorage areas, or under the concrete floors ofbuildings. ADEQ shut down contaminateddrinking water wells in the area. ADEQ willconduct health risk assessments at sites whereremedial investigations and feasibility studiesare being conducted to evaluate potentialhealth risks.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in April 1998 with ascore of 50 out of a possible 120. The RemedialInvestigation continues. During FY 2000,ADEQ installed 18 groundwater monitoringwells. Through the installation of four angledsoil vapor extraction (SVE) wells and three soilvapor monitoring (SVM) wells, ADEQ hastaken initial steps to remediate the soil at theF&B facility. ADEQ also plans for a soilremoval action at the F&B facility to removePCE-contaminated soil beneath the vapordegreaser location in July 2000.

WCP North Canal PlumeSite Boundaries: The North Canal Plume site isbounded approximately by Indian School Roadon the north, 36th Avenue on the east, Claren-don Avenue on the south and 40th Avenue onthe west.

Contaminants: Contaminants known to bepresent in groundwater at levels above regulato-

ry limits include the chlorinated solvents tetra-chloroethene (PCE), trichloroethene (TCE),1,1-dichloroethene (1,1-DCE), 1,1-dichloroethane (1,1-DCA) and vinyl chloride.Public Health Impact: To date, testing in theWCP area indicates almost no chance ofhuman contact with the contamination. Sam-pling shows that the contaminated soils areunder asphalt parking lots or asphalt-surfacedstorage areas, or under the concrete floors ofbuildings. ADEQ has shut down contaminateddrinking water wells in the area. ADEQ willconduct health risk assessments at sites whereremedial investigations and feasibility studiesare being conducted to evaluate potentialhealth risks.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in June 1998 with a scoreof 22 out of a possible 120. In January 2000,ADEQ awarded a contract for the conduct ofan remedial investigation/FS at the WCP NorthCanal site. The remedial investigation fieldinvestigative activities (which include theinstallation of a minimum of eight monitorwells, soil sampling, geophysical testing, aquifertests, quarterly groundwater sampling andmonthly water level measurements) are expect-ed to be completed by September 2001.

WCP West Osborn Complex (WOC)Site Boundaries: The West Osborn Complexsite is bounded approximately by the GrandCanal on the north, 34th Drive on the east,Pinchot Avenue on the south and 39th Driveon the west.




Public Health Impact: To date, testing in theWCP area indicates almost no chance ofhuman contact with the contamination. Sam-pling shows that the contaminated soils areunder asphalt parking lots or asphalt-surfacedstorage areas, or under the concrete floors ofbuildings. ADEQ has shut down contaminateddrinking water wells in the area. ADEQ willconduct health risk assessments at sites whereremedial investigations and feasibility studiesare being conducted to evaluate potentialhealth risks.


Site Score and Status: ADEQ placed the site onthe WQARF Registry in 1998 with a score of47 out of a possible 120. ADEQ provides regu-latory oversight and technical review of investi-gations and site activities performed by UnitedIndustrial Corporation. The hydrologic systembeneath the site changed dramatically duringFY99 due to the concrete lining of the SRPGrand Canal. Water levels beneath the sitedropped approximately 20 feet. As a result ofthese changes, the Design for the InterimGroundwater Pump-and-Treat system approvedby ADEQ in FY98 became no longer feasiblenor appropriate. Contamination in the ground-water beneath the WOC facility becametrapped in the soil after the drop in the watertable.In FY99, the settling party conducting theremedial investigation/FS at the site proposedan alternative approach to interim remediation:soil vapor extraction (SVE). In FY99, the set-tling party developed a Design Plan for a SVEsystem. Three SVE wells were installed during

April 1999 and the SVE system began operatingAugust 1999. The settling party has agreed toinstall at least three groundwater monitoringwells to complete the remedial investigation.The remedial investigation and FS are expectedto be finalized during FY 01.

West Van BurenSite Boundaries: The West Van Buren site isbounded approximately by Van Buren Street onthe north, Seventh Avenue on the east, Buck-eye Road on the south and 83rd Avenue on thewest. In addition, a finger shaped plume existsbetween Seventh and 27th Avenues betweenBuckeye and Lower Buckeye Roads.

Contaminants: The groundwater contaminationplume consists primarily of the solvents tetra-chloroethene (PCE) and trichloroethene(TCE). The contamination is present in thegroundwater approximately 40 to 80 feet belowthe surface.

Public Health Impact: Groundwater in the areais not used for drinking water purposes. Theentire area is served by the city of Phoenixmunicipal water system or other regulated sys-tems. There should be no direct exposure topeople living or working in the area of the site.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet inNov. 1999 to the residences and businesseswithin the community involvement area 1999.ADEQ formed a Community Advisory Board,which meets regularly.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in April 1998 with ascore of 50 out of a possible 120. A groundwa-ter flow model for the area is under develop-ment. Water quality data are being collectedsemiannually. Water elevation information iscollected monthly from approximately 60 wells.An early response action is being designed forthe American Linen Supply Company site at720 West Buchanan. A soil vapor extraction


and air sparging early response action is in oper-ation at the Dolphin site at 740 S. 59thAvenue. Dolphin is planning to expand itsgroundwater monitoring network during FY2000. A soil investigation will be conducted byDolphin under the oversight of ADEQ’s Haz-ardous Waste program as a result of a settle-ment reached by ADEQ and the Attorney Gen-eral’s office with Dolphin on Jan. 13, 2000.

Western Avenue PlumeSite Boundaries: The Western Avenue Plumesite is bounded approximately by the groundwa-ter contamination plume which generallyextends from Hill Drive (north of WesternAvenue) to the north, Third Street to the east,approximately 1000 feet north of State Route85 to the south and the Phoenix-Goodyear Air-port to the west.

Contaminants: The principle contaminant atthe site is tetrachloroethene (PCE), a solventcommonly used in dry cleaning. The availabledata suggests that the PCE is currently limitedto the upper groundwater aquifer (Subunit A)which is approximately 60-110 feet belowground surface.Public Health Impact: Available data suggestthat the PCE contamination is currently limitedto Subunit A groundwater. Due to high nitrateconcentrations from historical agricultural landpractices, the Subunit A groundwater is usedmainly as an irrigation source.

Community Involvement Activities: The Super-fund Programs Section mailed a factsheet inApril 2000 to the residences and businesseswithin the community involvement area.

Site Score and Status: ADEQ placed the site onthe WQARF Registry in December 1998 with ascore of 51 out of a possible 120. PCE was firstdiscovered in the Phoenix-Goodyear Airport(PGA) South Federal Superfund Site monitor-ing wells in June 1993. The highest concentra-tions of PCE were detected in the wells up-gra-dient of PGA, which indicated that the source

of contamination could be near or up-gradientof the city of Goodyear Public Works Facility. In1995, two monitoring wells were installed todetermine the quality of groundwater east andnorth of the vicinity of the PGA South Super-fund site. ADEQ will install five additionalmonitoring wells by fall 2000 as part of an earlyresponse action. The data collected from thesewells will assist ADEQ in monitoring thecleanup of the PCE. The PCE cleanup is occur-ring by way of a nearby network of extractionwells and an air stripper at the Phoenix-Goodyear Airport. The treated water is reinject-ed down-gradient into the same aquifer. Aremedial investigation is planned for the sitewhen additional resources become available.

National Priorities List (NPL) Sites (FederalSuperfund)The National Priority List (NPL) is EPA’s list ofthe most serious uncontrolled or abandonedhazardous waste sites identified for possiblelong-term remedial response under Superfund.Inclusion of a site on the list is based primarilyon the score the site receives under the HazardRanking System. Money from Superfund can beused for cleanup only at sites that are on theNPL. EPA is required to update the NPL atleast once a year.

19th Avenue LandfillSite Boundaries: The 19th Avenue Landfill sitecovers approximately 213 acres and is locatedin Phoenix at the southeast corner of 19thAvenue and Lower Buckeye Road. Prior to itsuse as a landfill in the late-1950s, the site wasmined for sand and gravel. The gravel pits werelater filled with municipal waste from localindustries.

Contaminants: During the remedial investiga-tion, the groundwater was found to containvery low levels of volatile organic compounds(VOCs), heavy metals including arsenic, bari-um, mercury and nickel and beta radiation.Currently, the only compound that is abovedrinking water standards is 1,1-dichloroethene


(1,1-DCE). Sampling of soil and refuse in thelandfill indicated that the contents of the land-fill are similar to those expected in municipallandfills, however, industrial wastes were alsodisposed of at the site. During the remedialinvestigation, the most frequently detectedVOCs were ethyl benzene, 1,4-dichlorobenzene,xylenes and toluene.

Public Health Impact: The baseline risk/healthassessment prepared by the Agency for ToxicSubstances and Disease Registry indicates thatthe contaminated groundwater flowing under-neath the landfill is not considered to be athreat to public health. Groundwater in thearea is not used as drinking water. The nearestdrinking water supply well is over three milesaway. An industrial well and a down-gradientagricultural well are located 200 feet and 800feet, respectively, from the site; there is noknown contamination of these wells at thistime.

Community Involvement Activities: No com-munity involvement activities are planned atthis time.

Site Status: The site was placed on the EPANational Priority List in September 1983.ADEQ was assigned oversight authority of theproject in 1988. A Consent Decree entered inJune 1992 required capping of the landfill cells,removal and treatment of methane gas, moni-toring of groundwater, flood control improve-ments and bank stabilization, and a contingencyplan to treat groundwater if standards areexceeded. This project is in the operations andmaintenance phase. Quarterly groundwatermonitoring, monthly methane monitoring andinspections of the landfill cap, flood controlstructures and landscaping continue. By theend of September 2000, ADEQ and EPA willcomplete the five-year review for the site.

Apache PowderSite Boundaries: The Apache Powder Super-fund site is located in Cochise County, Arizona,

approximately seven miles southeast of theincorporated town of Benson and 2.5 milessouthwest of the unincorporated town of St.David. The site study area covers approximatelynine square miles and includes 945 acres ofland owned by Apache Nitrogen Products, Inc.(ANP), formerly known as the Apache PowderCompany. The San Pedro River bounds theeastern side of the site, running from the south-east corner of the property towards the north-west.

Contaminants: Contaminants of Concern(COCs) found at the Apache Powder siteinclude: arsenic, fluoride and nitrate in theperched groundwater; nitrate in the shallowgroundwater aquifer; arsenic, antimony, barium,beryllium, chromium, lead, manganese andnitrate in the inactive pond soils and sediments;as well as 2,4-DNT, 2,6-DNT and lead in WashArea 3. Soil contaminants include metals,nitrate-N, spent catalyst material (vanadiumpentoxide) and 2,4-dinitrotoluene (DNT).Additionally, ADEQ found the vanadium pen-toxide and TNT in soils on the site and per-chlorate in the perched and shallow aquifer.

Public Health Impact: Currently there are noknown human exposures to groundwater con-tamination at this site. In 1994 ANP replaced anumber of shallow aquifer domestic wells thathad nitrate contamination with deeper regionalaquifer wells. ADEQ has not detected perchlo-rate in any domestic wells.

Community Involvement Activities: EPArecently developed and distributed the follow-ing newsletters and factsheets: Status of ApacheCleanup Activities − May 1999, TNT RemovalAction Planned for December 1999 − November1999. EPA and ADEQ participated in a com-munity meeting in St. David, Ariz on Oct. 14,1999.

Site Status: The site was listed on the NationalPriorities List (NPL) on Aug. 30, 1990. ApacheNitrogen Products, Inc. (ANP) is conducting


CERCLA remedial design/remedial actionactivities under a unilateral administrativeorder issued by the EPA in December 1994.

The remedial investigation revealed nitrate-nitrogen (nitrate-N) contamination in perchedgroundwater exceeding 1000 parts per million(ppm) as well as concentrations up to 220 ppmin the San Pedro River. The federal drinkingwater standard for nitrate-N is ten ppm.

Groundwater samples were analyzed for per-chlorate at the site in November 1998. Thesesamples showed perchlorate contaminationranging up to 670 parts per billion (ppb) in theperched aquifer and 300 ppb in the shallowaquifer. More extensive sampling of the SanPedro River is planned to confirm that there areno perchlorate impacts. At this time, the per-chlorate contamination appears to be confinedto the southern area of the site. Although nei-ther EPA nor ADEQ have a drinking waterstandard for perchlorate, the Arizona Depart-ment of Health Services issued a Health BasedGuidance Level for perchlorate in drinkingwater of 14 ppb in May 2000.

EPA’s Record of Decision (ROD) for the siteissued in September 1994 addresses cleanup ofthe perched aquifer, the shallow aquifer andcontaminated soils currently being regulatedunder the CERCLA program. In addition,ADEQ has completed an EPA-mandatedRemoval Action for TNT-contaminated soils.DNT, vanadium pentoxide and arsenic contam-inated soils were also excavated and removed.

Construction of a Northern Area TreatmentWetland to treat nitrate-N contaminatedgroundwater in the northern portion of the sitewas completed in September 1997. The wetlandwas planted with aquatic vegetation and con-taminated water (high-nitrate-N groundwaterfrom the shallow alluvial aquifer) was added toestablish the vegetation. The wetland is in theestablishment phase.

Hassayampa LandfillSite Boundaries: The Hassayampa Landfill siteis located about ten miles west of Buckeye, Ari-zona and is approximately six miles east of thePalo Verde Nuclear Generating Station. Thesite consists of about ten acres used for histori-cal hazardous waste disposal which lies within a47-acre landfill. The industrial waste disposaloperations were independent of sanitary landfillactivities.

Contaminants: Contaminants of Concern(COCs) detected at Hassayampa Landfill whichexceeded the Federal Maximum ContaminationLevels (MCLs) for groundwater include: 1,1-dichloroethene; trichlorotrifuoroethane; 1,1,1-trichloroethane; 1,1-dichloroethane;trichloroethene; tetrachloroethene; trichloroflu-oromethane; 1,2-dichloroethene; 1,2-dichloro-propane; and toluene. Ambient air containsvery low levels of volatile organic compounds(VOCs). Groundwater sampling results alsoidentified various VOCs. Soils beneath thewaste pits contain VOCs, heavy metals, pesti-cides and lime wastes.

Public Health Impact: Risk assessment resultsindicate that potential health risks may exist forindividuals who ingest the contaminatedgroundwater or come into direct contact withhazardous wastes present in several of thetrenches.

Community Involvement Activities: The site islocated in a sparsely populated area. ADEQ dis-tributed a factsheet in December 1999 to resi-dents and commercial businesses in the vicinityof the site.

Site Status: Prior to 1977, the landfill permittedthe disposal of industrial wastes (predominantlyempty pesticide drums). When the 19thAvenue Landfill was closed by the city ofPhoenix, industrial waste was transported anddisposed of at the Hassayampa Landfill. TheHassayampa Landfill received industrial wasteunder this manifest system from approximately


February 1979 to October 1980. The site wasplaced on the National Priorities List (NPL) onJuly 22, 1987.

EPA and certain Respondents entered into anadministrative consent order in February 1988requiring the Respondents to conduct a remedi-al investigation and feasibility study. The reme-dial investigation and feasibility study werecompleted in 1991 and 1992, respectively. EPAselected remedial actions in the Record of Deci-sion (ROD), dated August 1992, which includ-ed groundwater extraction, treatment by airstripping and reinjection (began operation inMarch 1994), construction of a cap over thehazardous waste area to prevent direct contactwith contaminated waste and soil left in place(constructed in June 1994), a soil vapor extrac-tion system and treatment system with thermaloxidation to remove contaminants from thevadose zone in areas where waste and soil con-tamination is a threat to groundwater (beganoperation in July 1996), and access and deedrestrictions.

In September 1997, EPA certified that con-struction was complete by issuing a PreliminaryCloseout Report. The groundwater system con-tinues to operate. The soil vapor extraction sys-tem was turned off due to mechanical difficul-ties and dioxin emission concerns. Groundwateris monitored semi-annually, the soil vapor treat-ment system is monitored monthly, and the soilcap is inspected annually and after severe rainstorms for erosion.

Indian Bend Wash − NorthSite Boundaries: North Indian Bend Wash(NIBW) is the northern part of the area desig-nated by EPA as the Indian Bend Wash (IBW)Superfund Site. The approximate boundaries ofthe site are Chaparral Road to the north, PimaRoad to the east, Scottsdale Road to the westand just south of Curry Road to the south. Insome locations, groundwater contaminationextends beyond these boundaries, and thoselocations are considered part of the Superfund

site. The area consists primarily of residentialand commercial areas and developed open areassuch as parks.

Contaminants: In 1981, volatile organic com-pounds (VOCs) were discovered in area wells inconcentrations exceeding Arizona Departmentof Health Services action levels. VOCs wereused as degreasing agents and solvents at vari-ous industrial facilities located in the study area.

Public Health Impact: Groundwater at the siteis used to irrigate various crops and feed live-stock. In addition, contaminated groundwater isbeing treated to drinking water standards andsupplied to the city of Scottsdale’s municipalwater supply.

Community Involvement Activities: ADEQformed a Community Involvement Group,which meets regularly.

Site Status: The Indian Bend Wash site was list-ed on EPA’s National Priorities List in Septem-ber 1983. The majority of the clean-up activi-ties are being addressed by Motorola andSiemens Corporations, the Participating Com-panies (PCs). In the September 1988 Record ofDecision (ROD), EPA selected a remedy for theLower and Middle Alluvial Units of the ground-water. The Scottsdale Operable Unit (OU I)involves operation of a groundwater treatmentfacility located at Pima Park (Thomas Road and88th Street). The treated water is added toScottsdale’s public water distribution system. InSeptember 1991, EPA issued a ROD for Opera-ble Unit II (OU II), to address contaminationin the upper alluvial unit of groundwater andcontaminated soils. This ROD required soilvapor extraction systems at several source areas.

The OUI remedy failed to contain the loweralluvial unit groundwater plume. Hydrogeolgicdata indicated that the plume was migrating tothe north and would threaten the Paradise Val-ley well field. In 1994, the PCs in cooperationwith the Paradise Valley Water Company, con-


structed the Miller Road Treatment Facility atthe northern end of the groundwater plume.The OUI Consent Decree requires the PCs toconduct a feasibility study addendum (FSA) todetermine the effectiveness of the OUI remedyand to recommend a final remedy. Upon com-pletion of the FSA, approximately fall 2000,EPA will issue the proposed plan which willstate the selected final remedy for the site. Theproposed plan will announce a 30-day publiccomment period on the selected remedy. There-after, EPA will issue an amended record of deci-sion for OUI.

Indian Bend Wash − SouthSite Boundaries: The South Indian Bend Wash(SIBW) study area encompasses approximatelyfour square miles in Tempe. SIBW adjoins theten square mile area of North Indian BendWash. The site is primarily commercial/industri-al north of University Avenue and residential tothe south.

Contaminants: The groundwater in the SIBWarea is mainly contaminated with volatileorganic compounds (VOCs). Soil is contami-nated with VOCs, cyanides, acids and heavymetals including chromium and lead.

Public Health Impact: All drinking water supplywells in the site boundary are inactive. Ground-water in the area is used for industrial purposesonly. Drinking water is served by the city ofTempe municipal service from wells outside ofthe site boundaries.


Site Status: The Indian Bend Wash site was list-ed on EPA’s National Priorities List in Septem-ber 1983. EPA issued administrative orders tofive responsible parties within the site; soils andgroundwater investigations are ongoing at thesefacilities. EPA issued a Record of Decision(ROD), dated September 1993, for VOCs in

soil. This ROD requires a “plug-in” remedy ofsoil vapor extraction systems (SVE). EPA andADEQ are in the process of completing these“plug in” determinations. EPA issued a ROD forthe groundwater operable unit in September1998 for VOCs in groundwater. The groundwa-ter remedy requires monitored natural attenua-tion for the central and eastern portions of theplume and a groundwater extraction and treat-ment system for the western portion of theplume. On March 30, 1999, EPA issued anadministrative order to the potentially responsi-ble parties for the work outlined in the ground-water ROD.

Luke Air Force BaseSite Boundaries: Luke Air Force Base (LAFB) islocated 13 miles west of downtown Phoenix on4,198 acres. The base is bordered by NorthernAvenue on the north, Dysart Road on the east,Camelback Road on the south and Reems Roadand 159th Avenue on the west. The cities ofSun City, Sun City West and Litchfield Park arelocated northeast, north and south of the base,with the White Tank Mountains to the west.

Contaminants: Contaminants at the siteinclude organic solvents and paint strippers,waste oil spills, petroleum spills, metal platingwastes, hydraulic fluids and radiological wastes.Soil is contaminated with waste oils and volatileorganic compounds (VOCs) resulting from thediverse processes on the site. Groundwater ispotentially contaminated with waste oils andVOCs.

Public Health Impact: Currently, there is noindication of groundwater contamination.Potential human health hazards include acci-dental ingestion or direct contact with contami-nated materials. A base-wide risk assessmenthas shown that contaminants left in place willnot pose a risk to human health or the environ-ment.

Community Involvement Activities: LAFB hasan active Restoration Advisory Board (RAB).


Recently, the RAB was changed to a Communi-ty Advisory Board due to the anticipated Basede-listing from the National Priorities List.

Site Status: The EPA added LAFB to theNational Priorities List (NPL) in 1990. Thebase is divided into two operable units: (OU-1)is Luke Air Force Base site-wide final remedy,and (OU-2) includes remediation and investiga-tion of soils at eight sites. Two sites in OU-2required a remedy selection. One site usedbiodegradation for remediation of polyaromatichydrocarbons (PAHs) in the soil. The other siterequired a soil cap and cap maintenance. Onlytwo out of 25 sites in OU-1 require active reme-diation. Seven of the 25 sites have institutioncontrols as the selected remedy. The rest of thesites do not require remediation; a base-widerisk assessment has shown that contaminantsleft in place will not pose a risk to humanhealth or the environment. The two sites thatrequire active remediation are the Petroleum,Oil and Lubricants (POL) area and the old con-struction debris landfill adjacent to the skeetrange. The POL area was being remediated by asoil vapor extraction - internal combustionengine (SVE-ICE) system through November 2,1998. The skeet range is still active and leadshot that has migrated onto the landfill wasremediated in December 1999. The OU-1Record of Decision (ROD) was signed byADEQ on Aug. 16, 1999, the OU-2 ROD wassigned by ADEQ in January 1994. CurrentlyLAFB is in the process of being de-listed fromthe NPL. The Waterdog Recreation Annex, atApache Lake, was passed on to Luke Air ForceBase from the closed Williams AFB in order tocontinue the investigation and remediation ofthe area. Three new monitoring wells wereinstalled in July 1999.

Motorola 52nd StreetSite Boundaries: The Motorola 52nd Street siteis located in a residential and commercial areain the central and eastern parts of the city ofPhoenix. Major geographic features are thePapago Buttes to the east of the former Motoro-

la plant, the Salt River flowing westerly aboutone mile to the south, the Old Crosscut Canallocated along 46th Street and the Grand Canalwhich flows northwesterly through the areawest of 40th Street and Van Buren Street.Phoenix Sky Harbor Airport is located approxi-mately 1½ miles to the southwest. ADEQ hasdivided the site into three operable units. Theboundaries for Operable Unit 1 are 52nd Streetto the east, Palm Lane to the north, RooseveltStreet to the south and 46th Street to the west.The boundaries for Operable Unit 2 are Roo-sevelt Street to the north, 46th Street to theeast, Buckeye Road to the south and 14thStreet to the west. The approximate study areaof Operable Unit 3 is McDowell Road to thenorth, 14th Street to the east, Buckeye Road tothe south and Seventh Avenue to the west.

Contaminants: The major contaminant of con-cern is trichloroethene (TCE) contamination ofthe groundwater.

Public Health Impact: The site has not affectedany drinking water supply wells. Drinking wateris currently supplied by the city of Phoenix dis-tribution system from surface water located out-side of the site. The contaminated groundwaterin this area is not being used for drinking water.

Community Involvement Activities: EPA devel-oped and distributed the following newslettersand factsheets : Construction of GroundwaterTreatment System Plant Planned (English/Span-ish) − November 1999, Construction Plans forMotorola, Inc. (52nd St. Plant) Superfund SiteCleanup − February 2000. ADEQ held a publicmeeting to provide a site update on March 2,2000 at the Wilson School District OfficesBoard Room, located at 3025 E. FillmoreStreet, in Phoenix.

Site Status: The Motorola 52nd Street site wasproposed for the National Priorities List (NPL)in October 1984 and placed on the NPL inSeptember 1989. Since 1988, ADEQ has hadthe lead enforcement role at the site. The


Motorola plant was originally constructed in1956 and was in operation until the third quar-ter of 1999 when an investment group, led byTexas Pacific Group, purchased Motorola’sSemiconductor Components Group. Motorolaremains responsible for its share of the remedia-tion effort. The Honeywell facility was con-structed in 1951 and continues to operatetoday. Historically, the Honeywell facility hasoperated under the names of Garrett andAlliedSignal. Motorola signed a Consent Orderon June 20, 1989 agreeing to implement agroundwater and soil remedy for Operable Unit1 (OU1). OU1 consists of on-site soil gasrecovery and treatment, plus on-site and off-sitegroundwater recovery which is conveyed to anon-site facility. These remedies provide contain-ment of groundwater contamination (mainlyTCE) detected east of the Old Crosscut Canal.ADEQ is in the process of conducting a five-year review of the OU1 area to evaluatewhether the remedy at the site remains protec-tive of human heath and the environment. Thefive-year review report will be available to thepublic by December 2000.

On Oct. 22, 1996, Motorola and the city ofPhoenix signed a Consent Decree with ADEQto implement the design of a groundwater con-tainment and treatment system for the secondoperable unit, Operable Unit 2 (OU2). Theinterim remedy selection was finalized in theOU2 Record of Decision in July 1994. The pur-pose of the interim remedy is to provide addi-tional containment of highly contaminated por-tions of the groundwater. The interim remedyincludes groundwater extraction near 20thStreet and Washington, treatment of the waterby ultraviolet oxidation and granular activatedcarbon, and discharge of the treated water tothe Grand Canal for irrigation use. A unilateraladministrative order was issued by EPA toMotorola and AlliedSignal on November 30,1998 for construction, start up and two years ofoperation and maintenance of the groundwatertreatment system. Construction of the treat-ment system began in March 2000 and is

expected to be completed in December 2001.

Within the Motorola 52nd Street site, EPA hasdesignated a third Operable Unit (OU3). EPAwill be conducting a remedial investigation ofthis area and ADEQ will be investigating anysuspected source areas. Honeywell was identi-fied as a potentially responsible party (PRP) inthe Motorola 52nd Street Superfund site inNovember 1992. In July 1992, Honeywellinstalled several monitoring wells at their facili-ty located at 111 South 34th Street. Groundwa-ter quality data from these wells indicated ele-vated concentrations of trichloroethene (TCE),trichloroethane (TCA), dichloroethene (DCE),dichloroethane (DCA) and other volatileorganic compounds (VOCs). Based on results ofsoil gas investigations, Honeywell proceededwith a voluntary vadose zone cleanup using soilvapor extraction (SVE) which began operationin April 1998. At the request of ADEQ, Honey-well submitted a workplan for site characteriza-tion in September 1998. The activities werecompleted in January 1999, including an addi-tional soil gas survey and the installation ofgroundwater monitoring wells. On September19, 1999, Honeywell signed an AdministrativeOrder on Consent (AOC) with ADEQ to con-duct a Focused Remedial Investigation of theHoneywell facility. In December 1999, Honey-well submitted a Research Report and a workplan for investigating potential source areas atthe facility. Honeywell began drilling activitieson July 5, 2000 to install 12 monitor wells atpotential source areas. It is expected that theinstallations will be completed by September2000.

Phoenix-Goodyear Airport NorthSite Boundaries: The Phoenix-Goodyear Air-port (PGA) Superfund site is located approxi-mately 17 miles due west of Phoenix, in thewestern part of the Salt River Valley in CentralArizona. The site study area covers a total areaof about 35 square miles and is divided into asouthern portion (PGA-South) and a northernportion (PGA-North). Contamination from


these two areas is non-contiguous. Except forthe airport, which is owned by the city ofPhoenix, the PGA site lies almost entirely with-in the city of Goodyear, Arizona. The city ofAvondale occupies about two square milesalong the eastern border of the site. The physi-cal boundaries of the PGA North site aredefined by the groundwater contaminationplume which is generally bounded by ThomasRoad to the north, Litchfield Road to the east,the Unidynamics property on Litchfield Road tothe south and Bullard Avenue to the west. Thesite consists of the Unidynamics property andany groundwater contamination emanatingfrom this property.

Contaminants: Contaminants identified at thePGA North site are: chlorinated solvents, main-ly trichloroethene (TCE) and perchlorates.TCE is present in the soils located within theUnidynamics’ property as well as in the ground-water. The perchlorates were discovered in thegroundwater in August 1998.

Public Health Impact: Potential health risksmay exist for individuals who ingest the con-taminated groundwater. No known drinkingwater wells are currently impacted by the con-tamination. Drinking water for the area is pro-vided by the city of Goodyear or the LitchfieldPark Service Corporation (LPSCO). The drink-ing water wells are monitored regularly, asrequired by law. The groundwater contamina-tion is located approximately 70-130 feet belowground surface, thereby eliminating an inhala-tion exposure pathway. The soil contaminationis restricted to the Unidynamics property whereinstitutional controls reduce the potential ofhuman contact.

Community Involvement Activities: EPA pro-duced the following newsletters and factsheets:Significant Environmental Cleanup Proceeds atPhoenix Goodyear Airport − January 1999, andUpdate on Cleanup Activities − January 1999.ADEQ hosted a public meeting to provide asite update on Feb. 18, 1999 at the Agua Fria

Union High School District Offices, located at530 E. Riley Drive, in Avondale.

Site Status: EPA added the PGA site to theNational Priorities List (NPL) in September1983. In 1981, the Arizona Department ofHealth Services discovered that groundwater inthe PGA area was contaminated with solventsand chromium. In 1984, EPA began a remedialinvestigation of the Litchfield Airport Area(presently known as the Phoenix-Goodyear Air-port). From this study, the site was divided atYuma Road into a north and a south portion. InSeptember 1990, the EPA issued an administra-tive order directing Unidynamics to proceedwith soil and groundwater remediation asdescribed in the EPA’s 1989 Record of Decision(ROD). The groundwater portion of the reme-diation program was undertaken in three phas-es. The initial (Phase I) groundwater treatmentsystem began operation in November 1994 andaddresses the area of highest contaminant con-centration. Phase II of the groundwater remedywas enacted and placed into operation inNovember 1996. Phases I and II consist ofextracting the groundwater, removal of the con-taminants by air stripping with emissions con-trol and reinjecting the treated water into thesame aquifer up-gradient of the plume. PhaseIII was implemented in October 1998 with theinstallation of a liquid-phase carbon adsorptionsystem. The soil vapor extraction (SVE) system,for treatment of contaminants in the soil, beganoperation in 1994 to remove the volatile organ-ic compounds from soils. The SVE treatmentsystem includes a thermal oxidation unit whichis equipped with an exhaust scrubber to reduceemissions.

Phoenix-Goodyear Airport SouthSite Boundaries: The Phoenix-Goodyear Air-port (PGA) Superfund site is geographically sit-uated approximately 17 miles due west ofPhoenix, in the western part of the Salt RiverValley in Central Arizona. The site study areacovers a total area of about 35 square miles andis divided into a southern portion (PGA-South)


and a northern portion (PGA-North). Contam-ination from these two areas is non-contiguous.Except for the airport, which is owned by thecity of Phoenix, the PGA site lies almost entire-ly within the city of Goodyear, Arizona. Thecity of Avondale occupies about two squaremiles along the eastern border of the site. Theapproximate physical boundaries of the PGASouth site are Yuma Road to the north, Litch-field Road to the east, Broadway Road to thesouth and Reems Road to the west. The siteconsists of the Loral Defense Systems-Arizona(Loral) property and the Phoenix-GoodyearAirport property and any groundwater contami-nation emanating from these areas.

Contaminants: Contaminants identified in thegroundwater at the PGA South site are:trichloroethene (TCE) and chromium. The soilscontaining chromium and cadmium above theHealth Based Guideline Levels (HBGLs) werestabilized, thereby eliminating the risk of expo-sure by ingestion and inhalation and preventingmigration to groundwater.

Public Health Impact: Potential health risksmay exist for individuals who ingest the con-taminated groundwater. There are no knowndrinking water supply wells on the site. The cityof Goodyear regularly monitors their drinkingwater supply wells, as required by law.

Community Involvement Activities: EPA pro-duced the following recent newsletters and factsheets: Significant Environmental Cleanup Pro-ceeds at Phoenix Goodyear Airport − January1999 and Update on Cleanup Activities − January1999.

Site Status: EPA added the PGA site to theNational Priorities List in September 1983. In1981, the Arizona Department of Health Ser-vices discovered that groundwater in the PGAarea was contaminated with solvents, mainlyTCE and metals, primarily chromium and cad-mium. As a result, In 1984, EPA began a reme-dial investigation of the Litchfield Airport Area

(presently known as the Phoenix-Goodyear Air-port). From this study, the site was divided intoa north and a south portion. The OperableUnit Record of Decision (ROD) for PGA-Southwas signed in 1987.

The remedial investigation and feasibility studyfor the site was completed in June of 1989 andthe Final Remedy ROD was signed in Septem-ber 1989 for PGA North and South. A consentdecree for the final remedy was entered inNovember 1991. This document bindsGoodyear Tire to remediate the Subunit B/Caquifer and contaminated soils. In 1992,Goodyear Tire conducted a removal action ofmetal contaminated soils located at the sludgedrying beds. The soils containing chromium andcadmium above the Health Based GuidelineLevels (HBGLs) were stabilized, thereby elimi-nating the risk of exposure by ingestion andinhalation and preventing further migration togroundwater.

On Oct. 7, 1999, ADEQ approved the closureand decommissioning of the soil vapor extrac-tion (SVE) system. The selected groundwaterremedy involves extraction of the contaminatedgroundwater, treatment by air stripping andreinjection into the same aquifer. The treat-ment system began operation in 1989 and it hastreated more than three billion gallons ofgroundwater. To remove chromium from theSubunit A groundwater, a full scale advancedaffinity chromatography resin (AACR) systemwas installed in July 1999 and is currentlyundergoing minor modifications. The systembegan operation in May 2000. Goodyear Tirehas proposed to accelerate the cleanup of theSubunit A groundwater through the use of airsparging and SVE in the last remaining TCEhot spot. This work is being performed volun-tarily since air sparging is not a requirement ofthe consent decree. The full-scale treatmentsystem should be installed and in operation byfall 2000. The remedy for the Northern andSouthern Subunit C groundwater plumesinvolves extraction, treatment of Subunit B/C


groundwater through liquid phase granular acti-vated carbon (GAC) and reinjection into thesame aquifer. The Northern Subunit C Systembegan operating in February 1994 while theSouthern System began treating groundwater inSeptember 1994. Currently, Goodyear Tire isinvestigating a TCE and chromium plume thatextends just north of Yuma Road. Two monitor-ing wells were installed in August 1999 to fur-ther define this portion of the northern SubunitC plume. Both wells indicate TCE above theMCL and low levels of chromium. Two addi-tional wells were installed in March 2000.

Tucson International Airport Area (TIAA)Site Boundaries: The Tucson International Air-port Area (TIAA) is a 24-square-mile siteplaced on the NPL in 1983. The TIAA sitecontains seven major project areas includingAir Force Plant 44 (AFP 44), Tucson AirportRemediation Project (TARP), the Airport Prop-erty, the Arizona Air National Guard (AANG)162nd facility, Burr-Brown Corporation, the for-mer West-Cap property and West Plume B.ADEQ divided the main plume for remediationpurposes into southern and northern operableunits along an east-west line defined by LosReales Road.

Contaminants: Groundwater investigationsdefined a groundwater contamination plume(main plume) in the regional aquifer. The mainplume, consisting primarily of trichloroethene(TCE), with smaller amounts of dichloroethene(DCE), chloroform and chromium, extendsfrom AFP 44 north past Irvington Road. ADEQis also investigating possible solvent, polychlori-nated biphenyl (PCB) and TCE contaminationat the General Electric facility.

Public Health Impact: ADEQ shut down allmunicipal wells that were contaminated withTCE. Residents have either shut down or con-verted to irrigation wells most of the domesticwells. A few residents with domestic wells withlow levels of TCE continue to use their wells.

Community Involvement Activities: The Uni-fied Community Advisory Board (UCAB) con-ducts public meetings to discuss the site themiddle Wednesday of every other month (Janu-ary, March, May, July, September, November) at6:30 p.m. at the El Pueblo Community Centerin Tucson.

Recent EPA factsheets include: CommunityInvolvement During Remedial Design − February2000, EPA Extends Public Comment Period onProposed Consent Decree − July 1999, Answers toYour Questions About the Proposed ConsentDecree for Cleanup of the Airport Property Soilsand Groundwater − June 1999, EPA AnnouncesSecond Community Meeting on Proposed ConsentDecree for Cleanup of Airport Property Soils andGroundwater − June 1999, EPA to ConductRemoval Action at Former West-Cap of ArizonaFacility − February 1998. The U.S. Air Forcealso publishes a semi-annual progress report foractivities at Air Force Plant 44.

Site Status: The southern operable unit consistsof a groundwater pump, treat and reinjectionsystem operated since 1987 by Raytheon (for-merly Hughes) at AFP 44. The northern opera-ble unit consists of a groundwater pump andtreat system known as the TARP. Clean waterfrom the TARP plant is delivered to the TucsonWater distribution system.

In addition to the main plume, ADEQ has asso-ciated less extensive areas of groundwater con-tamination in the regional aquifer with theAANG property, the former West-Cap property,the Burr-Brown property and West Plume B.ADEQ constructed groundwater pump andtreat systems, which are operational at theAANG, Burr-Brown and former West-Capproperties. EPA constructed the groundwaterextraction system for the former West-Capproperty. This system delivers contaminatedgroundwater from the West-Cap property to theBurr-Brown treatment plant.

EPA and ADEQ are characterizing the extent


and magnitude of groundwater contamination(TCE) in West Plume B which extends fromValencia Road northwest approximately 1.5miles to Drexel Road. In addition to the instal-lation of numerous groundwater monitoringwells, seismic reflection data are being used tohelp characterize the hydrogeology in the area.ADEQ is building a computer model of WestPlume B to help determine the fate and trans-port of TCE in the plume and to help optimizeremediation strategies.

ADEQ began investigation and cleanup of soilcontamination and/or shallow groundwatercontamination at AFP 44, the airport property,the AANG property and the former West-Capproperty. EPA recently completed a shallowsoil-gas survey at the former West-Cap propertywhich identified three possible TCE sourceareas. Depending on the results of planneddeeper soil-gas sampling and computer model-ing, either soil vapor extraction (SVE) or dual-phase extraction (DPE) will probably be used toremediate these source areas.

ADEQ recently finalized a consent decree toaddress cleanup of soils and shallow groundwa-ter beneath the airport property and to providecontinued funding for operation and mainte-nance of the TARP system and provides for thecleanup of a highly contaminated portion of theairport property near the Three Hangers Area.The consent decree calls for four separate reme-dies for the Three Hangers Area, including asoil vapor extraction (SVE), a pump and treatgroundwater remediation system, excavationand off-site disposal of PCB and metals contam-inated soils and sediments, and capping andmonitoring of an abandoned landfill.

162nd Air National Guard (Part of the TIAASite)Site Boundaries: The Arizona Air NationalGuard (AANG) 162nd Tactical Fighter Group,occupies 84 acres of the TIAA site and is locat-ed at 15008 Valencia Road in Tucson. The basebegan operation since 1956 in training func -

tions for various tactical fighter aircraft.

Contaminants: Trichloroethene (TCE) is theprimary groundwater contaminant at this site.

Public Health Impact: There are no knownhuman exposures to groundwater contamina-tion from this site.

Community Involvement Activities: The activi-ties associated with the TIAA site also coverthe AANG 162nd site.

Site Status: The U.S. Air Force is the lead regu-latory agency at this site with ADEQ and EPAproviding regulatory support and technicaloversight of remedial response actions.

Past maintenance and operation practices atthe base led to the contamination of subsurfacesoils and regional aquifer groundwater withvolatile organic compounds (VOCs) includingtrichloroethylene (TCE). ADEQ has performedremedial investigations at numerous facilities onthe base.

The groundwater treatment plant continuesoperation with the pumping rate set for opera-tion at 110 gallons per minute (gpm). InfluentTCE concentrations have been in the eight to10 parts per billion (ppb) range and effluent hasbeen non-detect. ADEQ started a soil vaporextraction system on April 3, 1997 and shut itdown on November 29, 1997, after achievingcomplete soil remediation.

Raytheon Air Force Plant #44 (Part of theTIAA Site)Site Boundaries: Raytheon Air Force Plant#44, located in the southern portion of theTIAA site, is a federally owned weapons manu-facturing facility operated under contract by theRaytheon Corporation (formerly Hughes). Theplant is bounded to the north and east by theTucson International Airport, to the south byHughes Access Road and to the west by theNogales Highway (Route 89).


Contaminants: Historic waste disposal opera-tions at the plant resulted in soil and groundwa-ter contamination of metals and volatile organiccompounds (VOCs), including trichloroethene(TCE). Remediation activities include a large-scale pump, treat and reinjection system; soilvapor extraction systems; dual-phase extractionsystems; and soil excavation and removal.

Public Health Impact: Currently there are noknown human exposures to groundwater con-tamination at this site.

Community Involvement Activities: The activi-ties associated with the TIAA site also coverthe Raytheon Air Force Plant #44 site. In addi-tion, the U.S. Air Force and Raytheon areactive participants in the annual Earth Day cel-ebration in Tucson, and in education and out-reach to Tucson schools.

Site Status: The U.S. Air Force is the lead regu-latory agency at this site with ADEQ and EPAproviding regulatory support and technicaloversight of remedial response actions.

A large scale pump, treat and reinjection systemwas installed in 1987 to provide containmentand remediation of regional aquifer groundwa-ter contamination. The system has removedmore than 22,000 pounds of VOCs to date.

The shallow groundwater zone is currentlybeing remediated. In-situ (in place) bioremedia-tion to address shallow groundwater zone con-tamination began in April 1997, but ceased inApril 1998 because it was having no measurableeffect. Soil vapor extraction (SVE) at severalsolvent waste disposal areas has removed over100,000 pounds of VOCs from subsurface soils.

Nearly 13,000 tons of metals-contaminatedsoils (cadmium, chromium, lead, nickel andcyanide) were removed from the site andshipped to a permitted hazardous waste disposalfacility Utah.

ADEQ completed an Environmental BaselineSurvey to investigate potential additionalsource areas beneath and near Building 801.This investigation led to the installation ofadditional SVE wells around the building toremediate TCE soil contamination.

Williams Air Force BaseSite Boundaries: The former Williams Air ForceBase (WAFB) is located in Mesa approximately30 miles southeast of central Phoenix. It isapproximately 4,127 acres in size and the studyarea includes the entire Base. WAFB is now uti-lized as the Williams Gateway Airport and theArizona State University East and MaricopaCommunity College campus since the removalof military personnel and transition to educa-tional and commercial uses.

Contaminants: Contaminants from base activi-ties included organic solvents and paint strip-pers, petroleum spills, metal plating wastes,hydraulic fluids, pesticides and radiologicalwastes. Discharges and disposal at WAFB hadresulted in soil and groundwater contamination.The remaining groundwater contaminant issueis a plume of jet fuel contamination.

Public Health Impact: There is no known riskto human heath at this time. ADEQ has elimi-nated all exposure pathways through remedia-tion or restricted access or use. ADEQ has notdiscovered any groundwater wells affected bythe contamination.

Community Involvement Activities: ADEQformed a Restoration Advisory Board, whichmeets quarterly.

Site Status: The former base is divided into sixoperable units (OUs), OU-1 through OU-6, foradministrative and record keeping purposes.OU-1 contains the main Base landfill for whicha Record of Decision (ROD) was signed in1994. The remedy specified a permeable capand monitoring wells. In 1997 contaminationwas found in the landfill monitoring wells and


as of January 1999 the remedy is under review.OU-2 addresses the groundwater and soil con-tamination at the Liquid Fuels Storage Area.The remedial investigation at the Liquid FuelsStorage Area has confirmed that the primarycontaminant is jet petroleum grade 4 (JP-4, jetfuel). The groundwater plume at the LiquidFuels Storage Area resulted from the leakage ofapproximately one million gallons of JP-4. Ris-ing groundwater in the area is now covering thefuel which is smeared across many feet of deepsoil making remediation difficult. OU-3 former-ly addressed the vadose zone beginning twenty-five feet below land surface down to the watertable at the Liquid Fuels Storage Area which isnow a part of OU-2. The primary site of con-cern at OU-3 now is the Fire Training AreaNumber 2 (FT-02). The 25,000 cubic yards ofcontaminated deep soils at the site were treatedin place by enhancing natural bacterial break-down of contaminants with bioventing. TheRecord of Decision (ROD) for OU-3 was signedin June 1996. The standards agreed to in theROD have not been achieved, but the US AirForce conducted a risk assessment, which deter-mined that the cleanup levels that have beenachieved do not pose a risk to human health orenvironment. A ROD amendment is nowrequired to approve the new risk assessed stan-dards proposed by the USAF. OU-4 includesSouth Desert Village (SDV) which is slated tobecome student housing for Arizona State Uni-versity East. Beneath SDV is a former six-sta-tion skeet range which was demolished andgraded in 1950, prior to construction of theSDV. Contamination in the form of lead pelletsin soil associated with the former skeet rangeunderlies 85 housing units in the SDV. OU-5was set up to address nine soil sites which wereclosed out through expedited removal actions.The OU-5 ROD was signed in February 1998.OU-6 was established to address three sitesrequiring additional investigation. The site ofprimary concern (site SS-17 Old Pesticide/PaintShop) at OU-6 has revealed soil contamination(dieldrin and volatile organic compounds). Aremoval action of dieldrin contaminated soil is

planned for fall 2000. Investigation of the BaseProduction Well No. 6 revealed lead contami-nation in soils below the Base water tower.

Yuma Marine Corps Air StationSite Boundaries: Marine Corps Air StationYuma (MCAS Yuma) occupies approximately3,000 acres within the city and county of Yuma,Arizona. The city of Yuma, the nearest munici-pality, is located approximately one mile north-west of the station.

Contaminants: For soil, the contaminant ofconcern is asbestos in the form of non-friableasbestos containing material (ACM). The ACMis scattered on top of and buried in the surfacesoil. For groundwater, the contaminants of con-cern are trichloroethene (TCE), dichloroethene(DCE) and tetrachloroethene (PCE). The maingroundwater plume is approximately one milelong and 500 feet wide, and has reached thedown-gradient edge of the base. The maximumconcentration of total solvents is approximately270 parts per billion (ppb). ADEQ has detectedall of the groundwater contamination down-gradient of the old on-station drinking waterwell. The on-station drinking water well is nolonger used and none of the groundwater isused elsewhere on the base.

Public Health Impact: There are no knownpublic health risks at the site.

Community Involvement Activities: ADEQestablished a Restoration Advisory Board forthis site.

Site Status: In February 1990, YMCAS was des-ignated a National Priority List (NPL) site bythe EPA. A Federal Facilities Agreement (FFA)was signed by EPA, ADEQ and the U.S Navyon January 7, 1992. The facility is currentlybeing used by the Marine Corps for the trainingof tactical aircrews.

The shop area, used for aircraft and vehiclemaintenance since the 1940s, has had disposal


and spills. Disposal of waste motor oil, cleaningsolvents, battery acid and anti-freeze occurredoutside the base hobby shop from 1960 to theearly 1980s. Routine maintenance of vehiclesresulted in spills at another site. The fieldworkfor the Remedial Investigation of Operable Unit2 (OU-2), which involves areas of concernregarding soil contamination, was completed inOctober 1994. ADEQ signed the record ofdecision for OU-2 and remediation activitiesbegan in the first quarter of 1999. Remediationactivities involved the offsite disposal of about5,000 cubic yards of asbestos contaminated soilfrom OU-2. Fieldwork for the investigation ofOperable Unit 1 (OU-1), which involves areasof concern regarding groundwater contamina-tion, took place during January and February1995 and is continuing. ADEQ is currentlynegotiating the ROD for OU-1.

The remediation pilot study for the leadingedge of the groundwater contamination is inoperation. The remediation consists of two ver-tical circulation treatment (VCT) wells.

The Navy has drilled 22 new monitoring wellsat the Area 1 plume site to further characterizethat area. The wells drilled were in the apronarea of the runways and in the area around theleading edge of the groundwater contamination.

Department of Defense SitesThe Department of Defense sites are those sitesthat are located at either active duty bases orbases being closed under the Base Realignmentand Closure (BRAC) regulations and FormerlyUsed Defense sites that are eligible for fundingunder the Installation Restoration Program asoverseen by ADEQ.

161st Air National GuardSite Boundaries: The 161st Air National Guardis located on the southwest corner of a 50.7acre site at Phoenix Sky Harbor InternationalAirport between the south runway and the SaltRiver Channel. The Air National Guard Base,constructed in 1957, is located just south of the

airport. The facility is currently used for a refu-eling group in support of Air Combat Com-mand activities.

Contaminants: Past aircraft maintenance andfueling operations at the site led to surface andsubsurface soil and groundwater contaminationwith petroleum products and volatile organiccompounds (VOCs).

Public Health Impact: The benzene groundwa-ter plume is limited to the site and has notaffected any water supply wells. There are noknown health risks associated with subsufacesoil contamination at the site.


Site Status: Investigation and remediationefforts at the facility have increased as part ofthe expansion activities planned for the adja-cent Phoenix Sky Harbor International Airport.To date, the most significant contaminationappears to be associated with the Petroleum,Oils and Lubricants (POL) storage area, wheresoil contamination is evident. Groundwatercontamination in this area includes a plume ofbenzene which remains well within the bordersof the facility. The remediation selected for thearea is a vapor extraction and air sparging treat-ment system (VES). A VES pilot study wasconducted and then discontinued in July 1999.The underground storage tanks (USTs) at thePOL area are scheduled to be removed duringJuly 2000. ADEQ has partially installed thefinal VES, which will be operational after theremoval of the POL USTs.

Barry M. Goldwater RangeSite Boundaries: The Barry M. GoldwaterRange (BMGR) is approximately 2.7 millionacres in size. BMGR is a military training areaformed from Bureau of Land Management(BLM) and US Fish and Wildlife Service(USF&WS) lands in southwestern Arizona.


The range is under the overall management ofthe United States Air Force, but is divided intotwo management units for the Air Force andthe Marine Corps. The portion of BMGR man-aged by the USF&WS is the Cabeza PrietaNational Wildlife Refuge (NWR), and formsabout 30 percent of the BMGR area.

Contaminants: An Installation Restoration Pro-gram (IRP) conducted by Luke AFB on BMGRin 1992 identified 43 sites. As part of a siteinvestigation, ADEQ has conducted additionalinvestigations at 12 of these sites. The siteinvestigation includes two areas at the GilaBend Auxiliary Air Field with the remaining 10sites dispersed at the former Ajo Air Station(within the NWR), Sentinel Navy antenna siteand various locations within the range.

Public Health Impact: ADEQ has eliminated allexposure pathways through access and userestrictions.


Site Status: BMGR is not a military reservation,but is a military usage area formed as a congres-sional withdrawal for military purposes from theBLM and USF&WS lands and subject to con-gressional renewal every 15 years. Luke AFB iscoordinating the environmental process for thecongressional renewal action, due in 2001. TheAir Force has prepared a Draft Legislative Envi-ronmental Impact Statement (DLEIS), whichADEQ is reviewing.

Camp Navajo (AZ Air National Guard)Site Boundaries: The Camp Navajo site (for-merly Navajo Depot Activity), is located inBellemont, in north-central Arizona 12 mileswest of Flagstaff and 17 miles east of Williams.The facility encompasses 28,347 acres and is sit-uated in heavily forested to grassy, gently rollingto steep hilly terrain approximately 7,100 feetabove mean sea level. Facilities at Camp Navajo

include approximately 170 buildings, of which32 are currently used for administration, main-tenance, operations and storage. There are 776igloo structures for storage of conventional (andformerly chemical) munitions. There is a demo-lition area in the southern portion, and bufferzones along the eastern and western borders ofthe base.

Contaminants: Contaminants of concerninclude heavy metals, volatile organic com-pounds (VOCs), semi-volatile organic com-pounds (SVOCs), pesticides and constituents ofexplosives.

Public Health Impact: A public health riskexists due to unexploded ordinances on the site.This risk is managed by restricting site access toArizona Air National Guard personnel only.

Community Involvement Activities: ADEQmay develop a Community Action Board forthis site.

Site Status: Environmental studies at CampNavajo began in December 1979. Types of sitesinclude ammunition demolition areas, ammuni-tion workshops, munitions storage, munitionstesting and training ranges, operations facilities,hazardous materials storage, and solid waste dis-posal.

The EPA has completed its Preliminary Assess-ment/Site Inspection (PA/IS) Reevaluation ofCamp Navajo. The report incorporated recordscontained in the 1991 Master EnvironmentalPlan (MEP) and subjected available samplingdata to Hazard Ranking System (HRS) scoring.In October 1993, EPA notified the AZANGthat Camp Navajo did not score high enough tobe placed on the National Priorities List (NPL).

Remediation plans for the Former SanitaryLandfill #5 is excavation of contaminated soils.The NGB intends to cap the landfill after fur-ther characterization. The remediation activityfor Building 318/319 involves excavation of


contaminated soils, re-routing of run-off wateraway from the marsh area near Building318/319, and the de-watering and remediationof a small perched aquifer contaminated withtrinitrotoluene (TNT). Recently, the workplanand sampling and analysis plan for Building318/319 was resubmitted to ADEQ during themeeting with the facility representatives onSept. 2, 1998. The intended remediation for theexcavated TNT-contaminated soils aroundBuilding 318/319, and the closed TNT reten-tion ponds will be bioremediation (composting).

Davis-Monthan Air Force BaseSite Boundaries: Davis Monthan AFB(DMAFB) is located in eastern Tucson. Thenorthern boundary gradually descends to thesouth from Golf Links Road to Irvington Road.The boundary to the east is Harrison Road.Alvernon Way is the western boundary. Thesouthern most boundary is Valencia Road onthe east side of the site area. The study areaconsists of the entire base.

Contaminants: Contamination at the baseincludes surface soil contaminated with petrole-um wastes, waste piles of hazardous aluminumdross and groundwater contaminated with jetfuel from a large volume underground jet fuelleak. ADEQ treated the aluminum dross con-tamination (from past melting of obsolete air-craft) on the base by solidification/stabilizationand transported it to an off-site landfill.

Public Health Impact: Contamination at thesite is limited to the subsurface soil and ground-water. There is no known risk to human healthfrom the site.

Community Involvement Activities: ADEQformed a Restoration Advisory Board for thesite, which meets on a semi-annual basis.

Site Status: DMAFB, a 10,000-acre trainingbase for tactical aircraft crews and the primarystorage facility for obsolete or excess aircraft,began operation at this site in 1925. EPA initi-

ated the Installation Restoration Program 1982,which has identified 49 potential areas of con-cern.

At the area known as site ST-35/Fuel Pump-house No. J3, groundwater remediation of thejet fuel leak started in early 1994. An estimated1.7 million cubic feet of soil contaminated withJP-4 jet fuel are present in the subsurface at thissite. ST-35 is the only site on the base wheredeep contamination of soil and impacts togroundwater are documented. Sampling at thesite revealed trace amounts of volatile compo-nents of jet fuel (BTEX) contamination (cur-rently below drinking water standards) ingroundwater below what was considered a natu-rally-occurring protective clay layer. Follow upsampling after a pump and treat programrevealed only clean water. A soil vapor extrac-tion study project was initiated in early 1994.Subsequent cleanup was initiated through a soilvapor extraction system.

The Main Base Landfill/LF-01 site was usedfrom the early 1940’s to 1976 for disposal ofhousehold garbage, metals, cars and aircraft,thinners, solvents, pesticides and other items.Numerous rounds of soil and groundwater sam-ples were collected between 1983 and 1994 andtested for volatile organic compounds (VOCs),metals, pesticides, polychlorinated biphenyls(PCBs), petroleum hydrocarbons and othercompounds. All compounds detected were atlevels below regulatory standards. An additionalgroundwater monitoring well was installed inNovember 1998 and a landfill cover wasdesigned and installed in 1999. ADEQ has con-structed the landfill cover for LF-01, and is con-sidering a landfill gas collection andtreatment/control system.

Fort HuachucaSite Boundaries: Fort Huachuca is an Armypost located in Sierra Vista, in southeasternArizona. Fort Huachuca began operation in1877.


Contaminants: The areas of interest, whichresulted from two consent decrees with ADEQ,involve four hazardous waste sites and 18underground storage tank or leaking under-ground storage tank sites.

Public Health Impact: There are no knownhealth risks from this site.


Site Status: Of the 20 sites considered to besolid waste sites from the original ConsentOrder, 11 sites remain. Six of these sites requireno further action and are awaiting a decisiondocument for closeout. The remaining five sitesare at different stages in the evaluation process.The need for future work at the South RangeLandfill is dependent upon the informationobtained from split samples taken in May 2000.Work to remove a sump and take samples in thevicinity of the sump at the Vehicle Paint SprayBooth (Building 72907) is scheduled to be per-formed during July 2000. Results will determinethe need for any additional cleanup at this site.ADEQ has approved a work plan to completethe investigation of surface and subsurface soilat the Libby Army Airfield Fire Fighting Train-ing Area. Preparation of a work plan to deter-mine if the presence of arsenic at the GolfCourse Pesticide Mix Area is naturally occur-ring will be initiated shortly.

Gila Bend Auxiliary Air FieldSite Boundaries: The Gila Bend Auxiliary AirField is located approximately two miles southof Gila Bend off of State Highway 85.

Contaminants: In 1994, the Air Force conduct-ed site investigations of two sites at the facility,the former fire training area FT-27 and a nearbymaintenance area. Limited contamination wasfound at the former fire training area with adetermination that it did not pose a threat togroundwater. Sampling of the maintenance area

did not reveal any contamination warrantingfurther action.

Public Health Impact: There are no knownhealth risks from this site.


Site Status: The facility dates back to the early1940’s when it was part of the Gila Bend Gun-nery Range. It was an active Air Force facilityuntil approximately 1995. It was used in supportof aircraft using the adjacent Barry M. Goldwa-ter Range and for maintenance of the range andrange targets. This activity is now supported byprivate contractors utilizing portions of the for-mer facility. The facility is managed by Luke AirForce Base.

Yuma Army Proving Grounds (YPG)Site Boundaries: The U.S. Army Yuma ProvingGround (YPG) is located on the California-Arizona border north of Yuma. YPG is located32 miles northeast of Yuma, and occupiesapproximately 870,000 acres in Yuma and LaPaz counties. Its western edge is adjacent to theColorado River.

Contaminants: Contaminants of concerninclude petroleum hydrocarbons, volatile organ-ic compounds (VOCs), semi-volatile organiccompounds (SVOCs) and metals. Contaminat-ed media are soil and groundwater.

Public Health Impact: Contaminated ground-water is limited to the site boundaries. There isno risk to the public drinking water supply wellsof Yuma.

Community Involvement Activities: ADEQdeveloped a community involvement plan forthe YPG site. Proposed activities include publicmeetings and open houses, factsheets anddevelopment of a Community Advisory Group.


Site Status: YPG was first used by the militaryin 1942 for training desert troops and the mili-tary has since used it for testing and evaluationof a variety of military equipment includingboats, vehicles, well drilling equipment, tanksand munitions. In a 1984 survey of YPG by theEPA Region IX Resource and ConservationRecovery Act Corrective Action Unit, YPG didnot qualify for the National Priorities List.

The army’s Installation Restoration Programmanages environmental investigation andcleanup at U.S. Army facilities. The army con-ducted an assessment of the solid waste man-agement units (SWMUs) at YPG as part of theInstallation Restoration Program and identified19 units for investigation under the remedialinvestigation and feasibility study.

The determination that approximately 500,000gallons of fuel may have been released at thesite between 1965 and 1975 designated the FuelBladder Test Area (FBTA) was for immediateinvestigation. Analyses of groundwater samplesfrom monitoring wells installed during ongoinginvestigation of the site show evidence of petro-leum and petroleum by-products. The effective-ness of soil vapor extraction technology will bestudied in July 2000. At another site, the For-mer Waste Disposal Area (FWDA), ADEQ isconsidering a fence to limit access to the site asan interim remedial action and an institutionalcontrol.

ADEQ has reviewed and approved reports forthe remedial investigation sampling and analysisplan (SAP) for selected sites, as well as thequality assurance project plan (QAPP) for theYPG site. ADEQ plans to install monitoringwells for the FWDA and the FBTA.

WQARF Report, Superfund Programs Section · 2003-09-30 · Water, soil, air and soil gas samples...

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Transcript of WQARF Report, Superfund Programs Section · 2003-09-30 · Water, soil, air and soil gas samples...