CH2M HILL

1034 S. Brentwood Blvd.

Suite 2300

51. Louis, MO 63117

Tel 314.421.0900 CI~2MHILl Fax 314.421.3927

June 23, 2009

Mr. Scott G. Bradley Project Manager, CEHNC-ED-CS-P US. Army Corps of Engineers Huntsville Engineering and Support Center 4820 University Square Huntsville, AL 35816

Subject: Site WP-04 Final Record of Decision USACE Contract No. DACAB7-02-D-0006-0003, Task Order 0012

DE'ar Mr. Bradley,

Please find enclosed one hard copy of the Final Record of Decision for Site WP-04 at· Whiteman Air Force Base under USACE Contract No. DACA87-02-D-0006-0003, Task Order 0012. The signature page in Section 1 of the attached document is blank. Once the signatures have been obtained by Mr. Glenn Golson of Whiteman AFB, a copy of the signature page will be distributed for you to insert in your hard copy. At that time, the electronic copy of the signed document will be distributed with the signature page.

Comments Wt~re received from the Missouri Department of Natural Resources (MDNR) on the draft final version of the document. The responses to these comments are attached as well. A teleconference with Mr. Drew Reed and Mr. Ruben Zamarripa of MDNR was held on 10 Jun 09. Based on di:;cussions during the teleconference, a revised version of the Record of Decision was submitted to the MDNR for review. Mr. Drew Reed submitted a concurrence letter following his review of the revised document. The concurrence letter is attached.

Please call if you have any questions regarding this document.

Sincerely,

CH2M HILL

40321766

Tiffany Swoveland Chapman Project Manager

I~IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII~ IIII Superfund

cc: Mr. Drew Reed/MDNR (3 hard copies) Mr. Clint Sperry /USEPA, Region 7 (1 hard copy) Mr. Eric Barefoot/ AFCEE (2 hard copies) Mr. Glenn Golson/Whiteman AFB (3 hard copies and 2 hard copy signature pages) Ms. Tiffany Swoveland Chapman/CH2M HILL (2 hard copies)

COPYRIGHT 2009 BY CH2M HILL. INC.• COMPANY CONFIDENTIAL

Environmental Restoration Program

Whiteman Air Force Base

for

Site WP-04

Excess Pesticide Disposal Area

USAF Contract No. DACAB7-02-D-0006-003

Task Order 0012

Preparedfor

Whiteman Air Farce Base Missouri

Prepared by

CH2MHILL

June 2009

• --------------,-----Final Record of'Decision

Site~ WP-04 Whiteman Air Force Base

Knob Noster, M[issouri

Prepared by

Air Force Center for EngineerilL1g and the En.vironment

June 2009

RECEIVED JUN 26 2009

SUPERFUND DIVISION

•

.~ t:ontents

Acronyms and Abbreviations ........................................................................................................... v 1. Declaration............................................................................................................................1-1

1.1 Statement of Basis and Purpose ........................................................................... 1-1 1.2 Description of Selected Remedy ........................................................................... 1-1 1.3 Statutory Determinations ...................................................................................... 1-1 1.4 Authorizing Signature ........................................................................................... 1-2

2. Decision Summary ............................................................................................................. 2-1 2.1 Site Name, Location, and Description ................................................................. 2-1 2.2 Site History and Enforcement Activities ............................................................. 2-1 2.3 Community Participation ...................................................................................... 2-2 2.4 Scope and Role of Response Action ..................................................................... 2-3 2.5 Site Characteristics ................................................................................................. 2-3

2.5.1 Geology ....................................................................................................... 2-3 2.5.2 Hydrogeology ............................................................................................ 2-4 2.5.3 Surface Water ............................................................................................. 2-4 2.5.4 Nature and Extent of Contamination ..................................................... 2-4 2.5.5 Fate and Transport of Contamination .................................................... 2-5

• 2.6 Current and Potential Future Land and Resource Uses ................................... 2-5 2.7 Summary of Site Risks ........................................................................................... 2-5

2.7.1 Hunlan Health ........................................................................................... 2-5 2.7.2 Ecological ................................................................................................... 2-5

2.8 Principal Threat Waste .......................................................................................... 2-6 2.9 Selected Remedy (No Action} ............................................................................... 2-6 2.10 Documentation of Significant Changes ............................................................... 2-6

3. Responsi"eness Summary ................................................................................................. 3-1 3.1 Stakeholder Comments and Lead Agency Responses ...................................... 3-1 3.2 Technical and Legal Issues .................................................................................... 3-1

4. References ............................................................................................................................ 4-1

2-1 Bast~ Location Map 2-2 Site Location Map 2-3 Historical Site Features 2-4 Current Site WP-04 Surface Soil Results above the Screening Level

• MKEI091670001 WHITEMAN AIR FORCE BASE JUNE 2009

III

• ~~cronyms and Abbreviations

AFB Air Force Base Beta-BHC beta-Benzenehexachloride CERCLA Comprehensive Environmental Response, Compensation, and Liability Act DOD dichlorodiphenyldichloroethane DOE dichlorodiphenyldichloroethylene DDT dichlorodiphenyltrichloroethane ERP Environmental Restoration Program MDNR Missouri Department of Natural Resources ROD Record of Decision USAF United States Air Force USEPA United States Environmental Protection Agency

• MKEI091670001 WHITEMAN AIR FORCE BASE JUNE 2009

V

'1. Declaration

1.1 Statement of Basis and Purpose Whitt!man Air Force Base (AFB) is located in Knob Noster, Johnson County, Missouri. This Record of Decision (ROD) presents the closure documentation fOT Site WP-04, the Excess Pesticide Disposal Area. The pesticide storage area was located north and east of the former Civil Engineering Compound and the site overlaps the east side of Site LF-OB, Landfill 1. The site was used since the 1950s to formulate pesticide solutions and to store pesticide application vehicles.

No further action is required fOT Site WP-04 at Whiteman AFB. This conclusion was chosen in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), as amended by the Superfund Amendments and Reauthorization Act of 1986, and, to the extent practicable, the National Oil and Hazardous Substances Pollution Contingency Plan. This decision is based on the Administrative Record file for the site and complies with 40 Code of Federal Regulations, Part 300. The lead agency-the United States Air Force (USAF)-and the Missouri Department of Natural Resources (MDNR) have worked together to determine that no action is required for Site WP-04. The United States Environmental Protection Agency (USEPA) coordinates reVIews with MDNR, as appropriate.

1.2 Description of Selected Remedy Evaluation of the site concluded that the residual contamination did not present a risk under the current and anticipated future industrial scenarios or the possible future residential scenario. The lead agency has determined that no action is necessary to protect public health or welfare or the environment from exposure to media, consisting of surface soil, subsurface soil, surface water, and groundwater at Site WP-04. A data certification checklist is not applicable for the ROD, since no chemicals of concern are present at the site and the residual contamination does not present a risk. Therefore, a no further response a.:tion was selected for Site WP-04.

No further action is required and was stated as such in the Proposed Plan for Site WP-04 Environmental Restoration Program Site (ERP) (CH2M HILL 2007). The Proposed Plan was distributed to the community and a public availability session was held on March 25, 2009. The session was held to give citizens the opportunity to comment on the Proposed Plan. No comments were received from the community regarding the Proposed Plan.

1.3 Statutory Determinations

• Sampling results for pesticides at Site WP-04 concluded that the residual contamination at the site does not pose risk under the current and anticipated future industrial scenario or the possible fu.ture residential scen<lrio. Therefore, the no remedial action response meets the

MI(EI091670001 1·1 WHITEMAN AIR FORCE BASE JUNE 2009

RECORD OF DECISION

statutory requirements of CERCLA; because no hazardous substances, pollutants, or contaminants remain onsite at concentrations above levels that would limit use, as-year •review will not be required for this remedial action.

1.4 Authorizing Signature

ROBERT E. WHEELER, Brig Gen, USAF Date Commander, 509th Bomb Wing

ROBERT GELLER Date Missouri Department of Natural Resources

•

• 1·2 MKE'OO1670001 WHITEMAN AIR FORCE BASE JUNE 2009

• :l. lDecision Summary

This decision summary describes Site WP-04, the Excess Pesticide Disposal Area, at Whiteman AFB. It also summarizes legal and public involvement issues.

2.1 Site Name, Location, and Description \.Vhiteman AFB is located in west central Missouri, in Johnson County, about 2 miles south of Knob Noster (Figure 2-1). The base is 9 miles east of Warrensburg, 22 miles west of Sedalia, and 70 miles southeast of Kansas City. USAF is the lead agency.

USAF, throLlgh the ERP, has financially supported site studies and c1osurl~ activities for Site WP-04, the Excess Pesticide Disposal Area. The site is located near the northl:~m boundary of ~n1iteman AFB (Figure 2-2). The site is roughly 10 acres in size.

The pesticide storage area was located north and east of the former Civil Engineering Compound and the site overlaps the east side of Site LF-08, Landfill 1. Historical site limits included the Petroleum, Oils, and Lubricants Storage Yard north of First StrE'et. The storage yard has been reconstructed since Site WP-04 was active and is no longer considered part of the

• site (Figure 2-3).

The Administrative Record contains documents that present the information used to make the no further response action decision. Documents completed for the site include the Phase I, Records Search Report (Engineering-Science 1984), IRP Phase II - RIffS Stage 2 - Draft Report (Black & Veatch 1989), Installation Restoration Program (J RP), Stage 2 Remedial Investigation/Feasibility Study, Final Report, Whiteman Air Force Base, Knob Noster, Missouri (Black & Veatch 1991), Decision/Closure Docul1lentfor the Lilled Soil Stockpilefrom Site WP-04 Ilt Landfill No.5, Installation Restoration Program (O'Brien & Cere 1997), Confirmatory Surface Soil Sampling Resultsfor Pesticides at Site WP-04, Whiteman Air Force Base Technical MelllorandulIl (CH2M HILL 2008), and Proposed Plan fur Site WP-04 E/'/11iron/llel1tall~estumlio17 Program Site V';hitemml Air Force Base, MO (CH2M HILL 2009).

2.2 Site History and Enforcement Activities Previous investigations included the collection and analysis of surface soil, subsurface soil, surface water, and groundwater samples at Site WP-04. No enforcement actions were imposed on Site WP-04 as a result of the findings of the investigations described below.

The site was used since the 1950s to formulate pesticide solutions and to sLore pesticide application vehicles. Figure 2-3 shows the approximate location of the former Pesticide Storage Building (Building 157). Current and expected land use is industnal.

Site WP-04 was identified as a potential area of contamination as a result of a records search conducted during Phase I of the Installation Restoration Program investigation to identify potentially hazardous waste disposal and spill sites at Whiteman AFB (Engineering-Science 1984). In 1985 and 1987, soil samples were collected and analyzed during the Phase II Stage 1

MKEI091670001 2·1 WHITEMAN AIR FORCE BASE JUNE 2009

SECTION 2-DECISION SUMMARY

investigation (Black & Veatch 1989). In 1988 and 1989, surface soil, subsurface soil, and surface water sampling were performed during the Phase II Stage 2 remedial investigation/feasibility study to delineate the nature and extent of contamination at Site WP-04 (Black & Veatch 1989). • Documents dating to 1997 and conversation with Whiteman AFB Environmental Flight personnel on October 16, 2007, indicate that pesticide-contaminated soil was excavated from Site WP-04 in 1988 and 1989 and stockpiled at Site LF-03, Landfill 5, for testing and disposal. The stockpiles consisted of an uncontained stockpile of 25,000 cubic yards of soil contaminated with pesticides from Site WP-04 and a separate contained stockpile of 1,200 cubic yards, also from Site WP-04 (Figure 2-3). The smaller stockpile was separated because of higher concentrations of pesticides and contained by high-density polyethylene placed beneath and around the soil pile.

The stockpiles were generated during the construction of the Pavements and Grounds Building (Building 169) between 1988 and 1992. According to Environmental Flight personnel, the entire block between First and Third streets and between Vandenburg Avenue and McConnell Lane was regraded during the construction. The material was temporarily stockpiled within Site WP-04 during construction and relocated to Site LF-03 for testing and disposal. Tom Retterman of MDNR approved the Site WP-04 excavation and removal activities on July 8, 1992.

The soil beneath a small temporary stockpile constructed from soils with the highest concentrations of pesticides was tested in 1992, but was found not to have been affected by the stockpiled material. The soil stockpiles at Site LF-03 were sampled in 1996, and results showed lower levels of pesticides and herbicides than previously anticipated, with concentrations below the regulatory toxicity characteristic level. The stockpiles therefore were leveled and contoured on Site LF-03 with the concurrence of MDNR (O'Brien & Gere 1997). Jacobs Engineering Group collected groundwater samples at Site WP-04 in 1996, after the affected soil was removed. The groundwater samples were analyzed for total petroleum hydrocarbons, aromatic volatiles, pesticides, polychlorinated biphenyls, and herbicides. The concentrations in groundwater did not exceed the MDNR screening levels.

Based on historical pesticide concentrations, the USAF agreed to collect confirmatory surface soil samples at MDNR's request in 2008 (CH2M HILL 2008). The object of confirmatory surface soil sampling was to verify that pesticide contamination - specifically chlordane, dieldrin, dichlorodiphenyldichloroethane (DOD), dichlorodiphenyldichloroethylene (DOE), and dichlorodiphenyltrichloroethane (DDT)­was removed from the site during removal actions conducted in 1988 and 1989, and during regrading associated with the construction of the Pavement and Grounds Building from 1988 through 1992. Analytical results indicate concentrations were below current human health residential and industrial screening levels. Two chlordane detections exceeded the conservative ecological screening level, but the risk to ecological receptors was determined to be unlikely, and no further investigation is warranted (CH2M HILL 2008).

2.3 Community Participation

•

Regulations under CERCLA require public participation to occur before and at the completion of the ROD (e.g., 40 Code of Federal Regulations, § 300.430[£][3]). To meet these • 2·2 MKEI091670001 WHITEMAN AIR FORCE BASE JUNE 2009

--------------------------------------------------------SECTION 2- DECISION SUMMARY

• obligations, USAF provided the community with information regarding the closure of Site \,yp-04 at Whiteman AFB through a public meeting/availability session and distribution of the Prop(lsed Plan. The Proposed Plan and public meeting/ availability session were

•

a~nounced in local publications.

Published ERP reports are available to the public at Whiteman AFB. The Whiteman AFB Natural Resources Manager or surrogate is responsible for maintaining the repository and ensuring that documents are added to the information file as work progresses.

A public comment period for the Proposed Plan, which corresponds to this ROD, began March 5 and ended April 4, 2009. The Proposed Plan was mailed directly to those addresses on the Whiteman AFB mailing list for public review. The plan included information announcing the public comment period and associated public meeting/ availability session. A public notice summarizing the Proposed Plan and announcement of th{~ public comment period and associated public availability session was published in local publications.

Representatives from USAF, MONR, and CH2M HILL were available to answer questions regarding the ERP at Whiteman AFB at the public meeting/availability session held March 25,2009. No comments were received at the public meeting/availability session, and no comments were received from the public during the public comment period.

') 4 ~.. Scope and Role of Response Action Site WP-04 is one of 44 ERP sites investigated under CERCLA at Whiteman AFB. The Management Action Plan for Whiteman AFB includes the current CERCLA status and schedule of remedial actions for each site. The Management Action Plan and supplemental information can be found in the Administrative Record. No further action is proposed in this ROD for the surface soil, subsurface soil, surface water, and groundwater at Site WP-04.

2.5 Site Characteristics This section describes the pertinent physical characteristics of Site WP-04 nnd summarizes the nature, extent, fate, and transport of contamination based on environrnental sampling data from the site-specific investigations.

Subsequent sections describe the shallow geology, hydrogeology, surface water conditions, nature and extent" and fate and transport of contamination, risk assessments, and the conceptual site model.

:2.5.1 Geology The unconsolidated materials beneath Site WP-04 consist primarily of a lean cIay grading in o:oloration from brown to gray with depth. The soil is composed of QuatE'rnary unconsolidated residuum. Trace quantities of gravel are present in the IE~an clay. At depth. the lean cIay grades to a clay with gravel. A clayey shale underlies the unconsolidated overburden at around 15 feet below ground. The shale bedrock is encountered around 20 to 30 feet below ground and about 15 feet thick. In some places, the clay is underlain by a wet sandy to gravelly clay layer derived from the weathering of shale bedrock. In others, small amounts of shale fragments were observed in the clay, most often near bedrock.

MKE\09167001)1 2·3 WHITEMAN AIR ;:OReE BASE JUNE 2009

SECTION 2-DECISION SUMMARY

2.5.2 Hydrogeology Groundwater beneath Site WP-04 flows to the north. The moisture content of the lean clay increases with depth approaching the clayey shale, where groundwater is most prevalent. The • unit appears to be semiconfining, as evidenced by a rise in the groundwater within the monitoring wells at the Base. Groundwater elevations were measured in August 2004 and range from 827.28 to 832.33 feet. No slug tests have been performed at the site to date. Groundwater velocities for the site have not been measured but are in the range of 10 feet/ day, as at other similar sites. The shallow groundwater system is created by the infiltration of precipitation and typically discharges to local streams. The shallow groundwater is not used for water supply. Wells for drinking water extend to deep aquifers underlying the Base at depths of 1,000 to 1,200 feet below ground. There is no known connection between the shallow groundwater and the deep aquifers used for drinking water.

2.5.3 Surface Water There are no surface water bodies within the boundaries of Site WP-04. A creek north of Site WP-04 receives surface water from the site.

2.5.4 Nature and Extent of Contamination Prior to the excavation activities between 1988 and 1992, chlordane, 4,4-DDT, and dieldrin were detected in surface soil samples. Dieldrin was detected above the historical MDNR screening level. Dinoseb was detected in the subsurface soil samples below the historical MDNR screening level. Following this sampling event, the pesticide-contaminated soil was excavated, placed in a temporary stockpile at Site WP-04, and then relocated to Site LF-03, Landfill 5, for testing and disposal. The soil beneath the stockpiles at Site WP-04 was tested in 1992, after the stockpiles were relocated, and found not to have been affected by the stockpiled material. Testing performed on the relocated stockpiles determined that the material could remain at Site LF-03, and the stockpiles were leveled and contoured on Site LF-03 with the concurrence of MDNR (O'Brien & Gere 1997).

Based on historical pesticide concentrations, the USAF agreed to collect confirmatory surface soil samples at the MDNR's request in 2008 (CH2M HILL 2008). The data from the samples were compared to the Missouri Risk Based Corrective Action Tier 1 Risk Based Target Levels for clay soils for residential and industrial human health exposure pathways and USEP A Region 5 Resource Conservation and Recovery Act Ecological Screening Levels for ecological exposure pathways. Concentrations of chlordane, DOD, DOE, DDT, and dieldrin were detected in the samples. Analytical results indicate concentrations were below current human health residential and industrial screening levels. Two chlordane detections exceeded the conservative ecological screening level and were evaluated for ecological risk (Figure 2-4; CH2M HILL 2008).

Groundwater samples were collected at Site WP-04 in 1996, after the affected soil was removed. Beta-Benzenehexachloride (beta-BHC), g-chlordane, and endosulfan were detected in the groundwater samples at concentrations below the historical MDNR screening levels.

•

• MKEI091670001

WHITEMAN AIR FORCE BASE JUNE 2009 2-4

SECTION 2- DECISION SUMMARY

• Surface water samples were collected from the creek that drains Sites WP··04 and LF-08 in 1988. Dieldrin and beta-BHC were detected above historical MDNR screening levels, but these samples were collected before the 1992 soil removal described above.

•

2.5.5 Fate and Transport of Contamination The most significant migration pathway of potential concern for pesticides is erosion of soil with adsorbed pesticides. Erosion of soil with adsorbed pesticides is of greatest concern for sites without grass cover or with steep slopes. Erosion of soil is not likely to be significant at flat, grass-covered, or paved areas like Site WP-04.

2:.6 Current and Potential Future Land and Resource Uses The current and anticipated future land use at Site WP-04 is industrial. However, a hypothetical future residential scenario had been evaluated during the previous investigations. The site consists of roughly 10 acres of mostly paved surfaces and mowed grass and encompasses part of the former Civil Engineering Compound and the Pavements and Grounds Building. The area is within a secure area of the Base. Therefore, the current and future uses of the site and surrounding areas are industrial activities (considered an industrial land use). A drinking water well restriction in the Base General Plan prohibits the installation of drinking water wells in the shallow aquifer at the Base and requires that deep drinking water wells there be cased or sealed off from the ground surface to 80 feet below ground in accordance with Missouri regulations. The regulations prevent shallow groundwater from entering drinking water supply.

Summary of Site Risks

2:.7.1 liuman Health The human heath risk assessment was prepared for soil and surface water data as part of the previous investigations that occurred prior to the soil removal. Groundwater and soil data collected after the soil removal activities, which represent current site conditions, were below the MDNR human heath screening levels. Therefore, there are no complete human health exposure pathways.

~~.7.2 IEcological An ecological risk assessment prepared for Site WP-04 in 1989 (before the removal) concluded that contaminants at Site WP-04 pose no substantial risk to the environment (Black & Veatch 1989). Although terrestrial plant and animal receptors could come in contact with contaminants in soil, exposure was expected to be insignificant because of the low quality of habitat at the site. Adverse effects on wildlife were also not observed.

Since two chlordane detections in surface soil analyzed in 2008 exceeded lhe conservative E~cological screening level, exposure pathways are complete. However, potential risk is

• unlikely because of the low quality of the habitat and low levels of concentrations observed compare to the screening levels. Therefore, the risk to ecological receptors is unlikely, and no further investigation is warranted (CH2M HILL 2008).

MKEI091670001 2·5 WHITEMAN AIR FORCE BASE JUNE 2009

SECTION 2-DECISION SUMMARY

2.8 Principal Threat Waste The NCP expects that treatment that reduces the toxicity, mobility, or volume of the •principal threat wastes will be used by a remedy to the extent practicable. No principal threat waste is present at Site WP-04.

2.9 Selected Remedy (No Action) Based on the results of previous investigations conducted at Site WP-04, no unacceptable risks to human health and the environment exist. USAF and MDNR have determined that no action is required for Site WP-04. There are no principal threat wastes at the site, and a no-action determination for the site meets the statutory requirements of CERCLA Section 121 and the requirements of the NCP for protection of human health and the environment. Because Site WP-04 does not pose a risk to human health or the environment under the most conservative exposure scenario, no restrictions on land use are necessary.

2.10 Documentation of Significant Changes There are no changes in this ROD from the Proposed Plan.

•

• 2·6 MKEI091670001 WHITEMAN AIR FORCE BASE JUNE 2009

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• I

• E042004001WDC

• Figure 2-1 Base Location Map

Record of Decision lIVhiteman Air Force Base, Missouri

~~~~~~~~~~~~~~CH~HILL 185501fig41 .dgn ___ __________________________________

•

•

N

LEGEND

t• c:::J SITE LIMITS

FIGURE 2-2 c:::J INSTALLATION BOUNDARY 3,000 SITE LOCATION MAP

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! F... RECORD OF DECISION WHITEMAN AIR FORCE BASE, MISSOURI

...11LOK PRO ...................- - ITEMAN -A ...-IM ""'""'""'"'-20IWPQ4_RODIFI""'_ - -_"'TE LOC-.MXD - '-7'-2009 '-S:3S:27 CH2MHILL- ...-II.....-JECTSIRDDGISIWH ....- - _ FB - XDSITO2 - - "'- - ""'""'""' G- 2_2 SI""'-_- ... - ""'- 21 - - - - ---------- ­

• POL STORAGE YARD

(DISPOSAL AREA)

~

88

•

LEGENDr--SlTEUMrTS ROADS

POL STORAGE YARD MISCELlANEOUS SURFACE FEATURE

FORMER PESTICIDE STORAGE D BUILOINGS

N'PROXWIATE STOO<PILE MISCELLANEOUS ROAD FEATURE• E3 FENCES -fI8&- TOPOGAAPHIC CONTOUR AND ELEVATION

I N FIGURE 2-3

HISTORICAL SITE FEATURES STREAM CENTERLINE

RECORD OF DECISION WH ITEMAN AIR FORCE BASE, MISSOURI

CH2MHILLIILOKIIPROJECTSIRDDGISlWHITEMAN_AFBIMXDSIT0220IWP04_RODlFIG_2_3_HIST_SITE_ FEA T.MXD 2117/2009 15:55:26

•

•

• "'leo

SURFACE SOIL SCREENING LEVELS

r-- ECOLOGICALL _ J SITE LIMITS - Chloroane = 0.224 mglkQ

CONFIRMATION SURFACE SOIL HUMAN HEALTH - Chloroane = 48.9 mg.1<gSAMPLE LOCATION

SAMPLE LOCATION OP32-MW-10 SOIL CONCENTRATION (mg.1<g;----1.2 (7m) (4-6) TCE N SAMPLE COLLECTION (MONTHlYEAR) ------l J I SAMPLE (BEGINNING - ENDING) DEPTH ft (BGS) ANALYTE OR ANALYTE ABBREVIATION

1

FIGURE 2-4 CURRENT SITE WP-04 SURFACE SOIL RESULTS ABOVE THE SCREENING LEVEL RECORD OF DECISION WHITEMAN AIR FORCE BASE, MISSOURI

CH2MHILLIILOKIIPROJECTSIRDDGISIWHITEMAN_AFBIMXDSIT0220IWP04_RODIFIG_2_4_WP04_SS.MXD 211812009 09:18:45

• ~t Responsiveness Summary

The public comment period for the Proposed Plan began March 5 and ended on April 4, 2009. No comments were received on the Proposed Plan. The public availability session regarding Ih:? Proposed Plan was held on March 25, 2009. One person attended the public availability session, but no questions or comments were received.

3.1 Stakeholder Comments and Lead Agency ReslPonses None.

3.2 Technical and Legal Issues None.

MKEI091670001 3·1 WI-ITEMAN AIR F"ORCE BASE JUNE 2009

• 4. References

Black & Veatch, Engineering-Architects. 1989. IRP Phase Il- RI/FS Stage 2 -- Draft Report.

Black & Veatch, Engineering-Architects. 1991_ Illstallation Restoration Program (lRP) Stage 2, Remedial /nvl.'stigatioll/Feasibility Study, Final Report, Whiteman Air Force Base.. Kllo/J Noster, Missouri.

CH2M HILL. 2008. C01'~firmt1tory Surface Soil Sampling Resultsfor Pesticides al Site WP-04, Whitel/1an Air Force Base Technical MemorandulII.

CH2M HILL. 2009. Proposed Plan for Site WP-04 Envirollll/ental Restoration P"ogralll Site Whiteman Air Force Base, MO.

Engineering-Science. 1984. Phase I, Records Search Report.

0' Brien & Cere. 1997. Decisioll/C1osure DoculIlellt for the Lillt,d Soil Stockpile frolll Site WP-04 at Landfill No.5, Installation Restoration Progralll .

•

• MKE\091670001 4·1 WHITEMAN AIR FORCE BASE JUNE 2009