Aspectclients.aspectconsulting.com/W4/457-009_DRAFT_Pilot_Study_WP.pdf · Aspect Aspect Consulting...

April 28, 2017

Mr. Ed Jones Washington State Department of Ecology, NWRO 3190 160th Avenue SE Bellevue, Washington 98008-5452

Re: West of 4th Site Agreed Order #DE10402 Draft Conceptual Pilot Study Work Plan, Site Unit 2

Dear Mr. Jones:

Please find enclosed the Draft Conceptual Pilot Study Work Plan for Site Unit 2. This report was prepared by Farallon Consulting on behalf of the four potentially liable persons (PLPs) [Art Brass Plating, Blaser Die Casting, Capital Industries, and PSC Environmental Services, LLC] identified by Ecology in the Agreed Order #DE10402 for the West of 4th Site.

Sincerely,

Aspect consulting, LLC Dana Cannon, LHG W4 Project Coordinator [email protected]

Attachments: Draft CVOC Pilot Study Work Plan for Site Unit 2 S:\Art Brass Plating 050067\W4 Ecology Correspondence\Cover Letters\SU2CVOCWorkPlanDraft_Cover_042717.docx

DRAFT—Issued for Regulatory Review

CONCEPTUAL PILOT STUDY WORK PLAN

Site Unit 2 Seattle, Washington

Submitted by: Farallon Consulting, L.L.C. 975 5th Avenue Northwest

Issaquah, Washington 98027

Farallon PN: 457-009

For: West of 4th Avenue Group

Site Unit 2 Joint Deliverable Capital Industries, Inc. Blaser Die Casting Co.

Stericycle Seattle, Washington

April 27, 2017

Prepared by:

Jennifer L. Moore Associate Scientist

Reviewed by:

Jeffrey Kaspar, L.G., L.H.G. Principal Geologist


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TABLE OF CONTENTS

1.0 INTRODUCTION.............................................................................................. 1-1 1.1 OBJECTIVE ............................................................................................ 1-1 1.2 ORGANIZATION ................................................................................... 1-2

2.0 CONSTITUENTS OF CONCERN FOR PILOT STUDY ............................. 2-1

3.0 PRELIMINARY CLEANUP LEVELS ........................................................... 3-1

4.0 CONCEPTUAL SITE MODEL ....................................................................... 4-1 4.1 GEOLOGY .............................................................................................. 4-1

4.1.1 Fill Unit ........................................................................................ 4-1 4.1.2 Younger Alluvium ....................................................................... 4-1 4.1.3 Older Alluvium ............................................................................ 4-1

4.2 HYDROGEOLOGY ................................................................................ 4-2 4.3 NATURE AND EXTENT OF GROUNDWATER

CONTAMINATION................................................................................ 4-2 4.4 GROUNDWATER GEOCHEMISTRY .................................................. 4-3

5.0 PROPOSED PILOT STUDY ............................................................................ 5-1 5.1 REMEDIAL TECHNOLOGY................................................................. 5-1 5.2 UTILITY CLEARANCE ......................................................................... 5-1 5.3 MONITORING WELL INSTALLATION .............................................. 5-2 5.4 BASELINE GROUNDWATER SAMPLING ........................................ 5-3 5.5 PERMITTING ......................................................................................... 5-3 5.6 PILOT STUDY APPROACH.................................................................. 5-4 5.7 MONITORING ........................................................................................ 5-4

5.7.1 ZVI Injection Monitoring ............................................................ 5-5 5.7.2 Performance Monitoring .............................................................. 5-6

6.0 PILOT STUDY DOCUMENTATION ............................................................. 6-1 6.1 PROJECT DOCUMENTS AND REPORTING ...................................... 6-1

6.1.1 Field Implementation Work Plan ................................................. 6-1 6.1.2 Quarterly Status Reports .............................................................. 6-2 6.1.3 Annual Progress Report ............................................................... 6-2 6.1.4 Pilot Study Completion Report .................................................... 6-2

7.0 SCHEDULE AND REPORTING ..................................................................... 7-1

8.0 BIBLIOGRAPHY .............................................................................................. 8-1


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FIGURES Figure 1 Site Diagram

Figure 2 Groundwater Monitoring Well Locations

Figure 3 Pilot Study Area Detail

TABLES Table 1 Summary of Groundwater Analytical Results

Table 2 Summary of Preliminary Cleanup Levels

Table 3 Summary of Natural Attenuation and Water Quality Parameters


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ACRONYMNS AND ABBREVIATIONS

Aspect Aspect Consulting

BDC Blaser Die Casting Co.

bgs below ground surface

CI Capital Industries, Inc.

CVOCs chlorinated volatile organic compounds

Ecology Washington State Department of Ecology

EPA U.S. Environmental Protection Agency

Farallon Farallon Consulting, L.L.C.

Feasibility Study West of 4th Site Unit 2 Feasibility Study, Seattle, Washington

dated August 11, 2016, prepared by West of Fourth Group and

Pacific Groundwater Group

Fill Unit The shallow portion of the Younger Alluvium that has been

modified and comprises heterogeneous layers of gravelly sand,

silt, and silty sand with scattered inert anthropogenic debris such

as bricks and broken glass

Groundwater Monitoring Plan Technical memorandum regarding FINAL West of 4th

Groundwater Monitoring Program Plan 2017 through Draft

Cleanup Action Plan, W4 Joint Deliverable, Agreed Order No.

DE 10402 dated March 21, 2017, from Ms. Janet Knox of

Pacific Groundwater Group to Mr. Ed Jones of the Washington

State Department of Ecology

HASP Health and Safety Plan


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ISCR in-situ chemical reduction

PCE tetrachloroethene

PGG Pacific Groundwater Group

PLP potentially liable parties

PRB permeable reactive barrier

PSC PSC Environmental Services, LLC

Site The West of 4th Group Site consisting of Site Unit 1 and Site

Unit 2

Stericycle Burlington Environmental, LLC, is a wholly owned subsidiary

of PSC Environmental Services, LLC, which is a wholly owned

subsidiary of Stericycle Environmental Solutions, Inc.

SU1 Site Unit 1

SU2 Site Unit 2

TCE trichloroethene

WAC Washington Administrative Code

West of 4th Group Art Brass Plating, Inc.; Blaser Die Casting Co.; Capital

Industries, Inc.; and PSC Environmental Services, LLC

Work Plan Conceptual Pilot Study Work Plan, Site Unit 2, Seattle,

Washington dated April 27, 2017, prepared by Farallon

Consulting, L.L.C. (this document)

ZVI zero-valent iron


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1.0 INTRODUCTION

Farallon Consulting, L.L.C. (Farallon) has prepared this Conceptual Pilot Study Work Plan (Work

Plan) on behalf of Art Brass Plating, Inc.; Blaser Die Casting Co. (BDC); Capital Industries, Inc.

(CI); and Burlington Environmental, LLC1 (collectively referred to herein as the West of 4th

Group), which are the potentially liable parties (PLPs) at the West of 4th Group Site (herein referred

to as the Site). The Site consists of Site Unit 1 (SU1) and Site Unit 2 (SU2) as depicted on Figure

1. The Art Brass Plating, Inc. property is located at SU1. The CI and BDC properties are located

at SU2.

This Work Plan has been prepared in accordance with the requirements of Agreed Order No. DE

10402 entered into by the West of 4th Group and the Washington State Department of Ecology

(Ecology) in April 2014, and the Washington State Model Toxics Control Act Cleanup Regulation

as established in Chapter 173-340 of the Washington Administrative Code (WAC 173-340).

1.1 OBJECTIVE

The purpose of the Work Plan is to provide the general overview and framework for

implementation of an in-situ chemical reduction (ISCR) pilot study at SU2 as discussed in the West

of 4th Site Unit 2 Feasibility Study, Seattle, Washington dated August 11, 2016, prepared by West

of Fourth Group and Pacific Groundwater Group (PGG) (West of Fourth Group and PGG 2016)

(Feasibility Study). The ISCR technology that will be evaluated includes direct injection of zero-

valent iron (ZVI) into the subsurface to create a permeable reactive barrier (PRB) and treat affected

groundwater. The objectives of the pilot study include:

• Evaluate whether ISCR can reduce chlorinated volatile organic compound (CVOC)

concentrations in groundwater and eliminate the potential to affect the Lower Duwamish

Waterway;

1 Burlington Environmental, LLC, is a wholly owned subsidiary of PSC Environmental Services, LLC (PCS), which is a wholly owned subsidiary of Stericycle Environmental Solutions, Inc., hereafter referred to in this document as “Stericycle” for simplicity.



• Evaluate application of ISCR via direct injection to refine the understanding of whether

ZVI can be successfully distributed in the subsurface to create a PRB with the capability

to treat affected groundwater;

• Provide sufficient data regarding ISCR via direct injection to evaluate the feasibility of

applying injection-based technologies at SU2; and

• Provide information regarding injection-based technologies necessary to re-evaluate

cleanup alternatives presented in the Feasibility Study prior to preparation of the draft

Cleanup Action Plan.

1.2 ORGANIZATION

This Work Plan summarizes pertinent background information and provides context and a general

framework for the ISCR pilot study at SU2. This Work Plan is organized into the following

sections:

• Section 1, Introduction, presents an overview of the Site, the objectives, and the Work

Plan;

• Section 2, Constituents of Concern, presents the constituents of concern that will be

targeted during the pilot study;

• Section 3, Preliminary Cleanup Levels, presents the revised preliminary cleanup levels

for the Site that will be used to evaluate whether the remedial technology can meet the

cleanup objectives;

• Section 4, Conceptual Site Model, presents a description of the Site features, geology and

hydrogeology, nature and extent of contamination, and groundwater geochemistry;

• Section 5, Proposed Pilot Study, presents a description of the proposed pilot study,

including a discussion of the remedial technology, the pilot study approach, and operational

and performance monitoring programs;

• Section 6, Pilot Study Documentation, presents a description of documents that will be

generated to govern and report on pilot study activities;



• Section 7, Schedule and Reporting, summarizes the schedule for implementation of the

pilot study and associated reporting deliverables that will be submitted to Ecology; and

• Section 8, References, lists the documents cited in this Work Plan.



2.0 CONSTITUENTS OF CONCERN FOR PILOT STUDY

The pilot study is intended to demonstrate the effectiveness of an ISCR technology on reducing

concentrations of CVOCs in groundwater at the Site. The pilot study location is proximate to

monitoring well cluster CI-15 (Figures 2 and 3). Tetrachloroethene (PCE) and trichloroethene

(TCE) are not present in groundwater at this location and cis-1,2-dicloroethene has been detected

at low concentrations (Table 1). Vinyl chloride concentrations have remained elevated in

groundwater at a depth of approximately 50 feet below ground surface (bgs) (Table 1). Therefore,

the pilot study will evaluate the effectiveness of ISCR to reduce or eliminate vinyl chloride in

groundwater.



3.0 PRELIMINARY CLEANUP LEVELS

Preliminary cleanup levels for the Site are based on potential exposure pathways and were

established in the Revised Preliminary Cleanup Standards Memorandum, W4 Joint Deliverable,

Seattle, Washington dated September 12, 2014, from Farallon to Mr. Ed Jones of Ecology

(Farallon 2014). The preliminary cleanup levels were updated on January 17, 2017 to reflect

updates to human health criteria in the Clean Water Act promulgated by the U.S. Environmental

Protection Agency (EPA) on November 15, 2016.

Current preliminary cleanup levels for the Site are summarized in Table 2 of this Work Plan. An

objective of the pilot study will be to evaluate whether ISCR is able to reduce concentrations of

vinyl chloride to less than current preliminary cleanup levels.



4.0 CONCEPTUAL SITE MODEL

The following section presents a summary of the conceptual site model for the Site, including

descriptions of the geology, hydrogeology, nature and extent of contamination, and groundwater

geochemistry affecting the Site and the pilot study area.

4.1 GEOLOGY

The lithology of the Site has been subdivided into two alluvial units, the Younger Alluvium and

the Older Alluvium (Aspect Consulting [Aspect] 2014). The shallow portion of the Younger

Alluvium has been modified and is referred to in Site documents as the Fill Unit. A detailed

description of these units is provided below.

4.1.1 Fill Unit The Fill Unit comprises heterogeneous layers of gravelly sand, silt, and silty sand with scattered

inert anthropogenic debris such as bricks and broken glass. The Fill Unit is present at depths

between approximately 0 and 8 feet bgs. The boundary between the Fill Unit and the Younger

Alluvium can be difficult to distinguish.

4.1.2 Younger Alluvium The Younger Alluvium comprises channel and floodplain fluvial deposits associated with the

Duwamish River (Booth and Herman 1998). The Younger Alluvium consists of a sandy silt to

silty sand unit overlying a silty fine- to medium-grained sand unit. Scattered natural debris,

including wood and organic material, is present in the Younger Alluvium. The Younger Alluvium

extends to a depth of approximately 25 to 30 feet bgs on the eastern portion of the Site and to a

depth of approximately 55 feet bgs on western portions of the Site, proximate to the Duwamish

River.

4.1.3 Older Alluvium The Older Alluvium comprises deltaic and estuarine alluvial materials. The Older Alluvium

consists of interbedded silty fine sand and sandy silt. A silt aquitard and bedrock were identified

in deep borings advanced east of 4th Avenue South (PSC 2003). These units were not encountered

during drilling at the Site.



4.2 HYDROGEOLOGY

The PLPs for the Site refer to standardized hydrogeologic units in each of their documents that

correspond to the lithologic units that are described above (Aspect 2014). These hydrogeologic

units are:

• Water Table Interval: The Water Table Interval extends to a depth of up to 20 feet bgs;

• Shallow Interval: The Shallow Interval ranges in depth from 20 to 40 feet bgs; and

• Intermediate Interval: The Intermediate Interval includes groundwater monitored at the

Site at depths below 40 feet bgs.

Groundwater in these three hydrogeologic units flows west and southwest toward the Duwamish

River with little seasonal fluctuation. A downward vertical gradient is present between the Water

Table and Shallow Intervals. The vertical gradients between the Shallow and Intermediate

Intervals fluctuate between upward and downward in monitoring well clusters east of East

Marginal Way. The vertical gradient between the Shallow and Intermediate Intervals in

monitoring well clusters west of East Marginal Way, proximate to the Duwamish River, generally

are upward.

Tidal studies were documented in the remedial investigation reports for Art Brass Plating, Inc.

(Aspect 2012) and CI (Farallon 2012). Water levels at the Site are tidally influenced by Puget

Sound. This tidal influence is demonstrated in localized, transient flow reversals similar to those

observed at other sites in the vicinity of the Duwamish River. Tidal flow reversals diminish to 0.5

foot or less than 800 feet east-northeast of the Duwamish River.

4.3 NATURE AND EXTENT OF GROUNDWATER CONTAMINATION

CVOCs in groundwater, including PCE, TCE, and vinyl chloride, migrate from source areas to the

west in SU1 and to the southwest in SU2, parallel to the flow of groundwater toward the Duwamish

River. Vinyl chloride is present at concentrations exceeding preliminary cleanup levels in the

Shallow and Intermediate Intervals in the pilot study area. As previously stated, PCE and TCE

have not been detected in the Water Table, Shallow, or Intermediate Intervals in the pilot study

area. Based on the groundwater analytical data to date, CI, Stericycle, and BDC could be among



the sources of vinyl chloride concentrations in the Shallow Interval. The source for vinyl chloride

concentrations in the Intermediate Interval is undetermined, but is consistent with a source area

up-gradient of the pilot study area. The Stericycle property generally is accepted as contributing

low concentrations of vinyl chloride across SU1 and SU2.

The SU1 and SU2 PLPs currently are evaluating potential locations of elevated vinyl chloride

present at the pilot study area and an area further north at monitoring well cluster CG-141. The

collective SU1 and SU2 remedial investigation results are being reviewed again to determine

whether the source of vinyl chloride is associated with the existing PLP source areas or a potential

unidentified orphan site. Additional investigation work may be conducted prior to implementing

the pilot study to confirm the source(s) of the elevated vinyl chloride. This information will be

used to refine the conceptual site model for the elevated vinyl chloride and to confirm the PLPs

that will participate in the pilot study and future cleanup activities, if needed.

4.4 GROUNDWATER GEOCHEMISTRY

The groundwater at the Site generally is an anaerobic environment conducive to reductive

dechlorination of CVOCs via microbial biodegradation. The Water Table Interval is overall the

least reducing of the groundwater intervals, whereas reducing conditions increase with depth. PCE

and TCE are readily reduced to their daughter products: cis-1,2-dichloroethene; trans-1,2-

dichlorethene; vinyl chloride; and ethene (Aspect 2014). Both cis-1,2-dichloroethene and vinyl

chloride have been detected in monitoring well cluster CI-15, but only vinyl chloride has been

detected at concentrations exceeding preliminary cleanup levels (Table 2). Ethene, while not a

constituent of concern, is an indicator of complete reductive dechlorination of PCE or TCE.

Ethene concentrations in monitoring well cluster CI-15 are elevated (Table 3) relative to most

other areas of the Site, indicating that biodegradation processes are prevalent at this location.

ISCR is expected to create a more highly reducing environment that will accelerate the rate of

biodegradation. ISCR also reacts chemically with CVOCs, resulting in abiotic destruction of these

compounds. Groundwater geochemistry will be monitored during the pilot study to evaluate the

biotic and abiotic changes and corresponding effect on CVOCs present.



5.0 PROPOSED PILOT STUDY

This section presents a description of the pilot study, including a discussion of the remedial

technology, the pilot study approach, and operational and performance monitoring programs.

5.1 REMEDIAL TECHNOLOGY

The remedial technology chosen for this pilot study is ISCR using ZVI. ZVI will add an abiotic

component to CVOC degradation at the Site and create a reductive environment that will enhance

the ongoing microbial biodegradation of CVOCs. The ZVI will be injected into a linear series of

up to 10 injection points to form a PRB to treat groundwater (Figure 3). Groundwater is treated

as it flows through the PRB. The PRB will neither reduce CVOC concentrations up-gradient of

the pilot study area nor affect existing vinyl chloride down-gradient of monitoring well cluster CI-

15. ZVI will not travel significantly beyond the injection radius with the flow of groundwater,

and is a technology that relies on CVOCs in groundwater to be in contact with the ZVI for

sufficient time to allow the chemical reduction reaction to occur and reduce or eliminate CVOCs.

Effectiveness of ISCR will be evaluated through assessment of the physical distribution of the ZVI

in the subsurface in a manner that successfully creates a PRB capable of effectively reducing

concentrations of CVOCs. This will be accomplished through advancement of post-injection

borings in the PRB area to physically observe the distribution of ZVI. The second measure of

effectiveness of ISCR will be reduction in CVOC concentrations within a reasonable time frame

following establishment of the PRB. This will be accomplished using the existing monitoring

wells CI-15-40 and CI-15-60 supplemented with two additional monitoring wells screened within

the Intermediate Interval. In addition to monitoring CVOC concentrations, groundwater

geochemical parameters will be monitored for evidence of chemical changes in water quality and

evidence of increased biodegradation.

5.2 UTILITY CLEARANCE

Public and private utility locating services will be contracted to clear the proposed performance

monitoring well and ZVI injection point locations prior to drilling and well installation activities.

Information pertaining to the locations of subsurface utilities will be documented for future



reference. Drilling locations may be modified as necessary during field activities based on access

considerations and the locations of utilities and other features.

5.3 MONITORING WELL INSTALLATION

Access to the Jack in the Box property down-gradient of the proposed PRB is necessary to install

two performance monitoring wells to monitor the effectiveness of ISCR treatment and to track the

influence of the ZVI following injection (Figure 3). Ecology will assist in acquiring access to

areas required to conduct the pilot study. If access to the Jack in the Box property cannot be

obtained, an alternative pilot study location may be selected. However, the conceptual approach

presented herein will remain the same.

A drilling contractor licensed in the state of Washington will be subcontracted to advance the

borings and install two performance monitoring wells to depths up to 65 feet bgs. These borings

will be advanced using a track-mounted sonic drill rig. Sonic drilling is preferential because the

drilling method is easier to mitigate heaving sand conditions that impact well installation in this

area. Further, sonic drilling allows for a better soil sampling process for observing subtle changes

in the soil matrix that may affect the distribution of ZVI and transport of CVOCs.

Soil samples will be collected continuously below a depth of 30 feet bgs during advancement of

the borings to examine continuous cores and refine understanding of local geology that could affect

the pilot study. Subsurface conditions will be documented on boring logs, and soil samples from

selected intervals may be retained for CVOC analysis for waste profiling needs or to refine future

cleanup activities. The information recorded on the boring logs will include soil types, visual and

olfactory evidence of the potential presence of contaminants, depth to groundwater, and volatile

organic vapor concentrations as measured using a photoionization detector.

Monitoring wells will be installed at target depths of 55 and 65 feet bgs, respectively. The

monitoring wells will be constructed using 2-inch-diameter Schedule 40 polyvinyl chloride casing

with a 5-foot section of 0.010-inch slotted screen. The target depths for the monitoring well

screens are approximately 50 to 55 feet bgs and 60 to 65 feet bgs where the highest anticipated

vinyl chloride concentrations are present. The monitoring wells will be completed with 8-inch-



diameter well monuments mounted flush with the surrounding grade. Each monitoring well will

be developed immediately following installation.

5.4 BASELINE GROUNDWATER SAMPLING

The newly installed monitoring wells will be allowed to recover for 48 hours prior to conducting

baseline groundwater sampling. Baseline groundwater samples will be collected from the two

newly installed monitoring wells and the existing monitoring wells, CI-15-40 and CI-15-60. The

groundwater sampling will be conducted in general accordance with standard procedures cited in

the technical memorandum regarding FINAL West of 4th Groundwater Monitoring Program Plan

2017 through Draft Cleanup Action Plan, W4 Joint Deliverable, Agreed Order No. DE 10402

dated March 21, 2017, from Ms. Janet Knox of PGG to Mr. Jones of Ecology (PGG 2017)

(Groundwater Monitoring Plan). The groundwater samples will be submitted to a Washington-

accredited laboratory for analysis of:

• CVOCs by EPA Method 8260C;

• Sulfate by American Society for Testing and Materials Method D516-07;

• Methane, ethane, and ethene by EPA Method RSK 175; and

• Dehalococcoides microbial populations by laboratory-specific DNA testing methods.

Farallon will also measure ferrous iron concentrations directly in the field using a field test kit.

Additional geochemical parameters that will be directly measured during sample collection using

field instrumentation will include temperature, pH, dissolved oxygen, oxidation-reduction

potential, and specific conductance. The geochemical parameters cited above represent the key

parameters that will be used to evaluate abiotic and biotic activity throughout the pilot study.

5.5 PERMITTING

Farallon will work with the Seattle Department of Transportation to obtain a street use permit for

implementation of ISCR in the 1st Avenue South right-of-way. A traffic control service will be

contracted to prepare a traffic control plan for the pilot study area and to provide lane closure

signage and flaggers, as needed, due to the arterial nature of 1st Avenue South.



Farallon will complete the Ecology underground injection control program registration process as

required by the Underground Injection Control Program (WAC 173-218) to register the ZVI

injection points as EPA Type 5B6 Class V injection wells for the purpose of improving

groundwater quality at a cleanup site. The underground injection control program registration

form and required supporting documentation will be submitted to Ecology for review and approval

prior to injection of the ZVI.

5.6 PILOT STUDY APPROACH

The pilot study will be implemented in 1st Avenue South proximate to monitoring well cluster CI-

15 (Figure 3). The PRB will be oriented across the 1st Avenue South right-of-way at a

perpendicular (90 degree) angle with the flow of groundwater. Microscale ZVI will be mixed at

the Site with injection additives to suspend and distribute ZVI at each of the injection points. A

drilling and injection contractor with experience using ISCR will mix and inject the ZVI slurry at

the pilot study area. The ZVI slurry will be injected under high pressure and high flow in 2.5-foot

lifts to form the PRB at depths ranging from approximately 45 to 65 feet bgs, corresponding with

the depths of highest vinyl chloride concentration detections. The injection points will be spaced

on 10-foot centers with an estimated radius of influence of 10 feet (Figure 3).

A conservative (i.e., non-reactive) dye tracer will be mixed with the ZVI slurry to assess

distribution of ZVI in the subsurface and to monitor the movement of groundwater during the

performance monitoring period.

Dosing of the ZVI slurry and the conservative dye tracer will be calculated and presented in the

planned Field Implementation Work Plan to be submitted to Ecology after key administrative

milestones pertaining to the pilot study design have been achieved. The pilot study period,

including injection and formation of the PRB and subsequent performance monitoring, is expected

to comprise 2 years of pilot study activities.

5.7 MONITORING

ZVI injection and post-ZVI injection performance monitoring will be used to monitor the ZVI

injection as it is occurring and the effectiveness of ISCR over up to a 2-year monitoring period,



which will be dependent upon performance monitoring results. The monitoring work that will be

conducted is described in the sections herein.

5.7.1 ZVI Injection Monitoring The drilling and injection contractor will monitor the injection rate and pressure at each injection

point continuously to minimize fracturing and development of preferential pathways in the soil

matrix during injection. The total volume of ZVI slurry that is injected at each injection point will

be documented to facilitate evaluation of the technology and potential future application of ISCR.

The ZVI slurry mixture will be sampled during the injection process to verify the dosing of the

ZVI mixture that was injected to form the PRB is consistent with design parameters.

Water levels and geochemical parameters, including but not limited to dissolved oxygen, oxidation

reduction potential, ferrous iron, and specific conductance, will be monitored at the closest

monitoring wells to the injection location, monitoring well cluster CI-15. The monitoring results

may be indicative of the radius of influence of the injections, potential preferential pathways within

the soil matrix, or other factors that may be considered if the technology is applied in other areas

of the Site or at SU2. The monitoring well cluster and other performance monitoring wells will

also be monitored during injection and post-injection for evidence of the conservative tracer.

Up to five direct-push borings will be advanced within and on the northern and southern sides of

the PRB approximately 2 weeks after injection of the ZVI slurry has been completed to assess the

distribution of the ZVI slurry within the soil matrix (Figure 3). The distance of these observation

borings from the PRB may be adjusted as follows to assess the radius of influence of the ZVI

injections.

The first observation boring will be advanced approximately 10 feet from the PRB to assess the

radius of injection of the ZVI slurry. If ZVI and the conservative dye tracer are not observed in

this observation boring, then the next observation boring will be advanced at a distance closer to

the PRB. If physical evidence of ZVI and the conservative dye tracer is observed in the first

observation boring, then the next observation boring will be advanced at approximately 15 feet

from the PRB to assess whether the ZVI injection achieved a greater radius of influence than

originally estimated. One observation boring will be advanced within the PRB to assess the



distribution of ZVI and potential for preferential distribution. The observation borings will be

advanced to a depth of at least 65 feet bgs. The actual depths and locations of borings will be

based on field observations.

5.7.2 Performance Monitoring Post-injection performance monitoring will include quarterly groundwater sampling of the two

newly installed performance monitoring wells and existing monitoring wells CI-15-40 and CI-15-

60 for the first year to assess the effectiveness of ISCR to increase the rate of vinyl chloride

reduction via abiotic and biotic processes.

The groundwater sampling will be conducted in general accordance with standard procedures cited

in the Groundwater Monitoring Plan. The groundwater samples will be submitted to a

Washington-accredited laboratory for analysis for:

• CVOCs by EPA Method 8260C;

• Sulfate by American Society for Testing and Materials Method D516-07; and

• Methane, ethane, and ethene by EPA Method RSK 175.

Dehalococcoides microbial populations will be assessed annually to determine whether the ISCR

treatment is also increasing the potential for biodegradation. Farallon will also measure ferrous

iron concentrations directly in the field using a field test kit. Additional geochemical parameters

that will be directly measured during sample collection using field instrumentation will include

temperature, pH, dissolved oxygen, oxidation-reduction potential, and specific conductance.

Performance monitoring samples will also be visually screened in the field for evidence of the

presence of the conservative dye tracer to evaluate local groundwater flow direction and

groundwater flow rate proximate to the pilot study area.

The baseline sampling event and subsequent four quarterly groundwater sampling events will be

evaluated to determine whether sufficient data is available to conclude that ISCR has the potential

to reduce vinyl chloride concentrations. Ecology will be provided an Annual Progress Report as

described under Section 6, Pilot Study Documentation. If necessary, the pilot study will continue

for a second year. Performance groundwater sampling will be conducted semiannually in the



second year, coinciding with the standard March and September Site groundwater monitoring

program. The pilot study will conclude following the second year of performance groundwater

sampling.



6.0 PILOT STUDY DOCUMENTATION

This section summarizes the pilot study documents that will be generated during the pilot study

activities.

6.1 PROJECT DOCUMENTS AND REPORTING

6.1.1 Field Implementation Work Plan A Field Implementation Work Plan for the pilot study will be submitted to Ecology following

Ecology approval of this Work Plan and confirmation that access to the Jack in the Box property

and 1st Avenue South can be acquired to conduct the pilot study. The Field Implementation Work

Plan will provide details regarding implementation of the pilot study, including: the final pilot

study location; ZVI injection design criteria; performance monitoring details; criteria for

evaluating effectiveness of the pilot study; and reporting requirements. The Field Implementation

Work Plan will also include the supporting documents that follow.

6.1.1.1 Sampling and Analysis Plan

The Field Implementation Work Plan will include a Sampling and Analysis Plan to guide

the sampling efforts associated with the pilot study. The Sampling and Analysis Plan will

include a discussion of sample locations and frequency to establish baseline groundwater

conditions prior to the pilot study and monitor the effectiveness of the pilot study for up to

2 years following injection of the ZVI.

The Sampling and Analysis Plan will include standard operating procedures related to the

specific field tasks that will be performed during the pilot study. These standard operating

procedures may include: field sampling and documentation; soil sampling; monitoring

well installation/construction; groundwater sampling procedures; and waste management.

6.1.1.2 Quality Assurance Project Plan

The Field Implementation Work Plan will include a Quality Assurance Project Plan to

assess the quality and reproducibility of analytical data generated in association with the

pilot study. The Quality Assurance Project Plan will also discuss quality assurance/quality

control samples that will be collected to support the pilot study.



6.1.1.3 Health and Safety Plan

The Field Implementation Work Plan will include a Health and Safety Plan (HASP)

required for all field activities in accordance with WAC 173-340-810. The HASP will

comply with the requirements of the Occupational Safety and Health Act of 1970 and the

Washington Industrial Safety and Health Act (Chapter 49.17 of the Revised Code of

Washington).

6.1.2 Quarterly Status Reports Quarterly status will be submitted to Ecology in the standard Quarterly Progress Reports prepared

for each SU2 PLP. The Quarterly Progress Reports will include a summary of the performance

monitoring results as the pilot study progresses.

6.1.3 Annual Progress Report An Annual Progress Report will be submitted to Ecology to document overall progress during the

first year of the pilot study and evaluate whether continuing a second year is necessary to meet the

pilot study objectives. The first Annual Progress Report will provide details on the implementation

of the pilot study, provide a summary of the first year of performance monitoring data, and discuss

work planned for the second year of the pilot study, if necessary.

6.1.4 Pilot Study Completion Report The Pilot Study Completion Report will be submitted to Ecology following the conclusion of the

2-year pilot study, and will include a summary of the overall pilot study results and conclusions.

The Pilot Study Completion Report will summarize the effectiveness of ISCR in increasing the

rate at which vinyl chloride concentrations are reduced, and will include conclusions regarding the

effects of ISCR on biotic activities. The Pilot Study Completion Report also will discuss whether

and how implementation of the technology can be achieved at other areas.



7.0 SCHEDULE AND REPORTING

This section summarizes the schedule for implementation of the pilot study and associated

reporting deliverables that will be produced. The milestones associated with implementation of

the pilot study and the potential schedule to achieve those milestones is provided below.

Deliverables Anticipated Schedule

Submittal of Work Plan April 28, 2017

Submittal of Field Implementation Work Plan Within 45 days of confirmation of access to

the Jack in the Box property and 1st Avenue

South.

Submittal of Quarterly Progress Reports Each quarter following implementation of

the pilot study.

Submittal of Annual Progress Report Within 30 days following receipt of

performance monitoring results for the

fourth quarterly sampling event at the

conclusion of the first year of the pilot

study.

Submittal of Pilot Study Completion Report Within 30 days following receipt of the final

performance monitoring sampling event

results for the second year of the pilot study.

Field Work Anticipated Schedule

Permits and Access Agreements Initiated upon Ecology approval of the

Work Plan.

Performance Monitoring Well Installation Within 30 day of approval of Field

Implementation Work Plan.



Baseline Groundwater Monitoring Event Within 2 weeks following installation of

new performance monitoring wells.

ZVI Injection/PRB Formation To be scheduled upon Ecology approval of

the Field Implementation Work Plan, and

following receipt of applicable street use

and injection permits and review of the

baseline groundwater monitoring event.

Advancement of Observation Borings Within 2 weeks following completion of the

ZVI injection and PRB formation.

Initial Year of Performance Monitoring Initial quarterly groundwater monitoring

event to be conducted within 90 days of ZVI

injection. Subsequent three events to be

conducted quarterly thereafter.

Second Year of Performance Monitoring To be initiated following Ecology review of

Annual Progress Report and consensus that

pilot study should continue for a second

year.



8.0 BIBLIOGRAPHY

Aspect Consulting (Aspect). 2012. Remedial Investigation Report, Art Brass Plating. Prepared

for Art Brass Plating, Inc. September 27.

______. 2014. Memorandum Regarding Site Conceptual Model Technical Memorandum

(Revised), W4 Joint Deliverable. From Aspect Consulting, LLC. To Ed Jones,

Washington State Department of Ecology. December 15.

Booth, D.B., and L. Herman. 1998. Duwamish Basin Groundwater Pathways Conceptual Model

Report. City of Seattle, Office of Economic Development.

Farallon Consulting, L.L.C. (Farallon). 2012. Revised Draft Remedial Investigation Report,

Capital Industries, Inc., 5801 3rd Avenue South, Seattle, Washington, Agreed Order No. E

5348. Prepared for Capital Industries, Inc. October.

______. 2014. Technical Memorandum Regarding Revised Preliminary Cleanup Standards

Memorandum, W4 Joint Deliverable, Seattle, Washington. From Farallon. To Ed Jones,

Washington State Department of Ecology. September 12.

Pacific Groundwater Group (PGG). 2006. Blaser Die Casting Soil and Groundwater

Investigation Report. October 30.

———. 2007. Blaser Die Casting Pilot Source Control Action Plan. April 10.

———. 2008. Status Report, Blaser Die Casting, 5700 Third Avenue South, Seattle, Washington.

June.

———. 2017. Technical Memorandum regarding FINAL West of 4th Groundwater Monitoring

Program Plan 2017 through Draft Cleanup Action Plan, W4 Joint Deliverable, Agreed

Order No. DE 10402. From Janet Knox. To Ed Jones, Washington State Department of

Ecology. March 21.

PSC Environmental Services, Inc. (PSC). 2003. Final Comprehensive Remedial Investigation

Report for Philip Services Corporation’s Georgetown Facility. November 14.



West of Fourth Group and Pacific Groundwater Group (West of Fourth Group and PGG). 2016.

West of 4th Site Unit 2 Feasibility Study, Seattle, Washington. August 11.


P:\457 Capital Indust\457009 West of 4th - W4 PLP Group\Reports\Pilot Study WP\457-009 DRAFT Pilot Study WP.docx

FIGURES

CONCEPTUAL PILOT STUDY WORK PLAN Site Unit 2

Seattle, Washington


CONSULTING

Checked By: JK Disc Reference:

SITE DIAGRAMWEST OF 4TH AVENUE GROUP

SITE UNIT 2SEATTLE, WASHINGTON

Quality Service for Environmental Solutions | farallonconsulting.com

Farallon

WashingtonIssaquah | Bellingham | Seattle

OregonPortland | Bend | Baker City

CaliforniaOakland | Sacramento | Irvine

Date: 4/27/2017Drawn By: tperrinDocument Path: Q:\Projects\457 CapitalIndust\009 Feasibility\Figure1_FeasPilotArea_Sitemap.mxd

FARALLON PN: 457-009

DRAFT

G ART BRASS PLATING, INC.

G BLASER DIE CASTING CO.

G

CAPITAL INDUSTRIES, INC.

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SITE UNIT #1(SU1)

SITE UNIT #2(SU2)

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

FIGURE 1

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SCALE IN FEET

ART BRASS PLATING, INC.

BLASER DIE CASTING CO.


STERICYCLE ENVIRONMENTAL SOLUTIONS, INC.

SITE UNIT BOUNDARY

LEGEND

CONSULTING


GROUNDWATER MONITORING WELL LOCATIONSWEST OF 4TH AVENUE GROUP



Farallon




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FARALLON PN: 457-009

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LEGEND

NOTE: COLOR IS USED ON THE MAP AND MAY NOT REPRODUCE IN BLACK AND WHITE.

CONSULTING


PILOT STUDY AREA DETAILWEST OF 4TH AVENUE GROUP



Farallon




Date: 4/26/2017Drawn By: tperrinDocument Path: Q:\Projects\457 CapitalIndust\009 Feasibility\Figure6_su2_pilotdetail.mxd

FARALLON PN: 457-009DRAFT

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LEGEND


P:\457 Capital Indust\457009 West of 4th - W4 PLP Group\Reports\Pilot Study WP\457-009 DRAFT Pilot Study WP.docx

TABLES

CONCEPTUAL PILOT STUDY WORK PLAN Site Unit 2

Seattle, Washington


Table 1Summary of Groundwater Analytical Results

Site Unit 2Seattle, Washington


P:\457 Capital Indust\457009 West of 4th - W4 PLP Group\Reports\Pilot Study WP\Tables\457-009 Pilot Study WP tables

1 of 9 DRAFT -- Issued for Regulatory Review

CG-137-40-031513 CG-137-WT 3/15/2013 < 0.40 39 40 7.2 0.49CG-137-WT-080813 CG-137-WT 8/8/2013 < 0.20 38 38 9.2 0.77CG-137-WT-031314 CG-137-WT 3/13/2014 < 0.20 31 48 9.0 0.86CG-137-WT-092414 CG-137-WT 9/24/2014 < 0.40 28 54 9.2 0.73CG-137-WT-031815 CG-137-WT 3/18/2015 < 0.40 16 57 9.0 0.96CG-137-WT-092415 CG-137-WT 9/24/2015 < 0.40 14 60 8.7 0.61CG-137-WT-032316 CG-137-WT 3/23/2016 < 0.40 7.2 86 9.0 2.3CG-137-WT-092116 CG-137-WT 9/21/2016 < 0.40 7.5 98 10 0.67CI-10-WT-031413 CI-10-WT 3/14/2013 < 0.40 56 21 1.1 < 0.40CI-10-WT-080713 CI-10-WT 8/7/2013 < 0.40 50 25 1.4 < 0.40CI-10-WT-031314 CI-10-WT 3/13/2014 < 0.20 38 12 0.61 < 0.20CI-10-WT-092414 CI-10-WT 9/24/2014 < 0.40 38 51 1.6 < 0.40CI-10-WT-031815 CI-10-WT 3/18/2015 < 0.40 46 57 1.4 < 0.40CI-10-WT-092215 CI-10-WT 9/22/2015 < 0.40 40 72 1.8 < 0.40CI-10-WT-032416 CI-10-WT 3/24/2016 < 0.20 23 12 0.42 < 0.20CI-10-WT-092116 CI-10-WT 9/21/2016 < 0.40 31 81 2.3 < 0.40CI-10-WT-032917 CI-10-WT 3/29/2017 < 0.20 24 34 1.2 0.23CI-11-WT-031313 CI-11-WT 3/13/2013 < 0.20 < 0.20 0.22 < 0.20 0.64CI-11-WT-031214 CI-11-WT 3/12/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-11-WT-032316 CI-11-WT 3/23/2016 < 0.20 < 0.20 0.22 < 0.20 0.61CI-12-WT-031413 CI-12-WT 3/14/2013 < 0.20 0.31 0.59 < 0.20 2.9CI-12-WT-031114 CI-12-WT 3/11/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-12-WT-031715 CI-12-WT 3/17/2015 < 0.20 0.39 0.26 < 0.20 < 0.20

-- CI-12-WT 3/22/2016CI-13-WT-031313 CI-13-WT 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-13-WT-080613 CI-13-WT 8/6/2013 < 0.20 < 0.20 1.3 < 0.20 < 0.20CI-13-WT-110514 CI-13-WT 11/5/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-13-WT-092315 CI-13-WT 9/23/2015 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-13-WT-092016 CI-13-WT 9/20/2016 < 0.20 0.21 1.3 < 0.20 < 0.20

DUP-1-092016 CI-13-WT 9/20/2016 < 0.20 < 0.20 1.1 < 0.20 < 0.20CI-13-WT-032817 CI-13-WT 3/28/2017 < 0.20 < 0.20 1.3 < 0.20 < 0.20CI-14-WT-031413 CI-14-WT 3/14/2013 < 0.20 0.98 0.77 < 0.20 < 0.20CI-14-WT-080613 CI-14-WT 8/6/2013 < 0.20 1.7 1.2 < 0.20 < 0.20

DUP-1-080613 CI-14-WT 8/6/2013 < 0.20 1.4 0.92 < 0.20 < 0.20CI-14-WT-031214 CI-14-WT 3/12/2014 < 0.40 3.2 81 0.97 0.61CI-14-WT-092414 CI-14-WT 9/24/2014 < 0.20 7.4 34 0.55 0.25CI-14-WT-031715 CI-14-WT 3/17/2015 < 0.40 8.2 66 0.83 0.78CI-14-WT-092215 CI-14-WT 9/22/2015 < 0.20 4.8 3.7 < 0.20 < 0.20CI-14-WT-032316 CI-14-WT 3/23/2016 < 0.20 2.8 4.1 0.21 < 0.20CI-14-WT-092016 CI-14-WT 9/20/2016 < 0.20 4.1 13 0.5 < 0.20CI-14-WT-032817 CI-14-WT 3/28/2017 < 0.20 3.0 8.2 0.38 < 0.20

116 3 6.9 3 NR 4 559 3 1.3 3

Not Sampled - Well Inaccessible

Water Table Zone

Sample Identification Sample Location Date

Analytical Results (micrograms per liter)1

PCE TCEcis-1,2-

Dichloroethenetrans-1,2-

Dichloroethene Vinyl Chloride

Preliminary Cleanup Levels-Water Table Zone

Water Table Zone








PCE TCEcis-1,2-


Dichloroethene Vinyl ChlorideCI-16-WT-031513 CI-16-WT 3/15/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-16-WT-031214 CI-16-WT 3/12/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-16-WT-032316 CI-16-WT 3/23/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-17-WT-031313 CI-17-WT 3/13/2013 2.7 2.3 1.0 < 0.20 0.37CI-17-WT-080613 CI-17-WT 8/6/2013 1.9 2.0 4.7 < 0.20 0.99CI-17-WT-031114 CI-17-WT 3/11/2014 9.6 1.7 2.1 < 0.20 0.78CI-17-WT-110514 CI-17-WT 11/5/2014 7.0 2.6 3.9 < 0.20 2.6CI-17-WT-031715 CI-17-WT 3/17/2015 3.2 3.0 2.5 < 0.20 1.3CI-17-WT-092315 CI-17-WT 9/23/2015 3.7 2.4 5.8 < 0.20 3.2CI-17-WT-032216 CI-17-WT 3/22/2016 7.1 4.0 2.7 < 0.20 0.95CI-17-WT-092016 CI-17-WT 9/20/2016 < 0.20 0.24 2.1 < 0.20 0.67CI-17-WT-032817 CI-17-WT 3/28/2017 9.1 2.1 2.5 < 0.20 0.94CI-18-WT-031313 CI-18-WT 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-18-WT-031114 CI-18-WT 3/11/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-18-WT-032216 CI-18-WT 3/22/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-18-WT-032817 CI-18-WT 3/28/2017 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-19-WT-031413 CI-19-WT 3/14/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-19-WT-031114 CI-19-WT 3/11/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-19-WT-032216 CI-19-WT 3/22/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-19-WT-033017 CI-19-WT 3/30/2017 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-9-WT-031313 CI-9-WT 3/13/2013 2.7 21 2.3 < 0.20 < 0.20CI-9-WT-080713 CI-9-WT 8/7/2013 3.9 22 2.5 < 0.20 < 0.20CI-9-WT-031214 CI-9-WT 3/12/2014 3.5 26 2.3 < 0.20 < 0.20CI-9-WT-092314 CI-9-WT 9/23/2014 6.3 23 0.96 < 0.20 < 0.20CI-9-WT-031715 CI-9-WT 3/17/2015 3.8 22 2.2 < 0.20 < 0.20CI-9-WT-092315 CI-9-WT 9/23/2015 4.1 26 2.9 < 0.20 < 0.20CI-9-WT-032316 CI-9-WT 3/23/2016 2.7 19 3.0 < 0.20 < 0.20CI-9-WT-092016 CI-9-WT 9/20/2016 3.8 24 3.1 < 0.20 < 0.20CI-9-WT-032917 CI-9-WT 3/29/2017 9.6 34 3.4 < 0.20 < 0.20

MW-2-031915 MW-2 3/19/2015 < 0.40 17 72 4.4 1.1MW-2-092415 MW-2 9/24/2015 < 0.40 7.4 91 4.7 1.5MW-2-032316 MW-2 3/23/2016 < 1.0 12 110 5.9 1.5MW-2-092216 MW-2 9/22/2016 < 1.0 < 1.0 92 4.4 1.1MW-2-032917 MW-2 3/29/2017 < 0.20 26 24 4.4 < 0.20MW-3-031815 MW-3 3/18/2015 < 0.20 4.3 28 0.40 0.37MW-3-032316 MW-3 3/23/2016 < 0.20 5.4 22 0.38 0.25MW-3-032917 MW-3 3/29/2017 < 0.20 3.2 6.0 < 0.20 < 0.20

116 3 6.9 3 NR 4 559 3 1.3 3Preliminary Cleanup Levels-Water Table Zone








PCE TCEcis-1,2-



MW-4-031313 MW-4 3/13/2013 < 0.20 1.7 1.1 < 0.20 < 0.20MW-4-080813 MW-4 8/8/2013 0.22 1.7 1.8 < 0.20 < 0.20MW-4-031314 MW-4 3/13/2014 < 0.20 1.3 1.1 < 0.20 < 0.20MW-4-092414 MW-4 9/24/2014 < 0.20 0.90 0.61 < 0.20 < 0.20MW-4-031715 MW-4 3/17/2015 < 0.20 0.88 0.46 < 0.20 < 0.20MW-4-092315 MW-4 9/23/2015 < 0.20 1.3 1.3 < 0.20 < 0.20MW-4-032416 MW-4 3/24/2016 < 0.20 0.97 0.68 < 0.20 < 0.20MW-4-092216 MW-4 9/22/2016 < 0.20 0.97 0.61 < 0.20 < 0.20MW-5-031815 MW-5 3/18/2015 < 0.40 50 32 0.87 1.4MW-5-032216 MW-5 3/22/2016 < 0.40 45 24 0.66 0.88MW-6-031915 MW-6 3/19/2015 6.8 3.2 < 0.20 < 0.20 < 0.20MW-6-032216 MW-6 3/22/2016 6.1 1.9 < 0.20 < 0.20 < 0.20MW-6-033017 MW-6 3/30/2017 5.3 2.6 0.29 < 0.20 < 0.20MW-7-031313 MW-7 3/13/2013 21 14 2.9 < 0.20 < 0.20MW-7-080813 MW-7 8/8/2013 8.6 4.6 4.7 < 0.20 < 0.20MW-7-031214 MW-7 3/12/2014 21 12 2.8 < 0.20 < 0.20MW-7-092314 MW-7 9/23/2014 11 5.5 3.3 < 0.20 0.20MW-7-031715 MW-7 3/17/2015 13 8.7 4.3 < 0.20 0.25MW-7-092315 MW-7 9/23/2015 12 4.6 3.1 < 0.20 0.74MW-7-032216 MW-7 3/22/2016 30 20 1.4 < 0.20 < 0.20MW-7-092016 MW-7 9/20/2016 8.8 4.7 2.4 < 0.20 0.23

CI-MW-7-032917 MW-7 3/29/2017 15 10 1.5 < 0.20 < 0.20116 3 6.9 3 NR 4 559 3 1.3 3

Water Table Zone

Preliminary Cleanup Levels-Water Table Zone








PCE TCEcis-1,2-



CG-137-WT-031513 CG-137-40 3/15/2013 < 0.40 < 0.40 < 0.40 < 0.40 46CG-137-40-080813 CG-137-40 8/8/2013 < 0.40 < 0.40 < 0.40 < 0.40 46CG-137-40-031314 CG-137-40 3/13/2014 < 0.20 0.38 0.61 < 0.20 47CG-137-40-092414 CG-137-40 9/24/2014 < 0.40 < 0.40 < 0.40 < 0.40 49CG-137-40-031815 CG-137-40 3/18/2015 < 0.40 < 0.40 < 0.40 < 0.40 57CG-137-40-092415 CG-137-40 9/24/2015 < 0.40 < 0.40 < 0.40 < 0.40 42CG-137-40-032316 CG-137-40 3/23/2016 < 0.40 < 0.40 < 0.40 < 0.40 50CG-137-40-092216 CG-137-40 9/22/2016 < 0.40 < 0.40 < 0.40 < 0.40 34CG-141-40-031413 CG-141-40 3/14/2013 < 1.0 < 1.0 < 1.0 < 1.0 120CG-141-40-080713 CG-141-40 8/7/2013 < 1.0 < 1.0 1.0 < 1.0 170CG-141-40-031314 CG-141-40 3/13/2014 < 1.0 < 1.0 1.2 < 1.0 150CI-141-40-092314 CG-141-40 9/23/2014 < 1.0 < 1.0 1.0 < 1.0 170CG-141-40-031815 CG-141-40 3/18/2015 < 1.0 < 1.0 1.3 < 1.0 160CG-141-40-092315 CG-141-40 9/23/2015 < 1.0 < 1.0 1.4 < 1.0 190CG-141-40-032416 CG-141-40 3/24/2016 < 0.20 < 0.20 0.35 < 0.20 20CG-141-40-092116 CG-141-40 9/21/2016 < 1.0 < 1.0 2.1 < 1.0 150CG-141-40-032917 CG-141-40 3/29/2017 < 1.0 < 1.0 1.6 < 1.0 130CI-10-35-031413 CI-10-35 3/14/2013 < 0.20 27 4.2 0.46 6.2CI-10-35-080713 CI-10-35 8/7/2013 < 0.20 24 5.1 0.44 9.3CI-10-35-031314 CI-10-35 3/13/2014 < 0.20 26 5.1 0.49 8.6CI-10-35-092414 CI-10-35 9/24/2014 < 0.20 19 4.4 0.39 10CI-10-35-031715 CI-10-35 3/17/2015 < 0.20 21 6.7 0.49 10CI-10-35-092215 CI-10-35 9/22/2015 < 0.20 20 4.9 0.47 9.8CI-10-35-032416 CI-10-35 3/24/2016 < 0.20 21 5.4 0.48 8.0CI-10-35-092116 CI-10-35 9/21/2016 < 0.20 17 5.5 0.45 11CI-10-35-032917 CI-10-35 3/29/2017 < 0.20 23 10 0.54 5.9CI-11-30-031313 CI-11-30 3/13/2013 < 0.20 < 0.20 0.36 < 0.20 0.93CI-11-30-031214 CI-11-30 3/12/2014 < 0.20 < 0.20 0.26 < 0.20 0.74CI-11-30-031915 CI-11-30 3/19/2015 < 0.20 < 0.20 0.46 < 0.20 0.85CI-11-30-032316 CI-11-30 3/23/2016 < 0.20 < 0.20 0.28 < 0.20 1.0

2.9 2 0.7 2 NR 4 1,000 2 0.18 2Preliminary Cleanup Levels-Shallow Zone

Shallow Zone








PCE TCEcis-1,2-



CI-12-30-031413 CI-12-30 3/14/2013 < 0.20 < 0.20 0.69 < 0.20 7.6CI-12-30-080613 CI-12-30 8/6/2013 < 0.20 < 0.20 2.2 < 0.20 22CI-12-30-031114 CI-12-30 3/11/2014 < 0.20 < 0.20 0.47 < 0.20 1.5DUP-1-031114 CI-12-30 3/11/2014 < 0.20 < 0.20 0.46 < 0.20 1.5

CI-12-30-092314 CI-12-30 9/23/2014 < 0.20 < 0.20 0.54 < 0.20 3.9DUP-1-092314 CI-12-30 9/23/2014 < 0.20 < 0.20 0.48 < 0.20 3.2

CI-12-30-031715 CI-12-30 3/17/2015 < 0.20 < 0.20 0.36 < 0.20 1.3DUP2-031715 CI-12-30 3/17/2015 < 0.20 < 0.20 0.38 < 0.20 1.4

CI-12-30-092215 CI-12-30 9/22/2015 < 0.20 < 0.20 0.53 < 0.20 1.7DUP-1-092215 CI-12-30 9/22/2015 < 0.20 < 0.20 0.50 < 0.20 1.6

CI-12-30-032216 CI-12-30 3/22/2016 < 0.20 < 0.20 0.34 < 0.20 1.3CI-12-30-092016 CI-12-30 9/20/2016 < 0.20 < 0.20 1.0 < 0.20 1.7CI-13-30-031313 CI-13-30 3/13/2013 < 0.20 0.33 33 < 0.20 0.43CI-13-30-031114 CI-13-30 3/11/2014 < 0.20 1.0 46 0.37 0.75CI-13-30-031715 CI-13-30 3/17/2015 < 0.40 1.3 57 0.51 0.51

DUP1-031715 CI-13-30 3/17/2015 < 0.40 1.2 54 0.43 0.51CI-13-30-032216 CI-13-30 3/22/2016 < 0.40 1.4 69 0.49 0.64DUP-1-032216 CI-13-30 3/22/2016 < 0.40 1.4 68 0.49 0.65

CI-13-30-032817 CI-13-30 3/28/2017 < 0.40 1.4 54 0.50 0.70CI-14-35-031413 CI-14-35 3/14/2013 < 0.40 48 36 0.68 1.4CI-14-35-080613 CI-14-35 8/6/2013 < 0.40 34 60 0.84 1.3CI-14-35-031214 CI-14-35 3/12/2014 < 0.40 42 58 1.3 0.97CI-14-35-092414 CI-14-35 9/24/2014 < 0.40 17 89 0.77 1.1CI-14-35-031715 CI-14-35 3/17/2015 < 1.0 26 100 1.1 1.3CI-14-35-092215 CI-14-35 9/22/2015 < 0.40 8.2 95 0.97 1.2CI-14-35-032316 CI-14-35 3/23/2016 < 0.40 14 68 1.0 1.2CI-14-35-092116 CI-14-35 9/21/2016 < 0.20 0.52 22 < 0.20 < 0.20CI-14-35-032817 CI-14-35 3/28/2017 < 0.40 13 67 1.1 1.2

2.9 2 0.7 2 NR 4 1,000 2 0.18 2Preliminary Cleanup Levels-Shallow Zone

Shallow Zone








PCE TCEcis-1,2-



CI-15-40-031513 CI-15-40 3/15/2013 < 0.20 < 0.20 1.3 < 0.20 0.42DUP-3-031513 CI-15-40 3/15/2013 < 0.20 < 0.20 1.5 < 0.20 0.42

CI-15-40-080713 CI-15-40 8/7/2013 < 0.20 < 0.20 2.1 < 0.20 0.76DUP-2-080713 CI-15-40 8/7/2013 < 0.20 < 0.20 2.0 < 0.20 0.75

CI-15-40-031314 CI-15-40 3/13/2014 < 0.20 < 0.20 2.0 < 0.20 1.3DUP-3-031314 CI-15-40 3/13/2014 < 0.20 < 0.20 2.0 < 0.20 1.3

CI-15-40-092314 CI-15-40 9/23/2014 < 0.20 < 0.20 1.6 < 0.20 1.0DUP-2-092314 CI-15-40 9/23/2014 < 0.20 < 0.20 1.7 < 0.20 1.2

CI-15-40-031815 CI-15-40 3/18/2015 < 0.20 < 0.20 2.0 < 0.20 1.2CI-15-40-092315 CI-15-40 9/23/2015 < 0.20 < 0.20 2.9 < 0.20 2.0DUP-2-092315 CI-15-40 9/23/2015 < 0.20 < 0.20 3.0 < 0.20 1.7

CI-15-40-032416 CI-15-40 3/24/2016 < 0.20 < 0.20 2.9 < 0.20 0.91DUP-3-032416 CI-15-40 3/24/2016 < 0.20 < 0.20 2.9 < 0.20 0.96

CI-15-40-092116 CI-15-40 9/21/2016 < 0.20 < 0.20 5.8 < 0.20 0.81CI-16-30-031513 CI-16-30 3/15/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-16-30-031214 CI-16-30 3/12/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-16-30-032316 CI-16-30 3/23/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-17-30-031313 CI-17-30 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 0.23CI-17-30-031114 CI-17-30 3/11/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-17-30-032216 CI-17-30 3/22/2016 < 0.20 < 0.20 < 0.20 < 0.20 0.38DUP-2-032216 CI-17-30 3/22/2016 < 0.20 < 0.20 < 0.20 < 0.20 0.36

CI-17-30-032817 CI-17-30 3/28/2017 < 0.20 < 0.20 < 0.20 < 0.20 0.72CI-18-30-031313 CI-18-30 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-18-30-031114 CI-18-30 3/11/2014 < 0.20 < 0.20 < 0.20 < 0.20 0.42CI-18-30-031715 CI-18-30 3/17/2015 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-18-30-032216 CI-18-30 3/22/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-18-30-032817 CI-18-30 3/28/2017 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-19-30-031413 CI-19-30 3/14/2013 < 0.20 < 0.20 1.2 < 0.20 1.2CI-19-30-080613 CI-19-30 8/6/2013 < 0.20 < 0.20 1.7 < 0.20 1.6CI-19-30-031114 CI-19-30 3/11/2014 < 0.20 < 0.20 1.7 < 0.20 1.2CI-19-30-092314 CI-19-30 9/23/2014 < 0.20 < 0.20 1.8 < 0.20 1.4CI-19-30-031815 CI-19-30 3/18/2015 < 0.20 < 0.20 1.8 < 0.20 1.7CI-19-30-092215 CI-19-30 9/22/2015 < 0.20 < 0.20 2.6 < 0.20 1.6CI-19-30-032216 CI-19-30 3/22/2016 < 0.20 < 0.20 1.9 < 0.20 1.1CI-19-30-092016 CI-19-30 9/20/2016 < 0.20 < 0.20 1.7 < 0.20 0.97DUP-2-092016 CI-19-30 9/20/2016 < 0.20 < 0.20 1.6 < 0.20 0.91

CI-19-30-033017 CI-19-30 3/30/2017 < 0.20 < 0.20 1.5 < 0.20 6.32.9 2 0.7 2 NR 4 1,000 2 0.18 2

Shallow Zone

Preliminary Cleanup Levels-Shallow Zone








PCE TCEcis-1,2-



CI-7-40-031313 CI-7-40 3/13/2013 < 0.20 < 0.20 0.78 < 0.20 1.1CI-7-40-080813 CI-7-40 8/8/2013 0.31 < 0.20 < 0.20 < 0.20 0.80CI-7-40-031214 CI-7-40 3/12/2014 < 0.20 < 0.20 2.0 < 0.20 1.5CI-7-40-092314 CI-7-40 9/23/2014 < 0.20 < 0.20 < 0.20 < 0.20 0.46CI-7-40-031715 CI-7-40 3/17/2015 < 0.20 < 0.20 2.5 < 0.20 1.7CI-7-40-092315 CI-7-40 9/23/2015 < 0.20 < 0.20 < 0.20 < 0.20 0.81CI-7-40-032216 CI-7-40 3/22/2016 < 0.20 < 0.20 1.2 < 0.20 0.96CI-7-40-092016 CI-7-40 9/20/2016 < 0.20 < 0.20 < 0.20 < 0.20 0.78CI-8-40-031413 CI-8-40 3/14/2013 < 0.20 < 0.20 15 < 0.20 10CI-8-40-031314 CI-8-40 3/13/2014 < 0.20 < 0.20 25 < 0.20 13CI-8-40-031815 CI-8-40 3/18/2015 < 0.20 < 0.20 24 < 0.20 12CI-8-40-032216 CI-8-40 3/22/2016 < 0.20 < 0.20 20 < 0.20 10CI-9-40-031313 CI-9-40 3/13/2013 < 0.20 < 0.20 4.9 < 0.20 0.88CI-9-40-031214 CI-9-40 3/12/2014 < 0.20 < 0.20 4.8 < 0.20 0.83CI-9-40-031715 CI-9-40 3/17/2015 < 0.20 < 0.20 5.5 < 0.20 0.85CI-9-40-032316 CI-9-40 3/23/2016 < 0.20 < 0.20 5.6 < 0.20 0.55

2.9 2 0.7 2 NR 4 1,000 2 0.18 2

CG-141-50-031413 CG-141-50 3/14/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CG-141-50-080713 CG-141-50 8/7/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CG-141-50-031314 CG-141-50 3/13/2014 < 0.20 < 0.20 < 0.20 < 0.20 0.44CI-141-50-092314 CG-141-50 9/23/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CG-141-50-031815 CG-141-50 3/18/2015 < 1.0 < 1.0 < 1.0 < 1.0 140CG-141-50-092315 CG-141-50 9/23/2015 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CG-141-50-032416 CG-141-50 3/24/2016 < 1.0 < 1.0 < 1.0 < 1.0 160CG-141-50-092116 CG-141-50 9/21/2016 < 1.0 < 1.0 < 1.0 < 1.0 140CG-141-50-032917 CG-141-50 3/29/2017 < 1.0 < 1.0 < 1.0 < 1.0 140

DUP-1-032917 CG-141-50 3/29/2017 < 1.0 < 1.0 < 1.0 < 1.0 150CI-10-65-031413 CI-10-65 3/14/2013 < 0.20 0.29 0.66 < 0.20 1.2CI-10-65-031314 CI-10-65 3/13/2014 < 0.20 < 0.20 0.77 < 0.20 1.5CI-10-65-031815 CI-10-65 3/18/2015 < 0.20 < 0.20 0.89 < 0.20 1.8CI-10-65-032416 CI-10-65 3/24/2016 < 0.20 < 0.20 0.60 < 0.20 1.9CI-11-60-031313 CI-11-60 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 0.77CI-11-60-031214 CI-11-60 3/12/2014 < 0.20 < 0.20 < 0.20 < 0.20 0.91CI-11-60-032316 CI-11-60 3/23/2016 < 0.20 < 0.20 < 0.20 < 0.20 0.67

2.9 2 0.7 2 NR 4 1,000 2 0.18 2

Shallow Zone

Preliminary Cleanup Levels-Intermediate Zone

Intermediate Zone

Preliminary Cleanup Levels-Shallow Zone








PCE TCEcis-1,2-



CI-12-60-031413 CI-12-60 3/14/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-12-60-031114 CI-12-60 3/11/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20

--- CI-12-60 3/17/2015--- CI-12-60 3/22/2015

CI-13-60-031313 CI-13-60 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20DUP-1-031313 CI-13-60 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20

CI-13-60-031114 CI-13-60 3/11/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20DUP-2-031114 CI-13-60 3/11/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20

CI-13-60-032216 CI-13-60 3/22/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-13-60-032817 CI-13-60 3/28/2017 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20

CG-137-50-031413 CI-137-50 3/14/2013 < 0.20 < 0.20 < 0.20 < 0.20 4.1CG-137-50-080813 CI-137-50 8/8/2013 < 0.20 < 0.20 < 0.20 < 0.20 3.9CG-137-50-031314 CI-137-50 3/13/2014 < 0.20 < 0.20 < 0.20 < 0.20 3.1CG-137-50-031915 CG-137-50 3/19/2015 < 0.20 < 0.20 < 0.20 < 0.20 2.0CG-137-50-092415 CG-137-50 9/24/2015 < 0.20 < 0.20 < 0.20 < 0.20 2.5CG-137-50-032316 CG-137-50 3/23/2016 < 0.20 < 0.20 < 0.20 < 0.20 1.6CG-137-50-092116 CG-137-50 9/21/2016 < 0.20 < 0.20 < 0.20 < 0.20 3.1CI-14-70-031513 CI-14-70 3/15/2013 < 0.20 < 0.20 0.28 < 0.20 0.41DUP-2-031513 CI-14-70 3/15/2013 < 0.20 < 0.20 0.22 < 0.20 0.44

CI-14-70-032316 CI-14-70 3/23/2016 < 0.20 < 0.20 0.77 < 0.20 0.34CI-14-70-032817 CI-14-70 3/28/2017 < 0.20 < 0.20 2.2 < 0.20 0.76CI-15-60-031413 CI-15-60 3/14/2013 < 1.0 < 1.0 < 1.0 < 1.0 86CI-15-60-080713 CI-15-60 8/7/2013 < 1.0 < 1.0 < 1.0 < 1.0 110CI-15-60-031314 CI-15-60 3/13/2014 < 0.40 < 0.40 < 0.40 < 0.40 72CI-15-60-092314 CI-15-60 9/23/2014 < 1.0 < 1.0 < 1.0 < 1.0 88CI-15-60-031815 CI-15-60 3/18/2015 < 0.40 < 0.40 < 0.40 < 0.40 93

DUP3-031815 CI-15-60 3/18/2015 < 0.40 < 0.40 < 0.40 < 0.40 79CI-15-60-092315 CI-15-60 9/23/2015 < 0.40 < 0.40 < 0.40 < 0.40 96CI-15-60-032416 CI-15-60 3/24/2016 < 1.0 < 1.0 < 1.0 < 1.0 99CI-15-60-092116 CI-15-60 9/21/2016 < 1.0 < 1.0 < 1.0 < 1.0 100CI-15-60-032917 CI-15-60 3/29/2017 < 0.40 < 0.40 < 0.40 < 0.40 63DUP-2-032917 CI-15-60 3/29/2017 < 0.40 < 0.40 < 0.40 < 0.40 65

CI-16-60-031513 CI-16-60 3/15/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-16-60-031214 CI-16-60 3/12/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-16-60-032316 CI-16-60 3/23/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20

2.9 2 0.7 2 NR 4 1,000 2 0.18 2Preliminary Cleanup Levels-Intermediate Zone

Intermediate Zone

Not Sampled - Well InaccessibleNot Sampled - Well Inaccessible








PCE TCEcis-1,2-



CI-20-80-092415 CI-20-80 9/24/2015 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-20-80-121815 CI-20-80 12/18/2015 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-20-80-032316 CI-20-80 3/23/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-20-80-062816 CI-20-80 6/28/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-20-80-092116 CI-20-80 9/21/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-7-60-031313 CI-7-60 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-7-60-031214 CI-7-60 3/12/2014 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-7-60-032216 CI-7-60 3/22/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-8-60-031815 CI-8-60 3/18/2015 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-8-60-032216 CI-8-60 3/22/2016 < 0.20 < 0.20 < 0.20 < 0.20 < 0.20CI-9-70-031313 CI-9-70 3/13/2013 < 0.20 < 0.20 < 0.20 < 0.20 0.28CI-9-70-031214 CI-9-70 3/12/2014 < 0.20 < 0.20 < 0.20 < 0.20 0.24CI-9-70-032316 CI-9-70 3/23/2016 < 0.20 < 0.20 < 0.20 < 0.20 0.25

2.9 2 0.7 2 NR 4 1,000 2 0.18 2

NOTES:PCE = tetrachloroethene

Shallow Zone = groundwater collected from 20 to 40 feet below ground surface

4NR denotes "not researched," which indicates that no regulatory standards or toxicity information are available for the constituent of concern to derive a cleanup level for the medium of potential concern.

Results in bold denote concentrations exceeding applicable cleanup levels.

3Groundwater cleanup levels protective of the air pathway for unrestricted land use (residential and commercial sites) and industrial land use were derived using the following equation: Gwcul = Aircul/GIVF.

1Analyzed by U.S. Environmental Protection Agency Method 8260B or 8260C.< denotes analyte not detected at or exceeding the laboratory reporting limit listed.

2 Preliminary Cleanup Level based on the letter regarding EPA's Partial Approval/Partial Disapproval of Washington's Human Health Water Quality Criteria and Implementation Tools dated November 15, 2016, prepared by the U.S. Environmental Protection Agency.

Intermediate Zone = groundwater collected from 40 to 70 feet below ground surface

Preliminary Cleanup Levels-Intermediate Zone

TCE = trichloroetheneµg/l = micrograms per liter

Water Table Zone = groundwater collected from the first-encountered groundwater to 20 feet below ground surface

Intermediate Zone

Table 2Summary of Preliminary Cleanup Levels

Updated January 18, 2017West of 4th Site

Seattle, WashingtonFarallon PN: 457-010

4/27/2017P:\457 Capital Indust\457009 West of 4th - W4 PLP Group\Reports\Pilot Study WP\Tables\457-009 Pilot Study WP tables

Table 11 of 1

Sediment

Puget Sound Background

Concentrations for Metals1

Soil Cleanup Level Protective of Direct

Contact Pathway (Unrestricted Land Use)2

Soil Cleanup Level Protective of Direct

Contact Pathway (Industrial Land Use)2

Soil Cleanup Level Protective of Air Quality based on

Protection of Groundwater as Potable Drinking

Water3

Soil Cleanup Level Protective of Groundwater

Concentrations Protective of Surface

Water Quality4

Groundwater Cleanup Level Protective of Air

Quality Water Table Zone (Unrestricted Land Use)5

Groundwater Cleanup Level Protective of Air

Quality Water Table Zone (Industrial Land Use)5

Groundwater Cleanup Level

Protective of Surface Water6

Groundwater Cleanup Level Protective of

Sediment7

Air Cleanup Level Protective of Inhalation

Pathway (Unrestricted Land Use)2

Air Cleanup Level Protective of Inhalation Pathway (Industrial Land Use)2

Surface Water Cleanup Level Protective of

Human Health8

Surface Water Cleanup Level Protective of

Aquatic Life Sediment Cleanup Level9

(Milligrams/kilogram)

Tetrachloroethene Carcinogen -- 476 21,000 0.08 0.04 116 482 2.9 36,000 9.6 40 2.9 -- 190Trichloroethene Carcinogen -- 12 1,750 0.03 0.006 6.9 37 0.7 4,760,000 0.37 2 0.7 194 12 8,950cis-1,2-Dichloroethene Non-Carcinogen -- 160 7,000 -- -- -- -- -- -- -- -- -- -- --trans-1,2-Dichloroethene Non-Carcinogen -- 1,600 70,000 0.59 6 559 1,224 1,000 -- 27.4 60 1,000 -- --1,1-Dichloroethene Non-Carcinogen -- 4,000 175,000 0.055 0.025 538 1,176 3.2 -- 91.4 200 3.2 -- --Vinyl chloride Carcinogen -- 0.67 87.5 0.002 0.001 1.3 12.7 0.18 543,000 0.28 2.8 0.18 210 13 2021,4-Dioxane Carcinogen -- 10 1,310 0.004 0.32 2,551 25,510 78 -- 0.5 5 78 -- --Arsenic Carcinogen 20 20 87.5 Not Applicable 0.082 Not Applicable Not Applicable 0.14 / 5 10 241 Not Applicable Not Applicable 0.14 / 5 10 36 14 7Barium Non-Carcinogen -- 16,000 700,000 Not Applicable 824 Not Applicable Not Applicable -- -- Not Applicable Not Applicable -- -- --Cadmium Non-Carcinogen 1 80 3,500 Not Applicable 1.2 Not Applicable Not Applicable 8.8 760 Not Applicable Not Applicable -- 8.8 15 5.1Copper Non-Carcinogen 36 3,200 140,000 Not Applicable 1.1 Not Applicable Not Applicable 3.1 11 18,000 Not Applicable Not Applicable -- 3.1 15 390Iron Non-Carcinogen 58,700 58,700 2,450,000 Not Applicable -- Not Applicable Not Applicable -- -- Not Applicable Not Applicable 1,000 -- --Manganese Non-Carcinogen 1,200 11,200 490,000 Not Applicable -- Not Applicable Not Applicable 100 -- Not Applicable Not Applicable 100 -- --Nickel Non-Carcinogen 48 1,600 70,000 Not Applicable 11 Not Applicable Not Applicable 8.2 2,200 Not Applicable Not Applicable 100 8.2 15 15.9Zinc Non-Carcinogen 85 24,000 1,050,000 Not Applicable 101 Not Applicable Not Applicable 81 6,600 Not Applicable Not Applicable 1,000 81 15 410

NOTES:Preliminary cleanup levels presented represent the most stringent cleanup levels for the constituent of concern listed in the media indicated. -- indicates no value is available. In the case of ARARs, the reference sources do not publish values for the noted chemicals. In the case of calculated values, one or more input parameters are not available.

1 Backgound metals values from Ecology Publication No. 94-115, Natural Background Soil Metals Concentrations in Washington State. Arsenic background from MTCA, Table 740-1 Method A Soil Cleanup Levels for Unrestricted Land Uses.2 Cleanup level is based on standard Washington State Model Toxics Control Act Cleanup Regulation (MTCA) Method B (unrestricted land use) or Method C (industrial land use) values from the Cleanup and Risk Calculations tables (CLARC).

10 Arsenic Cleanup level of 5 ug/L based on background concentrations for state of Washington (MTCA Table 720-1).11 The surface water cleanup level for copper had previously been tabulated as 2.4ug/L; however this value is based on an approach using site-specific water effects ratio which has not been determined. We have replaced this with 3.1 ug/L, National Recommended Water Quality Criteria published by EPA under 304 of the Federal Clean Water Act - Aquatic Life Criteria Table.12 Oak Ridge Nation Laboratory (ORNL) Toxicological Benchmarks for Screening Potential Contaminants of Concern for Effects on Aquatic Biota13 Peer Review Literature - DeRooij et al., 2004, Euro Chlor Risk Assessment for the Marine Environment OSPARCOM Region – North Sea – Environmental Monitoring and Assessment14 WAC- 173-201A-24015 National Recommended Water Quality Criteria published by EPA under 304 of the Federal Clean Water Act - Aquatic Life Criteria TableTable updated August 14, 2015 based on revisions to AWQC; July 20, 2016 based on Ecology comments on the Draft FS Reports for SU1 and SU2 (clarify footnotes, add sediment values, add surface water CULs protective of aquatic life); and January 17, 2017 based on EPA's revisions to the Clean Water Act Human Health criteria (dated 11/15/16).

(Micrograms/cubic meter)

7 Groundwater screening levels based on the transfer of contaminants from groundwater to sediment were calculated by dividing the sediment screening level by the associated partition coefficients. Koc and Kd values are from MTCA. Fraction of carbon assumed at 0.02 based on Lower Duwamish Waterway Feasibility Study (AECOM, 2012).8 The most stringent exposure pathway for human health receptors are for consumption of fish. Listed values are based on ARARs listed in CLARC except: (1) 1,4-dioxane is derived from MTCA Method B default values and values; (2) PCE, TCE, trans-DCE, vinyl chloride, nickel and zinc are based on EPA's revised CWA Human Health Criteria - Organism Only dated 11/15/16. 9 Sediment has not been confirmed to be affected by groundwater discharge to surface water. Sediment cleanup levels were derived from the Lower Duwamish Waterway Superfund Site Record of Decisions (EPA, 2014), which does not contain values for nickel, TCE, PCE, or vinyl chloride. These constituents are not listed in the Sediment Managment Standards (WAC 173-204) either. EPA Region 3 BTAG

(Micrograms/liter)

"Not Applicable" is used where the constituent of concern will not affect the media of potential concern due to an incomplete pathway.

3 Soil cleanup levels for protection of air quality are calculated using MTCA Equation 747-1 where the potable Method B groundwater cleanup level was used as Cw. Concentrations of hazardous substances in soil that meet the potable groundwater protection standard currently are considered sufficiently protective of the air pathway for unrestricted and industrial land uses.4 Soil cleanup levels for protection of surface water quality are calculated using MTCA Equation 747-1 where the groundwater cleanup level protective of surface water in this table was used as Cw. 5 Groundwater cleanup levels protective of the air pathway for unrestricted land use (residential and commercial sites) and industrial land use were derived using the following equation: Gwcul = Aircul/GIVF. 6 Human health and marine aquatic ecologic receptors were considered. Refer to the Surface Water Cleanup Levels Protective of Human Health and Aquatic Life in this table. The more stringent value of the two receptors has been listed for the Groundwater Cleanup Level Protective of Surface Water.

Constituent of ConcernCarcinogen or Non-

Carcinogen

Preliminary Cleanup Levels

Soil Groundwater Air Surface Water

(Milligrams/kilogram) (Micrograms/liter)

Table 3Summary of Natural Attenuation and Water Quality Parameters





3/15/2013 0.85 0.14 11 4,800 2.4 95 < 0.1 8.5 < 0.50 < 0.50 5.64 16.02 0.107 141.7 2.0

8/8/2013 0.41 < 0.050 13 3,500 1.6 84 < 0.1 6.5 < 0.50 < 0.50 6.89 17.56 0.173 67.1 2.4

3/13/2014 3.19 < 0.050 49 7,300 0.2 250 < 0.1 17 < 1.5 < 1.5 6.47 16.25 0.258 -20.4 3.1

9/24/2014 0.52 1.2 54 8,600 0.4 300 < 0.1 16 < 1.0 < 1.0 6.6 18.06 0.313 -27.2 3.7

3/18/2015 0.23 < 0.050 18 7,200 0.6 180 < 0.1 6.8 < 0.50 < 0.50 6.52 16.75 0.191 22.9 3.8

9/24/2015 0.46 < 0.050 26 5,900 4.2 190 < 0.1 15 < 1.0 0.57 5.70 18.88 0.203 IE 3.7

3/23/2016 2.89 < 0.050 13 3,800 2.0 130 < 0.1 94 < 2.2 0.56 6.46 16.19 0.152 -24.5 3.1

9/21/2016 1.68 < 0.050 35 6,200 4.0 240 < 0.1 14 < 0.50 < 0.50 6.44 18.6 0.2533 -67.1 3.4

3/14/2013 0.4 0.78 23 3,000 1 56 < 0.1 2.6 < 0.50 < 0.50 6.17 14.95 0.165 9.7 4.5

8/7/2013 0.41 1.1 45 3,200 1.2 120 < 0.1 9.5 < 0.50 < 0.50 6.30 18.88 0.47 176.2 5.9

3/13/2014 8.13 2.1 32 1,600 0.4 110 < 0.1 2.3 < 0.50 < 0.50 6.22 15.61 0.262 109.6 4.7

9/24/2014 0.38 0.74 39 2,400 0.5 420 < 0.1 17 1.7 < 1.0 6.40 19.31 0.291 -23 4.5

3/18/2015 8.77 0.23 37 1,500 < 0.2 140 < 0.1 5 0.61 < 0.50 6.21 15.14 0.276 50.6 4.6

9/22/2015 0.65 0.33 53 2,000 < 0.2 490 < 0.1 8.9 < 0.50 < 0.50 6.12 20.23 0.32 -26.8 4.4

3/24/2016 0.75 4.2 33 550 < 0.2 110 < 0.1 3.8 < 0.50 < 0.50 6.15 14.93 0.269 112.0 4.5

9/21/2016 0.28 1.1 43 4,400 < 0.2 610 < 0.1 27 1.5 < 0.50 6.22 19.6 0.3009 102.5 5.4

3/29/2017 3.91 NA NA NA NA NA NA NA NA NA 6.16 14.3 0.232 187.6 NA

3/13/2013 0.6 NA NA NA 1.4 NA < 0.1 NA NA NA 6.47 13.48 0.521 -15.7 NA



3/14/2013 0.96 0.06 120 4,800 1 120 < 0.1 73 8.5 < 6.0 6.23 15.15 0.438 35.4 3.3

3/11/2014 5.62 < 0.050 380 5,200 0.6 500 < 0.1 < 0.50 < 0.50 < 0.50 7.36 11.11 0.834 -7.1 2.2

3/17/2015 0.17 0.31 350 6,200 0.8 240 < 0.1 29 < 0.50 < 0.50 6.26 13.69 1.01 42.3 2.6

3/13/2013 0.66 NA NA NA 0.6 NA < 0.1 NA NA NA 6.45 13.51 0.726 56.4 NA

8/6/2013 0.76 0.21 150 < 56 0.6 36 < 0.1 < 1.0 < 0.50 < 0.50 6.49 15.3 0.965 116.9 2.6

11/5/2014 1.31 2.9 170 820 NA 30 NA 0.74 < 0.50 < 0.50 5.65 17.53 0.718 40 2.9

9/23/2015 2.5 3 95 200 < 0.2 < 10 < 0.1 < 0.50 < 0.50 < 0.50 6.17 15.77 0.529 IE 2.4

9/20/2016 1.01 0.74 77 2,100 < 0.2 14 < 0.1 < 0.50 < 0.50 < 0.50 6.29 15.5 0.521 163.0 3.4

3/28/2017 1.01 NA NA NA < 0.2 NA NA NA NA NA 6.31 13.9 0.37 148.2 NA

Available Organic Carbon

Sample Location Sample Date

Dissolved Oxygen 1 (mg/l)

Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)

Water Quality Parameters 1Metabolic ByproductsTotal and Dissolved MetalsElectron Receptors

Ferrous Iron5

(mg/l)Temperature

(°Celsius)Conductivity

(mS/cm)ORP (mV)

CI-12-WT

CI-11-WT

TOC7

(mg/l)pH

Water Table Zone

Manganese (II)5

(mg/l)Methane6

(µg/l)

CI-10-WT

CI-13-WT

CG-137-WT









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)

3/14/2013 1.15 8.5 47 500 0.4 120 < 0.1 < 1.0 < 0.50 < 0.50 5.96 16.53 0.42 90 3.5

8/6/2013 0.2 9.8 40 < 56 0.4 120 < 0.1 < 1.0 < 0.50 < 0.50 6.19 19.89 0.702 127.3 3.2

3/12/2014 5.34 0.33 33 1,700 1 200 < 0.1 81 10 < 5.0 6.29 16.45 0.287 47 5.3

9/24/2014 0.62 1.3 31 160 0.2 62 < 0.1 24 < 2.0 < 2.0 6.45 18.27 0.257 133 4.2

3/17/2015 0.72 0.074 23 540 0.4 93 < 0.1 77 1.4 < 0.50 6.17 15.72 0.235 90 4.6

9/22/2015 0.96 5.2 32 85 < 0.2 66 < 0.1 6.1 < 0.50 < 0.50 5.52 20.90 0.307 IE 3.8

3/23/2016 2.17 3.6 31 290 0.20 63 < 0.1 3.5 < 0.50 < 0.50 6.22 14.68 0.270 -7.7 4.3

9/20/2016 2.86 6.3 29 4,000 0.5 400 < 0.1 2.6 < 0.50 < 0.50 6.21 20.6 0.3137 1.6 4.7

3/28/2017 0.73 5.0 27 NA NA NA NA 2.4 < 0.50 < 0.50 6.08 14.2 0.272 157.4 4.5

3/15/2013 0.7 NA NA NA 1.8 NA < 0.1 NA NA NA 6.51 16.09 0.547 -117 NA



3/13/2013 0.08 < 0.050 42 9,500 2 330 < 0.1 2400 < 250 < 250 6.77 13.09 2.62 18.2 2.7

8/6/2013 0.22 < 0.050 26 8,700 1.2 290 < 0.1 680 < 50 < 50 6.85 18.69 1.915 36.7 2.7

3/11/2014 1.88 3.5 110 3,600 1.8 190 < 0.1 190 < 25 < 25 6.65 12.32 1.394 0.2 2.4

11/5/2014 1.23 < 0.050 40 7,700 NA 320 NA 550 < 50 < 50 5.81 19.46 1.24 8 3

3/17/2015 0.82 0.29 97 13,000 2 730 < 0.1 690 < 0.50 < 0.50 6.39 14.51 3.727 -6.4 3.3

9/23/2015 0.69 0.11 48 12,000 4.6 340 < 0.1 260 < 0.50 < 0.50 6.50 18.11 2.691 IE 3.3

3/22/2016 7.33 < 0.050 86 4,300 1.75 310 < 0.1 270 < 250 < 0.68 6.58 13.27 1.835 -93.3 2.9

9/20/2016 0.43 2.0 < 5.0 35,000 2.0 460 < 0.1 7,700 < 66 < 5.4 6.81 16.7 0.980 -102.9 6.2

3/28/2017 0.16 NA NA NA NA NA NA NA NA NA 6.68 12.3 1.594 -2.9 NA



3/22/2016 3.34 NA NA NA < 0.2 NA < 0.1 NA NA NA 6.05 12.62 0.584 -87.6 NA






Water Table Zone

CI-14-WT

CI-17-WT

CI-18-WT

CI-19-WT

CI-16-WT









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)

3/13/2013 0.57 1.6 36 4,900 1 110 < 0.1 2.6 < 0.50 < 0.50 5.87 13.93 0.256 71.6 2.6

8/7/2013 0.36 0.52 30 1,900 0.8 100 < 0.1 4.3 < 0.50 < 0.50 6.42 17.88 0.406 128.2 3.2

3/12/2014 0.75 3.8 25 1,900 0.6 130 < 0.1 1.2 < 0.50 < 0.50 6.13 14.62 0.341 155.1 3.6

9/23/2014 0.38 11 39 4,500 0.4 180 < 0.1 0.82 < 0.50 < 0.50 6.19 19.9 0.473 13 4.5

3/17/2015 8.7 1.1 31 760 < 0.2 130 < 0.1 4.8 < 0.50 < 0.50 5.99 15 0.283 17.2 3.4

9/23/2015 1.22 2.5 33 420 < 0.2 120 < 0.1 9.1 < 0.50 < 0.50 6.07 18.16 0.303 9.4 2.7

3/23/2016 0.07 2.8 29 1,300 < 0.2 140 < 0.1 24 < 0.74 < 0.50 6.03 14.29 0.317 40.8 2.8

9/20/2016 0.40 4.5 32 6,300 0.5 180 < 0.1 49 < 1.5 < 0.50 6.14 18.2 0.3419 68.5 3.5



9/24/2015 IE NA NA NA 0.8 NA < 0.1 NA NA NA 5.91 18.61 0.131 IE NA




3/18/2015 1.17 < 0.050 30 13,000 < 0.2 270 < 0.1 48 1.3 < 0.50 5.97 15.3 0.31 7.6 6.4

3/23/2016 1.12 0.085 40 13,000 0.20 230 < 0.1 42 3.6 < 0.50 6.27 14.79 0.341 -65.3 5.7


3/13/2013 1.58 2.2 60 1,100 0.6 840 < 0.1 7.9 1.1 < 0.50 6.09 13.53 0.361 45.9 4.6

8/8/2013 0.18 1.4 84 340 1 610 < 0.1 7.1 1.7 < 0.50 6.46 19.03 0.79 107.1 5.5

3/13/2014 2.48 2.6 63 1,100 0.8 770 < 0.1 1 < 0.50 < 0.50 6.25 14.49 0.414 266.8 4.7

9/24/2014 0.31 0.72 99 140 0.2 450 < 0.1 41 4.1 < 2.5 6.4 19.53 0.546 11 6.7

3/17/2015 8.74 5.3 71 860 < 0.2 990 < 0.1 < 0.50 < 0.50 < 0.50 5.97 15.86 0.452 66.7 4.8

9/23/2015 0.24 0.51 71 280 < 0.2 570 < 0.1 6.1 < 0.50 < 0.50 6.25 18.94 0.473 7.1 6.1

3/24/2016 4.12 2.1 41 670 < 0.2 560 < 0.1 1.3 < 0.50 < 0.50 5.90 13.37 0.324 75.3 3.6

9/22/2016 0.40 0.66 86 520 0.5 970 < 0.1 5.4 0.59 < 0.50 6.28 18.7 0.579 180.7 6.3

3/18/2015 0.81 < 0.050 49 8,100 NA 540 NA 53 3 < 0.50 6.01 15.69 0.429 4.8 5.8

9/23/2015 1.41 < 0.050 54 7,700 5 480 < 0.1 29 < 2.0 < 0.50 6.05 18.67 0.392 -19.3 5.6

3/22/2016 2.20 < 0.050 35 5,700 2.0 510 < 0.1 96 5.2 < 0.50 6.28 15.12 0.395 33.7 5.7

9/21/2016 0.22 < 0.050 50 20,000 4.0 560 < 0.1 28 1.5 < 0.50 6.34 18.4 0.4337 -31.9 8.2

MW-3

MW-4

Water Table Zone

MW-5

CI-9-WT

MW-2









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)




3/13/2013 2.06 0.92 21 3,300 2 44 < 0.1 2.8 1.2 < 0.50 6.13 13.21 0.128 25.5 2

8/8/2013 0.38 2.9 48 16,000 1.6 320 < 0.1 7.5 1.4 < 0.50 6.59 16.8 0.543 62.9 2.8

3/12/2014 1.38 8.2 51 7,300 1.2 240 < 0.1 21 3.8 < 1.5 6.16 14.55 0.369 141.4 2.4

9/23/2014 0.62 2.7 60 8,700 2.6 250 < 0.1 20 3.2 < 1.0 6.37 18.73 0.386 -73 3.1

3/17/2015 IE 1.1 46 8,700 < 0.2 250 < 0.1 59 8.7 < 0.50 5.90 15.11 0.317 81.1 3.7

9/23/2015 0.69 4.1 34 NA 3 NA < 0.1 220 30 < 0.50 6.15 18.52 0.366 -22 3.8

3/22/2016 2.94 2.1 36 8,000 1.0 68 < 0.1 9.2 0.99 < 0.50 5.92 13.81 0.260 74.4 2.8

9/20/2016 0.38 6.3 48 70,000 2.0 210 < 0.1 60 8.0 < 0.50 6.06 18.0 0.3833 17.8 7.3


3/14/2013 0.47 1 98 1,600 1 190 < 0.1 < 1.0 < 0.50 < 0.50 5.48 13.87 0.411 31.1 2.3

3/13/2014 2.25 2.3 74 3,300 1 210 < 0.1 < 0.50 < 0.50 < 0.50 5.90 14.22 0.462 255.5 2.6

9/23/2014 0.49 0.71 59 930 0.8 160 < 0.1 < 0.50 < 0.50 < 0.50 6.17 19.8 0.365 23 2.6

3/18/2015 1.94 2.5 90 570 < 0.2 110 < 0.1 < 0.50 < 0.50 < 0.50 5.69 14.62 0.498 63 3.3

9/23/2015 0.67 0.51 71 970 NA 220 < 0.1 3.0 < 0.50 < 0.50 5.65 17.86 0.406 49.6 2.7

3/22/2016 0.61 3.4 88 490 < 0.2 150 < 0.1 1.4 < 0.50 < 0.50 5.89 14.08 0.503 66.1 3.2

9/20/2016 0.23 0.30 59 15,000 1.5 340 < 0.1 5.5 < 0.50 < 0.50 5.91 17.3 0.3953 68.4 4.0


3/15/2013 0.34 < 0.050 < 5.0 7,600 2.8 560 < 0.1 1,600 < 250 < 250 7.15 15.64 0.35 -116.3 3.8

8/8/2013 0.36 < 0.050 < 5.0 9,500 3.2 570 < 0.1 2,500 < 500 < 500 6.72 15.92 0.607 39.2 4.2

3/13/2014 1.94 < 0.050 < 5.0 6,900 1.4 550 < 0.1 2,100 < 250 < 250 6.52 15.79 0.387 -38.7 3.9

9/24/2014 1.87 0.087 < 5.0 9,700 0.2 660 < 0.1 1,600 < 250 < 250 6.57 16.36 0.37 -40.8 4.4

3/18/2015 5.02 < 0.050 < 5.0 7,900 0.4 590 < 0.1 1,700 60 32 6.51 15.89 0.381 -16.6 4.5

9/24/2015 0.72 < 0.050 < 5.0 8,200 3.2 520 < 0.1 900 < 50 22 5.48 17.11 0.379 IE 4.2

3/23/2016 3.72 < 0.050 < 5.0 6,700 2.0 500 < 0.1 1,700 250 18 6.51 15.96 0.363 -48.1 4.6

9/22/2016 0.40 < 0.050 < 5.0 9,100 2.5 540 < 0.1 2,000 65 21 6.60 16.8 0.3844 -47.5 4.4

Water Table Zone

MW-8

Shallow Zone

CG-137-40

MW-6

MW-7









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)

3/14/2013 6.76 < 0.050 63 23,000 3.2 930 < 0.1 10,000 < 500 300 6.00 15.81 0.462 -49 3.3

8/7/2013 0.64 < 0.050 67 21,000 2 870 < 0.1 8,900 < 500 < 500 6.64 14.16 0.68 99 3.4

3/13/2014 4.08 0.18 58 21,000 0.4 860 < 0.1 4,900 < 500 < 500 6.34 13.05 0.458 -50.5 3.7

9/23/2014 0.54 0.069 56 21,000 0.2 870 < 0.1 10,000 < 500 < 500 6.35 14.36 0.432 -47.6 3.8

3/18/2015 0.28 0.060 46 23,000 0.6 920 < 0.1 8,500 20 200 6.39 13.78 0.45 -25.2 3.8

9/23/2015 0.77 0.19 47 23,000 1.8 850 < 0.1 7,200 < 250 350 5.36 14.24 0.442 IE 4.3

3/24/2016 9.05 < 0.050 53 17,000 2.0 850 < 0.1 2,300 < 20 17 5.97 13.27 0.385 -29.4 3.8

9/21/2016 0.19 < 0.050 42 23,000 2.0 870 < 0.1 8,000 < 120 180 6.43 14.7 0.4484 -53.4 4.1


3/14/2013 0.69 NA NA NA 2.8 NA 0.1 NA NA NA 6.05 15 0.265 -32.4 NA

8/7/2013 0.22 NA NA NA 1 NA < 0.1 NA NA NA 6.56 17.89 0.461 33 NA


9/24/2014 0.92 NA NA NA 3 NA < 0.1 NA NA NA 6.51 18.08 0.294 -114 NA






3/13/2013 0.38 0.15 < 25 38,000 1.6 910 < 0.1 7,300 < 500 < 500 6.10 13.78 0.529 -55.3 5.0

8/6/2013 0.35 0.46 < 25 33,000 2 780 < 0.1 5,400 < 500 < 500 6.73 12.37 0.704 -35 5.2

3/12/2014 1.26 0.29 < 25 27,000 1.6 860 < 0.1 5,400 < 500 < 500 6.46 15.28 0.537 -70.6 5.5

9/23/2014 0.71 0.086 < 25 43,000 < 0.2 850 < 0.1 5,400 < 500 < 500 6.69 17.3 0.492 -95.8 5.0

3/19/2015 1.08 0.40 < 25 61,000 0.6 1100 < 0.1 6,600 < 10 < 3.0 6.33 15.2 0.585 -108.2 6.7

9/22/2015 0.80 < 0.050 < 25 36,000 2.0 810 < 0.1 5,300 < 250 < 0.50 5.84 18.7 0.465 270.6 5.1

3/23/2016 7.90 < 0.050 < 25 46,000 1.8 840 < 0.1 7,400 < 100 < 12 6.40 14.95 0.514 -124.3 5.3

9/21/2016 0.45 < 0.050 < 25 43,000 2.0 800 < 0.1 7,000 < 110 < 12 6.58 16.8 0.4732 -99.2 5.9

Shallow Zone

CI-11-30

CG-141-40

CI-10-35









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)



3/11/2014 4.01 NA NA NA 2 NA < 0.1 NA NA NA 6.40 13.2 0.479 -2.8 NA


3/17/2015 0.13 0.11 42 19,000 2.2 470 < 0.1 240 2.2 < 0.50 6.16 14.32 0.419 8.6 4.6

9/22/2015 9.04 < 0.050 34 14,000 2.0 330 < 0.1 210 < 15 < 0.50 5.62 15.93 0.363 IE 4.9

3/22/2016 0.11 0.063 83 13,000 3.0 390 < 0.1 220 < 50 < 0.50 6.47 13.15 0.370 -225.6 4.3

9/20/2016 2.92 < 0.050 28 25,000 3.5 730 < 0.1 130 5 < 0.50 6.41 16.8 0.3254 -57.0 5.2

3/13/2013 0.28 NA NA NA 1 NA < 0.1 NA NA NA 6.62 13.91 0.698 55.5 NA




3/28/2017 0.22 < 0.050 33 NA 2.5 NA NA 140 < 3.9 < 0.68 6.35 14.5 0.326 -23.8 5.0

3/14/2013 1.68 < 0.050 29 18,000 2 360 < 0.1 120 12 < 10 6.06 17.51 0.309 -40 3.2

8/6/2013 0.35 < 0.050 30 17,000 1.8 340 < 0.1 95 < 10 < 10 6.53 18.87 0.453 39.3 3.3

3/12/2014 7.11 < 0.050 39 18,000 0.8 370 < 0.1 93 12 < 5.0 6.37 16.01 0.32 -1.3 3.3

9/24/2014 0.7 0.055 31 19,000 0.4 350 < 0.1 47 5.8 < 5.0 6.53 17.29 0.289 -38.2 3.6

3/17/2015 2.22 0.15 32 23,000 0.4 400 < 0.1 120 7.9 < 0.50 6.31 15.22 0.315 -16.7 3.7

9/22/2015 1.33 0.47 31 18,000 1.6 360 < 0.1 56 7.9 < 0.50 5.19 18.58 0.299 IE 3.5

3/23/2016 0.48 1.1 31 19,000 3.0 390 < 0.1 110 9 < 0.50 6.36 15.32 0.315 -76.4 3.7

9/21/2016 0.71 < 0.050 28 21,000 2.0 350 < 0.1 74 8.7 < 0.50 6.41 16.7 0.285 -59.1 3.5

3/28/2017 0.64 < 0.050 31 NA 2.0 NA NA 120 18 < 0.57 6.32 14.6 0.292 -37.6 3.6






9/23/2015 1.02 NA NA NA 0.80 NA < 0.1 NA NA NA 5.65 15.20 0.400 IE NA



CI-15-40

CI-14-35

CI-13-30

Shallow Zone

CI-12-30









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)








3/13/2013 0.18 < 0.050 63 4,100 1 120 < 0.1 1,600 < 250 < 250 6.63 13.28 0.856 71.3 2.4

8/6/2013 0.36 < 0.050 37 4,200 1.2 140 < 0.1 1,100 < 75 < 75 6.56 15.83 0.73 94.6 3.3

3/11/2014 0.81 0.056 12 4,600 0.8 160 < 0.1 4,200 < 500 < 500 6.51 13.4 0.426 -7.1 3.7

11/5/2014 1.44 0.23 40 5,500 < 0.2 140 < 0.1 4,600 < 500 < 500 4.97 17.19 0.453 78 3.5

3/17/2015 0.58 < 0.050 80 5,100 1.2 180 < 0.1 3,800 < 10 < 0.50 6.17 13.9 0.572 12.2 2.6

9/23/2015 0.77 0.30 68 3,200 3.8 160 < 0.1 1,300 < 50 < 0.50 5.88 15.68 0.537 IE 3.1

3/22/2016 0.26 < 0.050 85 2,600 1.5 140 < 0.1 59 < 5.0 < 0.50 6.25 13.54 0.569 -121.3 2.4

9/20/2016 1.79 < 0.050 59 51,000 2.5 450 < 0.1 5,100 < 68 < 4.9 6.47 15.7 0.558 22.5 4.0


3/14/2013 1.08 < 0.050 44 3,100 1.4 480 < 0.1 350 < 50 < 50 6.45 15.4 6.648 -201 5.5

8/6/2013 0.49 < 0.050 63 3,000 1.4 510 < 0.1 740 < 50 < 50 6.53 15.59 0.935 56 NA

3/11/2014 7.98 < 0.050 < 5.0 3,300 1.2 380 < 0.1 1,200 < 100 < 100 6.63 13.21 0.511 -92.2 4.6

9/23/2014 1.81 < 0.050 19 3,400 0.4 350 < 0.1 330 < 50 < 50 6.72 15.46 0.472 -94.8 5.2

3/18/2015 7.94 < 0.050 28 2,400 0.4 400 < 0.1 1,500 1.1 < 0.50 6.55 13.82 0.555 -27.1 6.0

9/22/2015 0.90 < 0.050 17 1,900 < 0.2 270 < 0.1 390 < 25 < 0.50 6.01 15.46 0.495 IE 5.8

3/22/2016 1.53 < 0.050 30 2,000 1.5 310 < 0.1 1,200 < 130 < 2.1 6.15 13.85 0.578 -177.8 6.6

9/20/2016 1.47 < 0.050 30 12,000 0.5 380 < 0.1 1,200 < 20 < 1.7 6.62 15.7 0.566 -35.4 6.4


CI-18-30

CI-19-30

Shallow Zone

CI-16-30

CI-17-30









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)


8/8/2013 0.82 NA NA NA 2 NA < 0.1 NA NA NA 6.77 17.42 0.789 42.5 NA

3/12/2014 0.31 NA NA NA 0.6 NA 0.2 NA NA NA 6.47 15.33 0.359 -7.4 NA




3/22/2016 IE NA NA NA 5.0 NA < 0.1 NA NA NA 6.47 14.51 0.459 -50.4 NA


3/14/2013 0.28 0.095 < 25 19,000 3.6 960 < 0.1 3,600 380 < 250 6.23 14.13 0.526 -58.9 4.6

8/8/2013 0.28 0.10 < 15 18,000 1.2 910 < 0.1 5,500 < 500 < 500 6.78 15.68 0.91 25.4 5.4

3/13/2014 2.83 0.059 33 22,000 2.3 870 < 0.1 3,900 < 500 < 500 6.48 14.13 0.549 -61.4 5.0

9/23/2014 0.82 0.071 < 20 16,000 < 0.2 910 < 0.1 3,800 380 < 250 6.74 18.59 0.583 -134 5.1

3/18/2015 0.85 2.7 25 22,000 < 0.2 930 < 0.1 6,200 180 4.6 6.28 15.55 0.552 -58.8 5.2

9/24/2015 1.77 0.57 < 10 17,000 1.2 870 < 0.1 3,700 < 250 < 1.0 6.33 16.26 0.588 IE 5.1

3/22/2016 0.21 < 0.050 < 25 21,000 2.0 900 < 0.1 4,100 480 2 6.43 14.37 0.568 -56.2 5.7

9/20/2016 0.21 < 0.050 < 10 37,000 4.0 1,000 < 0.1 6,700 360 1.3 6.62 16.3 0.581 -73.1 4.9

3/13/2013 0.39 0.10 31 17,000 3.6 510 < 0.1 330 < 25 < 25 6.30 13.88 0.343 -44 3.1

8/7/2013 0.33 < 0.050 31 17,000 2.6 520 < 0.1 460 < 50 < 50 6.65 17.59 0.594 26 3.5

3/12/2014 1.2 < 0.050 < 5.0 12,000 2.6 430 < 0.1 230 < 15 < 15 6.44 14.56 0.325 -49.1 4.4

9/23/2014 0.67 0.091 < 10 13,000 1.6 430 < 0.1 630 < 50 < 50 6.64 18.98 0.329 -118 3.5

3/17/2015 8.88 0.072 12 11,000 1 400 < 0.1 630 6.2 < 0.50 6.24 15.5 0.29 -26.4 3.2

9/22/2015 0.58 < 0.050 < 5.0 9,100 2.0 330 < 0.1 570 < 50 < 0.50 6.24 16.89 0.242 -94.2 2.8

3/23/2016 0.85 < 0.050 15 12,000 3.5 390 < 0.1 590 < 13 < 1.2 6.34 14.58 0.294 -59.5 2.9

9/20/2016 0.29 < 0.050 5.6 15,000 3.5 390 < 0.1 990 < 9.1 < 1.6 6.60 17.4 0.278 -73.5 3.1

CI-7-40

CI-8-40

CI-9-40

Intermediate Zone









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)

3/14/2013 3.58 < 0.050 19 690 0.6 110 < 0.1 180 < 10 < 10 6.04 13.75 0.283 159 3.3

8/7/2013 2.29 < 0.050 48 1,500 1.2 300 < 0.1 23 < 1.5 < 1.5 6.44 16.57 0.509 119.6 4.3

3/13/2014 8.24 0.17 14 190 0.4 27 < 0.1 8.6 < 0.50 < 0.50 6.26 11.74 0.281 17.5 3.0

9/23/2014 0.8 0.15 41 950 0.2 210 < 0.1 160 < 10 < 10 6.11 16.56 0.318 60.1 4.4

3/18/2015 0.31 0.15 27 4,700 0.4 810 < 0.1 3,600 15 190 6.57 13.61 0.495 -25.1 4.9

9/23/2015 0.66 < 0.050 42 1,100 1.2 330 < 0.1 60 < 3.0 0.59 5.82 16.70 0.334 IE 5.1

3/24/2016 0.62 0.077 28 5,500 2.0 860 < 0.1 3,700 < 73 290 6.50 13.78 0.496 -85.7 4.0

9/21/2016 0.18 < 0.050 25 4,900 1.5 820 < 0.1 2,900 < 75 180 6.79 14.9 0.497 -67.7 5.1




3/18/2015 0.85 < 0.050 < 5.0 3,000 < 0.2 390 < 0.1 4,900 8.3 1.6 6.42 15.54 0.428 -66.7 4.9

9/22/2015 0.19 < 0.050 < 5.0 3,100 3.0 360 < 0.1 4,300 < 250 < 0.50 6.94 17.16 0.415 -210 5.2

3/24/2016 0.09 < 0.050 < 5.0 3,200 2.5 380 < 0.1 6,700 < 100 < 7.8 6.97 15.00 0.418 -105.0 5.3

9/21/2016 0.21 < 0.050 < 5.0 4,400 2.0 420 < 0.1 9,100 < 110 < 7.3 7.12 17.3 0.427 -120.3 4.8

3/13/2013 0.31 0.080 < 5.0 8,200 1.2 610 < 0.1 12,000 < 1,000 < 1,000 6.57 13.72 0.528 -35.5 4.2

3/12/2014 1.18 0.083 < 5.0 8,000 1.4 620 < 0.1 8,000 < 500 < 500 6.74 15.58 0.727 -74.5 4.7

3/23/2016 0.20 < 0.050 < 5.0 6,700 1.5 480 < 0.1 13,000 < 330 < 22 6.84 14.80 0.774 -118.4 6.2

3/14/2013 0.96 < 0.050 < 5.0 1,300 1 170 < 0.1 3,600 < 250 < 250 7.22 15.66 0.432 -132 4.0

3/11/2014 1.65 0.074 < 5.0 750 1.2 180 < 0.1 1,500 < 100 < 100 7.46 13.57 0.436 -95.8 4.2

3/17/2015

3/22/2016




3/28/2017 0.39 < 0.050 < 5.0 NA 2.0 NA NA 15,000 < 280 < 34 7.78 14.0 0.573 -113.6 9.5

CI-11-60

CI-12-60

CI-13-60

CG-141-50

CI-10-65

Intermediate Zone











Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)

3/14/2013 NA < 0.050 < 5.0 3,900 2.8 770 < 0.1 3,800 < 250 150 NA NA NA NA 3.7

8/8/2013 0.31 0.10 < 5.0 4,400 2.2 720 < 0.1 4,100 < 500 < 500 7.26 18.35 0.835 -9.7 4.0

3/13/2014 2.51 0.48 < 5.0 3,300 0.8 740 < 0.1 3,100 < 500 < 500 7.06 16.01 0.56 -85.9 4.1

9/24/2014 0.71 0.061 < 5.0 3,700 0.6 790 < 0.1 NA NA NA 7.29 16.96 0.525 -95.2 4.4

3/19/2015 8.57 < 0.050 < 5.0 3,200 0.2 840 < 0.1 3,600 38 210 6.90 16.2 0.569 -87.7 4.5

9/24/2015 8.25 0.055 < 5.0 3,500 3.0 770 < 0.1 3,500 < 250 270 6.85 19.22 0.564 IE 4.4

3/23/2016 0.24 < 0.050 < 5.0 5,200 2.0 830 < 0.1 5,000 < 140 190 6.98 15.04 0.560 -91.8 5.0

9/21/2016 0.20 < 0.050 < 5.0 7,000 4.0 810 < 0.1 5,600 < 79 170 7.05 17.3 0.553 -119.3 4.6



3/28/2017 0.21 < 0.050 < 5.0 NA 2.0 NA NA 4,400 < 110 < 17 6.73 14.0 0.452 -111.8 5.7

3/14/2013 1.47 0.34 < 5.0 7,100 1.6 690 < 0.1 2,900 < 250 210 6.56 15.61 0.478 -60 4.2

8/7/2013 0.29 < 0.050 < 5.0 7,200 1.6 690 < 0.1 3,500 < 500 < 500 6.91 15.55 0.741 22.4 4.7

3/13/2014 4.9 < 0.050 < 5.0 6,300 0.2 710 < 0.1 730 < 50 66 6.65 12.99 0.489 -60.2 5.2

9/23/2014 0.57 0.57 < 5.0 7,600 < 0.2 720 < 0.1 3,400 < 250 260 6.58 15.12 0.46 -58.7 4.7

3/18/2015 0.4 < 0.050 < 5.0 7,100 0.4 770 < 0.1 5,200 44 260 6.62 14.3 0.495 -48.2 5.4

9/23/2015 0.80 0.36 < 5.0 7,700 1.6 730 < 0.1 3,600 < 250 370 6.20 15.01 0.485 IE 4.7

3/24/2016 1.44 < 0.050 < 5.0 7,100 1.2 720 < 0.1 3,500 < 89 330 6.63 13.98 0.498 -89.3 5.2

9/21/2016 1.05 < 0.050 6.1 8,400 1.0 660 < 0.1 3,100 < 120 150 6.71 15.2 0.490 -57.7 5.4





9/24/2015 6.93 NA NA NA 0.2 NA < 0.1 NA NA NA 7.22 17.07 0.465 IE NA



6/28/2016 .76 NA NA NA 0.25 NA < 0.1 NA NA NA 7.61 18.36 0.485 -129 NA


CI-16-60

CI-20-80

CG-137-50

CI-15-60

CI-14-70

Intermediate Zone









Nitrate2

(mg/l)Sulfate3

(mg/l)Total Iron4

(µg/l)

Total Manganese4

(µg/l)Ethane6

(µg/l)Ethene6

(µg/l)


Ferrous Iron5

(mg/l)Temperature


(mS/cm)ORP (mV)

TOC7

(mg/l)pH

Manganese (II)5

(mg/l)Methane6

(µg/l)

3/13/2013 0.58 0.58 < 5.0 8,300 5 680 < 0.1 6200 1400 1500 6.59 13.71 0.516 -58 3.7

3/12/2014 0.62 < 0.050 < 5.0 8,600 1.6 700 0.1 4000 < 500 < 500 6.69 14.65 0.595 -56 4.2

3/22/2016 1.14 < 0.050 < 5.0 8,700 2.0 670 < 0.1 4800 < 250 1 6.63 14.12 0.568 -65.6 4.8





3/23/2016 0.12 NA NA NA 2.0 NA < 0.1 NA NA NA 6.42 14.33 0.513 -73.5 NANOTES:< denotes analyte not detected at or exceeding the reporting limit listed. electron receptors = compounds that gain electrons and are sources of energy during biodegradation1Collected using a Yellow Springs Instrument multimeter with flow-through cell. ° = degrees2Analyzed by U.S. Environmental Protection Agency (EPA) Method 353.2. IE = instrument error3Analyzed by American Society for Testing and Materials Method D516-02 or ASTM Method D516-07. mg/l = milligrams per liter; equivalent to parts per million4Analyzed by EPA Method 6010C. mS/cm = milliSiemens per centimeter specific conductance units5Measured in the field using conventional chemistry parameters by EPA/American Public Health Association Methods. mV = millivolt units for measurement of oxidation-reduction potential (ORP)6Analyzed by EPA Method RSK-175. metabolic byproducts = compounds that result from biodegradation processes7Analyzed by Standard Method 5310B. TOC = total organic carbon µg/l = micrograms per liter

NA= not analyzed

CI-9-70

CI-7-60

CI-8-60

Intermediate Zone

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