Rocky Mountain Arsenal CCR RER Soil Rernediation - Part I Rev 0 WBS 2,07.35 March 13, 2006 APPENDICES A RMA Site Location Map B 1997 RMA Committee Agreement/April 1998 BAS Meeting Minutes C 2003 RMA Committee Agreement D Soil Tilling Plan forFWS TRER Sites E Assessment Report forTRER Sites 35CC-6 and 1SE-4 El - TRER Site 35CC-6 Assessment E2 - TRER Site ISE-4 Assessment E3 - ARER Assessment for Upper Derby Lake E4 - Remaining BAS Actions Memo F TRER Figures: Fl- TRER Sites Where Excavation Occurred 172- TRER Tilling Demonstration Sites F3- Tilled and/or Sampled TRER Sites G Changes to P1Soil Boundaries H PI Soil Survey Data CD Index

TABLES 1.4-1 RER Soil Sample RiskAnalysis 1.5-1 Contaminants ofConcern 1.6-1 P1 Soil Tracking 2.0-1 Completion ofRER Milestones 4.1.2-1 TRER Soil Tracking 5.3.2-1 PI Volumes 8.2-1 RER Soil Project Records and Documentation 13.0-1 Key Supporting Documents

FIGURES 1.0-1 PI Soil Areas Remediation Status 1.0-2 TRER Sites Remediation Status 4.1.6-1 MEC Recovered in RER Areas 5.3.1-1 Wells Located in P1Soils 5.3.1-2 Wells Located in TRER Areas 5.3.3-1 Rocky Mountain Arsenal RER Revegetation Status

00042585 15207- 3

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N TETRA TECH EC. INCRocky Mountain Arsenal CCR RER Soil Remediation - Part I Rev 0 WBS 2.07.35 March 13, 2006

iv 0247013RER CCR-Rev 0

TETRA TECH EC. INC.Rocky Mountain Arsenal CCR RER Soil Rernediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 EXECUTIVE SUMMARY This Construction Completion Report (CCR) forthe Residual Ecological Risk (RER) Soil Remediation - Part I ofthe Rocky Mountain Arsenal (RMA) Federal Facility Site was prepared in accordance with theU.S. Environmental Protection Agency (EPA) OSWER Directive 9320.2- 09A-P (Close Out Procedures for National Priority.List Sites) (EPA 2000). It is understood that the purpose ofthis CCR is to document completion ofeach remedial action based on the Record ofDecision (ROD) for the On-Post Operable Unit (OU) (FWENC 1996a), and provide abasis forEPA acceptance and Colorado Department ofPublic Health and Environment (CDPHE) concurrence therewith. The CCRwill also beused as supporting documentation for development ofthe Preliminary Closeout Report and Final Closeout Report. The RMA OU is a Federally owned facility located in southern Adams County, Colorado, approxi' mately 10 miles northeast ofdowntown Denver, directly north ofthe fori-ner Stapleton International Airport and west ofDenver International Airport (Appendix A). The RMA OnPost OU currently encompasses 17.2 square miles and is onthe EPANational Priority List for environmental cleanup as a result ofcontamination released during previous operations. The cleanup remedy selected in the ROD includes treatment ofgroundwater and 31 Implementation Projects (IPs) for soil and structures. The RER Soil Remediation - Part Isites are located throughout the On-Post OU ofthe RMA, This CCR documents the iniplementation ofremedial action through September 2005 for Priority I (PI) and Terrestrial Residual Ecological Risk (TRER) soils, by either removal or 3-step tilling and sampling, duringthe RER Soil Remediation - Part 1. PI and TRER soils are areas located outside ofIPboundaries that do not cause concern forhuman health but maypose apotentially unacceptable riskto biota. All remaining PI and TRER site remedies completed after September 2005 will be documented in theRER Soil Remediation - Part 2 CCR. Based on the results ofrisk characterization, RER soils are separated into two categories with different remediation requirements: " PI soil " TRER soil The Program Management Contract (PMC) Quality Assurance (QA)/Quality Control (QC) Department assumed the construction QC responsibilities forremoval ofPI and TRER soil. The Construction Quality Assurance Plans within the approved remedy IP design packages (FWENC 2003b, 2002e, 2001b, 2001c, 200le, 2001f, 2000a, 2000b, 2000d, 2000e, 1999a, 1999b, 1999f, 1998b, 1998c, MK 1998a) were implemented by the PMC and followed by the Subcontractor during all construction activities. As presented in Table 1. 6- 1, 11 IPs removed P1soil within project boundaries or from borrow areas (BAs) foruse as gradefill orbackfill in the Hazardous Waste Landfill, Basin A, orwithin project sites. The TRER sites where soil has been removed by IPs are provided in Table 4.1.2- 1.The use ofPI or TRER soils is tracked by project sites in the Annual Borrow Area Updates. As ofAugust 3,2005, 1,502,574 bank cubic yards (bey) ofP1 soil and 93,336 bey ofTRER soil have been excavated. The PI soil from BAs 4, 7b, and 9a (Parcel 2) remains to be excavated. Of

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TETRA TECH EC. INC.Rocky Mountain Arsenal CCR RER Soil Rernediation - Part I Rev 0 W13S 2.07.35 March 13, 2006 the 42 TRER sites identified in the 2003 RMA Committee Agreement (Appendix C) for remediation, portions of6 sites remain to be remediated. The closure ofthese six remaining TRER sites and three PI areas will be documented in the RER Soil Remediation - Part 2 CCR. Those TRER sites not excavated by IPs were tilled in accordance with the 2003 RMA Committee Agreement and/or sampled in accordance with the Biological Advisory Subcommittee Sampling and Analysis Plan. A Remediation Venture Office (RVO) QC representative inspected and verified completion ofall TRER tilling sites, as documented in the Annual Borrow Area Update project files. - Personal health and safety sampling and analysis were perforrried during removal activities, in accordance with the National Institute for Occupational Safety and Health Manual ofAnalytical Methods. Sample analysis was perfornied by an analytical laboratory accredited by the American Industrial Hygiene Association. The laboratory analysis included field blanks, as required by the individual method or laboratory. Pflor to sampling, the specific sampling and analytical method was discussed with the laboratory to detern-line any special requirements or variations to established methods necessary to collect an acceptable Sample. There have been no reported action level exceedances during removal activities for the RER Soil Remediation - Part

Prefinal and final inspections for IPs perfori-ning removal were conducted in accordance with Comprehensive Environmentýl Response, Compensation and Liability Act guidance and contract specifications to close out the subcontract ofthe remediation Subcontractor. The purpose ofthe inspections was to detern-iine whether the construction was completed in accordance with the subcontract and to determine whether all aspects ofthe plans and specifications were implemented in accordance with the ROD and the approved design package. The prefinal and final inspections were conducted in conjunction with representatives ofthe EPA, CDPHE, the Tri-County Health Department, the PMC Project Team, and the RVO. No caps, covers, or treatment facilities are required by the ROD for this remedial action, therefore no long-tenii operations or maintenance is required. However, the property involved in this remedial action is subject to restrictions on land and water use and will be included in the RMA-wide 5-year reviews ofremedial action. The RVO has determined that this remedial action has been completed and has achieved the intent ofthe ROD to be protective'ofhuman health and the environment. No further action is required on the RER Soil Remediation - Part I sites.

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TETRA TECH EC, INC.Rocky Mountain Arsenal CCR RER Soil Remediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 1.2.3 2003 Committee Agreement In 2003, the RMA Committee reached concurrence on an Agreement (Appendix Q regarding the remediation ofRER soils identified in the TRER report. The Agreement adopted the BAS recommendations for removal or tilling ofthe 42 TRER sites. Twenty-four ofthe sites are located primarily in or adjacent to BAs. For these sites, removal is the preferred remedial approach. However, ifthe soil will not be removed, soil tilling can be substituted to reduce risk to acceptable levels. The tilling method (Appendix D) approved by BAS consists of3 steps, 1) ripping to 18 inches, 2)plowing to 12 inches and 3)discing to 6 inches. The remaining 18 sites are outside BAs and the Agreement states that the 3-step tilling process is the preferred approach to reduce risk to acceptable levels. The original TRER boundaries defined by the BAS are included in the 2003 Committee Agreement (Figure I ofAppendix C). The Agreement also stated that the following actions would be completed: Provide interim documentation ofthe remediation ofTRER sites in the Annual BA Updates, to include the following:

- A summary ofthe soil tilling riskreduction demonstration (Section 5.2.1 Tilling Demonstration Sampling and Analysis Plan [SAP] [TtFW 2004bl was completed in 2004. The TRER Soil Tilling Demonstration Study Report (RVO 2006) was issued in March 2006.

- An evaluation to determine whether institutional controls are needed on PI or TRER soil used as common gradefill outside Arn-iy-retained sites (Sections 5.1.2 and 5.1.3). Only the Previously Excavated Lake Sediments sites from the Miscellaneous Southern Tier Project require institutional controls. Institutional controls available are described in the Interim Institutional Control Plan (PMRMA 2003). Results ofthe PI Backfill SAP are provided in a Data Summary Report (DSR) (TtFW 2004a) and clear all other backfill sites, outside Army-retained areas. Track PI soil to ensure that PI soil with HQ >10 is notused as common gradefill outside ofAnny-retained sites. (PI soil removal and placement operations began years priorto the 2003 RMA Committee Agreement being signed. The RVO reviewed the placement of the PI soil operations prior to 2004 and deten-nined that all Pl soil with an estimated HQ >10 wasplaced inside an Am-ly-retained area. A review ofthe remaining Pl soil indicated that only one area in BA4 remains with a potential HQ >10. TheBA 4 P1 soil isplanned to be placed in Basin F, an Arrny-retained area.) Remedy for site ISE-4 is to include additional sampling at depth, evaluation of biomonitoring data and an aquatic residual risk assessment by BAS (Appendices E2 and E3). 1.3 RER Sites The PI soil sites are shown on Figure 1.0-1. The Pl soil Contaminants ofConcern (COCs) are primarily OCPs and are limited to surficial soil (0 to Ifoot) as identified by the BAS and documented in the 1997 RMA Committee Agreement and all subsequent Annual Borrow Area Updates, including the years 1998 (FWENC 1998a), 1999 (FWENC 1999e), 2000 (FWENC 2000c), 2001 (FWENC 2001d), 2002 (FVvENC 2002d), 2003 (FWENC 2003c), 2004 (TtFW

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N TETRATECH EC. INC.Rocky Mountain Arsenal CCR RER Soil Rernediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 2004c and TtEC 2005a), 2005 (TtFW 2005a and TtEC 2006d), and future Annual Borrow Area Updates, as necessary. The 42 TRER sites (Figure 1.0-2) were identified in 2003 by the BAS after much ofthe soil project remediation at RMA had been completed. The TRER soil COCs are primarily OCPs and limited to surficial soil (0 to I foot) as identified by BAS and documented in the 2003 RMA Committee Agreement and all subsequent Annual Borrow Area Updates, including the years 2004 (TtFW 2004c), 2005 (TtFW 2005a), and future Annual Borrow Area Updates, as necessary. Identification ofthese RER sites for remediation was completed in accordance with the process described in the ROD (FWENC 1996a). Designation ofthese RER sites resulted in completion ofthe ROD-identified requirements for the BAS (Appendix E3). 1A Scope of Project RER Soil Remediation was provided for in the ROD and the 1997 and 2003 RMA Committee Agreements. Per 1997 Committee Agreement, and in accordance with approved IP design packages (FWENC 2003b, 2002e, 2001b, 2001c, 200le, 2001f, 2000a, 2000b, 2000d, 1999a, 1999b, 1999f, 1998b, 1998c, MK 1998), P1 soils have been predominantly used as borrow for gradefill/backfill or taken to Basin A or HWL as waste (Table 1.6- 1). Thus, removal has occurred under a multitude ofdifferent RMA projects since 1998. All P1 areas were required, per RVO direction, to be surveyed prior to and subsequent to excavation. These surveys were perfon-ned by the IPs and placed electronically into the Geographic Information System (GIS). The documentation of removal has been shown in the yearly Borrow Updates. In addition, Basin A Operations and HWL Operations have used PI soils. Basin A Operations and HWL Operations project files containing P1 survey data have been reviewed annually by the Regulatory Agencies prior to archive. Project record reviews for implementing remedy projects are performed afterproject implementation. Per the 2003 RMA Committee Agreement, two acceptable remedies were identified for TRER sites: removal or3-step tilling. In addition, a Tilling Demonstration Study would confinn that 3-step tilling had sufficiently reduced risk. The Tilling Demonstration Study was performed in 2004 with an objective to confirm, through soil samples collected, that concentrations ofOCPs were at or below an HQ of2 afterthe sites were tilled. Seven TRER sites, identified in Appendix F2, were selected and sampled for this study. Sample results confirmed that ecological risks forthe small bird are acceptable in all but one subplot ofthe TRIER sites selected for this study. Sample results for one area, 26NW-5 subplot A, had concentrations resulting in an HQ >2. Based on the results ofthis study, all remaining unremediated TRER sites were sampled to confirm that soil OCP levels were within the effective risk reduction range (2 < HQ :510) ofthe tilling process (Appendix F3). Sites tilledprior to the Tilling Demonstration Study were also sampled to confirm that HQs for these sites have been reduced to an HQ of2 or less. In addition, P1in BA 9C was sampled to determine actual risk. The results are documented in Table 1.4-1 and the RER DSR.

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TETRATECH EC.INC.Rocky Mountain Arsenal CCR RER Soil Retnediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 A 3-step tilling procedure was written by RVO and reviewed by BAS. This procedure is usedby thetilling performer, in most cases USFWS. Prior to tilling a site, a survey is performed in order to provide avisual boundary to the operator in the field. Quality Control inspection and documentation wereperformed by RVO QC and placed in the BA project files, maintained by the Program Management Contractor (PMC). Ifa TRER site is removed rather than tilled, itis documented in the same manner as PI soil removal. The site is surveyed prior to and following removal. The survey data are placed in the implementing project file and the inforn-iation is transmitted to GIS. In most cases, TRER sites have been removed by theBasin A Operations project. Remediation tasks performed aspart ofthe RER Soil Remediation - Part I are listed below for PI and TRER soils. Remediation goals, standards and criteria are addressed in Section 3.0. The scope ofwork forremoval ofPI and TRER soils by the implementing projects involved the following common elements: construction ofa temporary site access road, construction of stormwater and sediment controls, removal oftemporary site access road, final grading and revegetation ofdisturbed sites. The scope ofwork for TRER soil tilling included apretilling survey, and inspection to document post-tilling completion and revegetation. The scope ofwork forTRER soil sampling included use ofthe existing BAS RER SAP (USFWS/FWENC 2000), preparation ofsampling grid, surficial soil sample collection, laboratory analysis and preparation ofa RER DSR. Three types ofsoil sampling activities were performed. Some TRER sites were identified as part ofthe BAS Tilling Demonstration effort and were sampled aftertilling was completed. All remaining TRER sites that had not been removed were sampled either before or after tilling was performed. The PI andTRER soil remediation elements are outlined below. 1.4.1 PI Soil " Excavate andhaul to HWL or Basin A. " Excavate and place as backfill or subgrade at implementing project site and cover with a minimum of2feet ofclean soil. PI soil with HQ >10 will only be used as backfill/gradefill at Army-retained areas. " Sample PI sites not already removed to determine actual risk level (sampling results with an HQ:!ý2 require no further action). 1.4.2 TRER Soil " Excavate and haulto HWL or Basin A. " Excavate andplace as backfill or subgrade at implementing project site and cover with a minimum of2feet ofclean soil. TRER soil with HQ >10 will only be used as backfill/gradefill at Army-retained areas. " Perform 3-step tilling at BAS-identified areas.

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TETRATE CH EC.INC.Rocky Mountain Arsenal CCR RER Soil Rernediation - Part I Rev 0 WBS 2.07.35 March 13, 2006

0 Sample TRER sites not excavated to demonstrate tilling effectiveness, or to determine actual risk level (sampling results with an HQ :ý2 require no further action). 1.5 Contaminants of Concern The COCs identified were determined in accordance with the BAS and pursuant to the ROD (FWENC 1996a). Table 1.5-1 lists the COCs that were selected for the TRER and P1soils that comprise RER Soil Remediation - Part 1. The Pl and TRER samples collected were analyzed using the appropriate analytical suite for compounds associated with the identified COCs and at the detection level sufficient to detect a todrin HQ <2. Biota risk exceedances were determined by arisk-based calculation that accounted for aldrin/dieldrin levels only. Table 1.5-1 Contaminants ofConcern Sites coc Corresponding Analytical Suite PI and TRER Aldrin 0CPS Dieldrin 1.6 Refinement of RER Site Boundaries Modifications have been made to RER soil boundaries based on physical features, ROD boundaries, and BAS recommendations. The RER soils are sites with potentially remaining biota risk outside oftheROD-identified contamination sites. Although the BAS model was designed to account forROD remedy sites and physical features (e.g., roads, sewage lagoons, etc.), delineation ofPI and TRER boundaries were originally drawn without adjustment for these features orboundaries. The BAS provided the initial boundaries ofPI soils to the RVO Borrow Team in 1997 and these areas were adopted by RMA Committee Agreement in 1997 (Appendix B). It soon became apparent that PI soil boundaries were extending onto roads, regularly maintained (graded) ditches, adjacent ROD boundaries, facilities (e.g., the zero discharge wastewater treatment lagoon), and other sites. In coordination with the BAS, the RVO began to adjust PI boundaries to account for those sitesthat were not PI soil (BAS 1998) (Appendix B). In sites where PI boundaries did not match adjacent ROD boundaries, the PI boundaries were modified to be contiguous. This eliminated overlaps (double counting) and orphan islands ofsoil. In consideration ofthe future National Wildlife Refuge, BAS has consistently recognized and recommended the retention ofvaluable ecological habitat rather than excavation ofmodeled RER risk sites. Three examples are: 1) BA 8wasmoved from its original location to the West in order to retain unique riparian soils and vegetation along theFirst Creek corridor; 2)BA3tree grove was left undisturbed to retain existing nesting habitat for raptors; 3) Rattlesnake Hill was left undisturbed toretain theunique soil/plant community associated with the Petrocalcic Paleustoll soil classification that israre at RMA. The BAS meeting minutes from April 1998 provide documentation ofrecommendations from BAS regarding habitat value in sites designated for P1removal. One global recommendation was to avoid removing trees during PI removal operations (BAS 1998). Removal ofRER soils was stopped at tree driplines to avoid killing trees.

10 0247013RER CCk-Rev 0

TETRA TECH EC. INC.Rocky Mountain Arsenal CCR RER Soil Remediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 The TRER sites were remediated either by removal (in the same manner asP1)orby tilling and sampling during USFWS revegetation efforts. Ifthe TRER area was within an active BA orwill be disturbed, removal is the preferred remedial alternative. As identified in the BAS TRER report (BAS 2002), removal ofthe highest soil concentration areas (identified asP2 soils) will reduce the risk in the entire TRER site to an acceptable level, and the entire TRER site will be remediated. This affected the excavation boundary for areas 26SW-1, 26WC-2, 31EC-1, 31EC-2 and36EC-1. Final excavation boundaries are shown in Appendix Fl. In cases where composite sampling was performed and resulted in an area identified with HQ >2, the entire area, as identified in the 2004 Borrow Update (ISE-4, 6NW-3, 26SE-7, 35SE- 1,and 36NE-3) was excavated. Equipment identified in the project-specific removal plans was used to stockpile and/or remove contaminated soil. Haul trucks were used to transport contaminated soil to Basin A, HWL or withina project site. Ifrequired, water was sprayed into the removal area for dust suppression. Transport ofPI and TRER soil to project sites for backfill or to on-site disposal facilities was done in accordance with project plans and specifications (e.g., dust control, odor control). Prior to removal, the boundary ofeach RER site was surveyed and staked. Upon completion, the removal was surveyed to verify that proper depths were achieved. Appendix H contains the survey data for removal ofPI soil from all RER sites, excluding the CAMU. Survey data for the CAMU is located in the project files, as identified in the CAMU CCR (RVO 1998, FVv`ENC 2000a). As ofAugust 3,2005, a total of 1,502,574 bey ofPI soil had beenremoved and used as backfill in implementing project sites or disposed ofin the HWL or Basin A. The volume ofPI for each BA or IP ispresented in Table 5.3.2-1 and in the Annual Borrow Area Updates. The final disposition ofP1soil is provided in Table 1.6- 1.Figure 1.0- 1illustrates PI soil remedy status. Ofthe 42 sites identified by the BAS in the 2003 Committee Agreement, a complete or partial removal was performed at 10 TRER sites (ISE-4, 6NW-3 [south and west], 26SE-7, 26SW-1, 26WC-2, 31 EC-1,31 EC-2, 35SE- 1,36EC- 1,and 36NE-3 [north]). Portions ofsix TRER sites (subplots) remain to be excavated (26NW-5-A, 26WC-3-A, 35WC-4-F, 36NE-3 [north of8'h], 36NW-4-B, and 36NW-5-A). All subplots, except for the area in 36NE-3, were identified via sampling (Table 4.1.2-1). The completion ofthese six sites will be documented in the RER Soil Remediation - Part 2 CCR. Table 4.1.2-1 provides the status ofall TRER sites, including remedy method performed to date, removal volume (93,336 bey), and whether remedy action is complete. 4.1.3 Backflll and Grading The ITS have consistently required placement ofa minimum of2feet ofclean borrow soil over RER used asbackfill or designed foruse in covers. RER soil with an HQ >10 was only used as backfill/gradefill in Army-retained areas. No backfill isrequired for excavated RER sites. 4.1.4 Monitoring Well Closures Monitoring wells were closed by separate Subcontractor(s) responsible for monitoring well abandonment on a RMA-wide basis in accordance with the Long-Term Monitoring Plan. All well abandonment activities were supervised by the Well Abandonment team. All wells were

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TETRA TECH EC, INC.Rocky Mountain Arsenal CCR RER Soil Rernediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 abandoned in accordance with the Specifications and Drawings for the subcontract. Well closures were coordinated to minimize impact on the remediation ofthe contaminated soil. 4.1.5 Revegetation Final revegetation ofborrow sites only occurs after the BA is closed. Revegetation ofRER soils removed as part ofan implementing project was usually performed by USFWS. Support is provided by aseparate subcontractor as needed. Support services, ifany, usually consisted of the application and crimping ofmulch after seeding. PMC personnel provided subcontract management and technical/field oversight ofsubcontractor revegetation activities. Revegetation technical oversight included theproper anchoring ofhay mulch and ensuring the use ofcertified weed-free seed and hay mulch. These sites will receive permanent revegetation by the USFWS in accordance with the Habitat Restoration Plan (USFWS 1999). Figure 5.3.3-1 shows the status ofrevegetation at RER sites. .kftercompletion ofTRER tilling activities, theUSFWS revegetated or managed the area for weed control. Revegetation included seedbed preparation, seed placement, anchoring ofhay mulch, and use ofcertified weed-free seed and haymulch. 4.1.6 Unexploded Ordnance (UXO) Tracking Five Munitions and Explosives ofConcern (MEQwere recovered during the removal ofsoilsor found within Magazines at RER sites, which is documented as follows: 0 M16 igniter (UXO Emergency Response #121)found in BA 3. 0 High Explosive-filled M14 burster (UXO Emergency Response #345) found in BA 9A, Parcel 4. 0 4.2 inchburster found in TRER Site 36NE-3. 0 Magazine 1609 - one 75 minbrass cartridge withprimer (BA6) 0 Magazine 1610 - an M74 10 lb. incendiary bomb (BA 6) Following the recovery ofapartial M14 burster during soil stockpiling, UXO oversight was provided to support the project. Prior to allowing additional excavation, UXO personnel conducted a surface sweep ofthe site. Once soil excavation resumed, UXO personnel began visually screening the soil as it was loaded fortransport. When UXO personnel determined the amount ofmetal debris could no longerbe effectively screened under the process inplace, excavation operations were altered to the following: the subcontractor distributed the soil in onefoot lifts, UXO personnel swept each lift with magnetometers, and all identified anomalies were characterized and removed. PMC UXO personnel were present during stockpiling and loadout. During the screening process, no additional MEC were recovered. The MEC items were characterized, removed and tracked per RMA protocols. Figure 4.1.6-1 shows the locations oftherecovered MEC. 4.2 Project Modifications No contract modifications were issued as a result ofRER remedy activities. All modifications to RER boundaries or exemptions are documented in the Annual Borrow Area Updates. 16 0247013RER CCR-Rev 0

TETRA TECH EC.INCRocky Mountain Arsenal CCR R-ER Soil Rernediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 7.6 Natural Resources The PMC consulted with theUSFWS and BAS throughout field work in RER soil areas. The USFWS and BAS removed some sensitive habitat sites from RER soil areas to avoidtheir being disturbed by removal or tilling and adversely impacting native vegetation or wildlife. Examples ofsites removed from disturbance included limiting removal beneath the dripline oftrees, refraining from excavating prairie dog habitat, and excluding sites due to valuable habitat. 8.0 INSPECTION DOCUMENTATION 8.1 Prefinal Inspection Meeting The PMC conducted a Prefinal Inspection Meeting and Site Inspection for IPs, which included RER soil removal. These meetings were conducted in conjunction with representatives ofthe PMC, RVO, EPA, and CDPHE. The Prefinal Inspection results are found in the implementing project files. 8.2 Final Inspection Meeting In accordance with the Remediation Design and Implementation Schedule (RDIS) (PMRMA 2005), a final inspection meeting was conducted for all implementing project sites. A list of items remaining to be completed by the Subcontractor atthat time was reviewed and any outstanding actions identified in apunch list. The meeting representatives concluded that the remediation had been performed in accordance with the approved contract documents, and that the completion ofthepunch list items would constitute project completion. The project punch list was updated through completion by the PMC Construction Engineer for theproject. A complete list ofIPs implementing PI and TRER soil removal and their final inspection meetings is presented in Table 8.2- 1. No final inspection ofTRER sites by the Agencies was required for sites that were not excavated. An RVO QC representative inspected and documented each tilled TRER area at completion, as documented in the PMC borrow project files. 8.3 Final Records Review In accordance with the RDIS, aproject final records review was performed by the EPA and CDPHE on each IP that removed P1 and TRER soils. The records review included the volume verification surveys, as-builts, Professional Engineer and Licensed Surveyor certification, statements, survey logs, corrective action reports, design changes and modifications, and supporting daily and weekly QA/QC summaries. The dates ofthe record review for each IP and PI associated withthose projects are provided in Table 8.2- 1. 9.0 LONG-TERM OPERATION AND MAINTENANCE/MANAGEM ENT REQUIREMENTS No caps, covers, or treatment facilities are required by the ROD for these remediated sites, therefore no long-term operations or maintenance isrequired. Future revegetation ofPI and TRER soils is described in the 2005 Vegetation Management Plan (TtEC 2005) and all future annual Vegetation Management Plans. However, the property involved in this project is subject to restrictions on land and wateruse and will be included in the RMA-wide 5-year reviews of remedial action.

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10.0 SUMMARY OF PROJECT COSTS The costs associated with removal ofPI and TRER sites are incorporated into the IP and are not broken out. The costs for each IP areprovided in the project CCRs and project files. Costs associated with the 3-step tilling process are part ofthe USFWS habitat restoration program. 11.0 LESSONS LEARNED The overarching lesson learned for the RER Soil Remediation - Part I effort was to identify and realize the benefits ofintegrating remediation and restoration goals to more efficiently and effectively achieve remedy closure ofthese sites. Examples ofthis integration approach include the following: 0 Defining the BA boundaries to correspond with sites ofRER soil contamination. This approach enabled those sites requiring remediation to be excavated concurrently with borrow soilsneeded by other remediation projects.

- 'Implementing a pretilling sampling program to further define the biota risk associated with TRER sites. This approach resulted in a reduction in the size and number ofRER sites which require remediation. 0 Implementing a 3-step tilling process for TRER sites as an alternative to soil removal. This approach resulted in retention oftopsoil and using thetilling process as part ofthe habitatrestoration process at the RMA. 12.0 RER PROJECT CONTACT INFORMATION Direct all questions related to theproject to: Mr.Bruce Huenefeld, Remedy Execution Manager Department ofthe Ariny Base Realignment and Closure 7200 Quebec Street, Building 111 Commerce City, CO 80022-1748 (303) 289-0520 EPA Project Manager: Ms. Laura Williams, Project Manager United States Environmental Protection Agency Region 8 999 181h St., Suite 300 Denver, CO 80202-2466 (303) 312-6660 Primary Responsible Party (PRP) Contractor: Mr. James Ruimerman, Deputy Program Manager Tetra Tech EC, Inc. 72nd and Quebec Street 24 0247013RER CCR-Rev 0

N TETRA TECH EC.INC,Rocky Mountain Arsenal CCR RER Soil Remediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 2001f(Jan) BuriedM- IPitsSoilRemediationProject100 Percent DesignPackage. Revision 0. 2000a (Sept) CAMU SoilsRemediation CompletionandSupportProject,Construction CompletionReport.Revision 0. 2000b (Aug) SecondaryBasinsSoilRemediationProject100PercentDesignPackage. Revision 0. 2000c (Aug 9) BasinFExterior RemediationProject100PercentDesignPackage.Final. 2000d (Apr 5) BorrowAreasandPriorityI Soil TrackingPlan2000 Update.Revision 0. 2000e (Jan) MiscellaneousRMA StructureDemolitionandRemovalProject,100 PercentDesignPackage.Revision 0. 1999a (Dec) BurialTrenchesandMunitions(Testing)SoilRemediationProject Phase, 1 1.Revision 0. 1999b (Oct) South Plants StructuresDemolitionandRemoval - PhaseIT 100Percent DesignPackage.Final. 1999c (Sept 30) Site-WideAir QualityMonitoringProgramPlan.Revision 0. 1999d (July 9) Site-Wide OdorMonitoringProgramPlan.Revision 0. 1999e (Apr 9) Borrow AreasandPriority I Soil TrackingPlan1999 Update,Final Report,Revision 0. 1999f(Mar) BasinA Operations Plan.Revision C. 1998a (Oct 13) Borrow AreasPlan.Revision 1. 1998b (Oct) MiscellaneousNorthernTier,MiscellaneousSouthern Tier,andLake SedimentsRemediationProject100PercentDesignPackage.Revision 0. 1998c (Aug.24) Existing(Sanitary) LandfillsRemediationProject100PercentDesign Package. 1996a(June) Recordof Decisionforthe On-PostOperableUnit.Final.(Volume 1). 1996b (July) SupplementalFieldStudy - PhaseIProgram Results 1996c (Sept) SoilQuantityCalculationSummaryReport MK (Morrison Knudsen Corporation) 2000 (Jan) InteractiveComprehensiveAirPathway Analysis,AnnualScreening Analysisfor Year2000Projects. 1998a FinalDesignSpecificationsandDrawingsforthe CAMU Soil RemediationProject. 1998b (Sept 30) CorrectiveActionManagement Unit(CAMU) SoilRemediation, ConstructionCompletionReport.Final. PMRMA (Program Manager Rocky Mountain Arsenal) 2005 (Nov) RemediationDesignandImplementationSchedule

0247013RER CCR-Rev 0 29

TETRA TECH EC.INC,N

Rocky Mountain Arsenal CCR RER Soil Rernediation - Part I Rev 0 WBS 2.07.35 March 13, 2006 2003 (Feb) InterimInstitutionalControlPlan.Final. RVO (Remediation Venture Office) 2006 (Mar) TRER Soil TillingDemonstrationStudy Report.Revision 1. 2003 (Sept) ContingentSoil Volume Procedure Samplingand AnalysisPlan.Revision 2. 2002 (Aug 22) ContingentSoil Volume Procedure. Revision 2. 1998 (Sept 30) Corrective Action Management UnitSoilRemediation Construction CompletionReport.Final. Skipper, Sherry 2004 (June 30) CompactDiskcontainingthe updatedTRER boundaryrefinements. Hand deliveredwith an electronicmailtransmittalfromSherrySkipperto the BAS members TtEC (Tetra Tech EC, Inc.) 2006a (Feb 2) BorrowAreasManagement DataSummary ReportforResidual Ecological Risk Sites. Revision 1. 2006b (Jan 3 1) DataSummaryReportforSand CreeklateralSoilsRemediationProject. Revision 0. 2006c (Jan 12) NorthPlantsSoilRemediationProject WesternParcel PISoil Remediation VerificationDataSummaryReport.Revision 0. 2006d (Jan 9) Errata Pages- Final BorrowAreasandResidualEcologicalRiskSoil TrackingPlan,2005 Update.Revision 0. 2005a (Nov. 29) Errata Pages- AppendixD of the BorrowAreasandResidual Areasand ResidualEcological Risk Soil TrackingPlan,2004 Update,Revision 1. 2005b (June 23) Soil TillingDemonstration DataSummaryReport.Revision 0. 2005c (Apr 26) Site-WideAirandOdorMonitoring PlanforYear2005 ProjectswithAir PathwayAnalysis. Revision 0. 2005d (Apr 15) 2005 VegetationManagementPlan.Revision 0. TtFW (Tetra Tech FW, Inc.) 2005a (Apr 12) BorrowAreas and ResidualEcological Risk Soil TrackingPlan2005 - Update.Revision 0. 2005b (Mar. 30) WellAbandonment SummaryReport2004,Final,Revision 0. 2004a (Dee 7) BorrowSitesManagementResidualRiskSoil ConcentrationVerification forPIBorrowusedinNorthPlants(NP) ChemicalSewerandSection36

Existing(Sanitary) LandfillProjects(ESL36)DataSummaryReport (DISR), Revision 0. 2004b (Oct 11) Final ResidualRiskSoil ConcentrationVerificationSamplingand AnalysisPlanSoil TillingDemonstrationStudy. Rev 1. 30 0247013RER CCR-Rev 0

N TIETRATECH EC,INC.Table 5.3.2-1 P1 Volumes 1998 Remainino, Survev Index Estimated n I Exempt Desiv Desig volume n., Number (s) Volume Volume (2) Volume -H) Removed Volume' (AppendLx BorroNv Area (bcv) - (bcv (bcý (bcy) (bcv- (bcý,) 3 329,051 296,331 1,400 340,832 0 1-23 4 321,840 304,500 0 304,500 NA 5 62,754 59,100 1,000 67,989 0 24 6 100,595 100,768 121,137 -0 25-27 7A 100,382 100,647 116,379 0 28-41 7B 50,369 48,028 54,542 2,581 42-44 8 46,843 36,010 44,081 0 47 9A 81,665 79,148 104 56,950 21,583 48-51 9C (1) 80,020 29,568 41,094 0 53-55 11 142,740 144,232 176,346 0 56-57 12 38,333 38,333 44,271 0 Note (3) PI Soil Stockpiles NA NA 6,031 NA NA Subtotal 1,354,592 1,236,665 2,504 1,069,652 328,664 Project P1 SoilRemediation CAMU Soil Remediation Project 207,442 254,584 0 Note (3) CAMU Soil Remediation Project (RCRA-Equivalent TestPlots) 3,411 3,931 0 Note (3) CAMU Soil Remediation Project (North Access Control Area) 13,744 16,795 0 Note (3) Existing (Sanitary) Landfills Remediation - Section 1 10,308 11,930 0 58-59 Misc. Southem Tier Soils (SSA2a) 5,268 5,919 0 56-57 Misc. Southern Tier Soils (Fisherman's Parking Lot) 4,015 4,367 0 60 Secondary Basins Soil Remediation Project 19,758 23,558 0 1-23 Section 35 Soil Remediation 29,222 36,781 0 1-23 Existing (Sanitary) Landfills Remediation - Section 36 2,637 3,125 0 46 North Plants Structures Demolition and Removal (Chemical Sewer) NA 4,316 0 Note (4) South Plants Soil Remediation (Phase II) (Outside BA 11 Boundary) 6,271 6,473 0 56-57 Section 36 BOA 41,299 57,921 0 62-68 CAMU Soil Remediation Project (ELF Construction Project - Section 25) 2,995 3,222 0 61 Subtotal NA 34 X0 NA 432,922 0 Total 1,354,592 1,583,035 T- 2,504 1,502,574 328,664 Notes: (1) Approximately 68,192 bcy ofsoil from BA 9C was redesignated as 'clean' based on sample results. (2) Refer to Section 1.6 for Boundary Refinements (3) Survey documented in the CAMU soil removal CCR (MK 1998b) (Ref.Table 8.2-1) (4) Survey documented in the NorthPlants Structures Demolition CCR (TtFW 2004h)Table 8.2-1: RER Soil Project Records and Documentation

Fli%iorityl Scmrces and Subcontractor inspection Date Rerords Review DaTteSurvey PrDýect Fi[e Lcc;ation lmpýementation Pro)ect

Borrow Area 3 Buried M-1 Pits Soil Rernediation Geo-Con I-Nov-01 22-Jan-02 Basin A - 20.4.3.1 Basin A and HWL Operations Envirocon Jan-02 9-Apr-03 Basin A - 20.4.3.1 Secondary Basins (Part 2) Soil Rernediation (north) Weston 26-Feb-03 29-Jul-03 SBSRP-1 1.11.7 Secton 35 Soil Rernediation (haul road) Weston 26-Feb-03 29-Jul-03 S35-11.11.7 Section 35 Soil Rernediation (sewerin Causbc Basin) Weston 26-Feb-03 29-Jul-03 S35-11.11.7 Basin A and HWL Operations Envirocon Nov-03 22-Jun-04 Basin A - 20.4.3.5 Borrow Area 4 Basin F Gradefill TBO TBD TBID TBD Basin F Rernediation (RCRA-Equivalent Cover) TBD TBD TBID TBD Borrow Area 5 CAMU Soil Remediation Nielson's 16-Dec-99 20-Jan-00 CAMU -10.2.1.2.19 - 28 Miscellaneous RMA Structures Dernolibon (Phase 11)' Envirocon, ECC 2-Mar-05 1 MS - 11.11.7 Borrow Area 6 CAMU Soil Rernediation Nielson's 16-Dec-99 20-Jan-00 CAMU -10.2.1.2.19 - 28 North Plants Structures &rnolition Envirocon, ECC 4-Jun-03 12-Nov-03 NPD-1 1.11.8 Basin A and HWL Operations Envirocon Sep-03 22-Jun-D4 Basin A - 20.4.4.1 Borrow Area 7A CAMU Soil Remediation Nielson's 16-Dec-99 20-Jan-00 CAMU .10.2.1.2.19 - 28 North Plants Structures Dernollbon Envirocon, IT 4-Jun-03 12-Nov-03 NPD-1 1.11.8 Basin A and HWL Operations Envirocon Jan-04 3-Mar-05 Basin A - 20.4.1.2 Borrow Area 7B Existing (Sanitary) Landfills Rernediation - Section 36 ECC 26-Aug-03 18-N.v-03 ESL36-11.11.7 Basin A and HWL Operations Envirocon IT TBD TBE TBD Borrow Area 8 Basin A and HWL Operations Envirocon Jun-04 3-Mar-05 Basin A - 20.4.5.1 Borrow Area SA Basin A Operations (Parcel 1) Weston, West Hazmat Jun-03 3-Mar-05 Basin A - 20.4.9.1 Miscellaneous RMA Structures Demolition (Phase 11) (Parcel 3) Envirocon 2-Mar-05 19-Apr-05 MS - 11.11.7 Section 36 BOA (Parcel 3) Envirocon Dec-134 16-Aug-05 S36BOAS 11.5.2.17 Basin A Subgrade (Parcels 2) TBD TBID TBD TBD Basin A Subgrade (Parcels 4) Envirocon TBD TBD BASG - 11.13.3 Borrow Area 9C Basin A Subgrade Envirocon Jul-05 18-J:n-06 BASG -11.13.3 Section 36 BOA Enviroc Jul-( 18-J n-06 S36BOA - 11.13.3 Borrow Area 11 South Plants Soil Remed-iation (Phase 11) URS 4-Jun-03 11 -Sep-03 SPSP2-24.0 Borrow Area 12 CAMU Soil Rernediation Nielson's 164)ec-99 20-Jan-00 CAMU -10.2.1.2.19 - 28

Tables-8(1).2_1_Projecý_Records-and-Document4on-Revised I of2Table 8.2-1: RER Soil Project Records and Documentation

Priority 1 SDUrces and Subcontraclor Inspection Date Records Review Date Survey Project File Lcaaýon nrplernen.ýation Pnzteýt PI Soil Stockpiles 1 stockpile west ofNorth Plants Haul Road Envirocon 4-Jun-03 12-Nov-03 NPD-1 1.11.8 3 stockpiles in BA 9C Envirocon Jan-03 18-Jan-D6 S36BOAS 11.5.2.17 1 stockpile in BA 9A east ofNorth Plants Haul Road TBD TBD TBD TBD Project P1 Soil Remedlation CAMU Soil Remediation Project Nielson's 16-Dec-99 20-Jan-00 CAMU -10.2.1.2.19 - 28 CAMU Soil Remediation Project (RCRA-Equivalent Test Plots) Nielson's 16-Dec-99 20-Jan-00 CAMU -10.2.1.2.19 - 28 CAMU Soil Remediation Project (North Access Control Area) Nielson's 116-Dec-99 20-Jan-00 CAMU -10.2.1.2.19 - 28 Existing (Sanitary) Landfills Remediation - Section 1 ECC 20-Sep-99 14-Jan-00 ESI-011-11 1.01 Misc. Southern Tier Soils (SSA-2a) Nielson's 7-Oct-99 29-Sep-99 MSTSR-1 1.5.1 and 8.10 Misc. Southern Tier Soils (Fisherman's Parking Lot) Nielson's 7-Oct-99 29-Sep-99 MSTSR-11 1.5.2.6 CAMU Soils Remediation Nielson's 16-Dec-99 20-Jan-00 CAMU -10.2.1.2.19 -28 Secondary Basins Soil Remediation Project Weston, ECC 12-Sep-01 9-Jan-02 SBSRP-1 1.11.7 Section 35 Soil'Remediation Weston 26-Feb-03 29-Jul-03 S35-11.11.7 Existing (Sanitary) Landfills Remediation - Section 36 ECC 26-Aug-03 18-Nov-03 ESL36-11.11.7 North Plants Sýuctures Demolition (Chemical Sewer) Envirocon, ECC 4-Jun-03 12-Nov-03 NPD-11 1.11.8 South Plants Soil Remediation (Phase 11) (Outside BA 11 Boundary) URS 4-Jun-03 11 -Sep-03 SPSP2-24.0 CAMU Soil Remediation Project (ELF Construction Project- Section 25) Nielson's 3-Aug-03 25-Jan-05 Basin A - 20.4.8.2 Section 36 BOA Envirocon 12-Apr-05 18-Jan-06 S36BOA - 11. 13.3 TRER Soil Remedlation 1SE-4 (MISTS Deep Acute) Envirocon 12-Nov-04 18-Jan-06 MISTS - 11.13.3 6NW-3 (South Plants [Phase 111) URS Jun-03 1 1-Sep-03 SPSP2-24.0 26SE-7 (Basin F Exterior) Envirocon Jan-03 13-May-03 BFE-11.5.2.14 26SW-1 (Basin A) Envirocon NA 3-Mar-05 Basin A .20.4.3.5 26WC-2 (Basin A) Envirocon NA 3-Mar-05 Basin A -20.4.3.5 31EC-1 (Basin A) Envirocon NA 3-Mar-05 Basin A - 20.4.2.2 31EC-2 (Basin A) Envirocon NA 3-Mar-05 Basin A - 20.4.2.2 35SE-1 (Section 35) Weston 26-Feb-03 29-Jul-03 S35-11.11.7 36EC-1 (Basin A) Envirocon NA 3-Mar-05 Basin A - 20.4.1.2 36NE-3 (Basin A) Envirocon NA 3-Mar-05 Basin A - 20.4.1.2 P1 = Priority 1, CAT = Complex Army Trenches, CAMU Corrective Action Management Unit, BOA Balance ofAreas

Note: Referto Appendix H for Complete Survey Data

Tables-8(l).2_1 _Project_Records-and-Docuinentadon_Revised 2 of2APPENDIX H- Pl SOIL SURVEY DATA COMPACT DISC INDEX (RESIDUAL ECOLOGICAL RISK SOIL REMEDIATION PART 1 (FINAL) CONSTRUCTION COMPLETION REPORT (CCR), REVISION 0) Author(s): TETRA TECH EC, INC

Date: 03/27/2006

THIS DOCUMENT IS A CD-ROM.

DATA HAS BEEN COPIED TO IMGSRV. TO VIEW THIS DATA PLEASE SEE THE IMAGING ADMINISTRATOR OR IMAGING MANAGER.

IIIIIIIIIIIIIIIIIII III 00042586 15207 4**Borrow Area / or Section** Survey File No. **Associated Pre/Post Excavation Files Design Boundary Files**  **Soil Type** Borrow Area 3 and Section 35 1 2a_HH3.xls SECT 35 P1 BOUNDARY.xls P1 2 0203 BA 3 So Far in support of CCRs.CSV 3 Addl P1 Sec 35.xls 4 BA-3 Post ex.xls 5 CADD 012403 Borrow 3 Central P1 Removal Sub 075.xls 6 CADD 031125 BA-3 North P1 soil removal Sub 080.xls 7 CADD 031203 Borrow Area 3 Central P1 Removal Sub 075.xls 8 CADD 040303 Borrow 3 Central P1 Removal Sub 075.xls 9 CADD 050503 Borrow 3 Central P1 Removal Sub 075.xls 10 CADD 052703 Borrow 3 Central P1 Removal Sub 075.xls 11 CADD 083002 Borrow 3 South P1 Removal Sub 072.xls 12 CADD 111202 Borrow 3 South P1 Removal Sub 073.xls 13 NCSA-2a #3 11-18-02 (REV. 1).xls 14 North Central P1.xls 15 P1 Offsets.xls 16 Sec 35 NE P1.xls 17 SEC 35 P1 East.xls 18 SEC 35 P1 South East.xls 19 Sec 35 Surf Biota #1.xls 20 Sec 35 Surf Biota #2.xls 21 Sec 35 Surf Biota #4a.xls 22 m1-pits-pre and post.xls 23 Sec Bas P1 Rev 1.xls Borrow Area 5 24 836.xls BA5-P1 DESIGN BOUNDARY.xls P1 Borrow Area 6 25 BA-6 Post-HSI.xls P1-BA6-BOUNDARY.xls P1 26 P1BA-6.xls 27 BA6-SUPPLEMENT-EXCAV-DATA.xls Borrow Area 7A 28 020201 Borrow 7A Interim P1 Removal Sub 046.xls P1-BA7A-BOUNDARY.xls P1 29 031501 Borrow 7A Interim P1 Removal Sub 047.xls 30 040302 Borrow 7A Interim P1 Removal Sub 066.xls 31 092501 Borrow 7A Interim P1 Removal Sub 054.xls 32 102201 Borrow 7A Interim P1 Removal Sub 060.xls 33 CADD 033103 Borrow 7A Interim P1 Removal Sub 062.xls 34 CADD 041001 Borrow 7A Interim Post Excavation Sub 050.xls 35 CADD BA-7 Post P1 Survey Report Sub.87A.xls 36 CADD 050902 Borrow 7A Post Excavation Sub 070.xls 37 CADD 071900 Borrow 7A Interim Post Excavation Sub 040.xls 38 0206 BA 7a & b in support of CCRs.CSV 39 0209 BA 7a &b Adds in support of CCRs.CSV 40 CADD BA-7Apost Sub 093.xls**Borrow Area / or Section** Survey File No. **Associated Pre/Post Excavation Files Design Boundary Files**  **Soil Type** 41 suppl-pre-ba7a.xls Borrow Area 7B EAST 42 7BEAST Pre and Post Excavation Reports.xls P1-BA7Be-BOUNDARY.xls P1 43 0206 BA 7a & b in support of CCRs.CSV 44 0209 BA 7a &b Adds in support of CCRs.CSV Borrow Area 7B WEST 45 7BWEST Pre and Post Excavation Reports.xls P1-BA7Bw-BOUNDARY.xls P1 P1-STRIP-7B-E&W 46 ESL SECT 36 B1& P1-1.xls P1-BA7B-E-W-STRIP-BOUNDARY.xls P1 Borrow Area 8 47 BA-8_post Sub091.xls P1-BA8-BOUNDARY.xls P1 Borrow Area 9A 48 9A P4 POST.XLS P1-BA9A-BOUNDARY.xls P1 49 080403 Complete Post.xls 50 BA 9A P3 (Pre and Post Ex Report).xls 51 CADD030804 BA9A P1 Soil Removal.xls Borrow Area 9C 52 BA_9C_Post2.XLS P1-BA9C-BOUNDARY.xls P1 Borrow Area 9C Misc. 53 793.xls BA9CMISC-DESIGN BOUNDARY.xls P1 54 794.xls 55 795.xls Borrow Area 11 56 Borrow11 Report.xls P1-BA11-BOUNDARY.xls P1 57 0207 BA 11 in support of CCRs.CSV Borrow Area 12 (HWL) P1 ESL-SECT 1 58 ESL1-Calc_Data.xls ESL-SECT1-BOUNDARY.xls P1 59 SSA2AP11.xls SSA2A P1-1.xls P1 FISHERMAN's Parking Lot 60 FISHERPOST.xls FISHERMAN-BOUNDARY.xls P1 P1-ALONG ELF FENCE 61 SECTION 25 P1-REMOVAL-ELF-FENCELINE.xls P1 ALONG ELF FENCE-BOUNDARY.xls P1 P1 in Section 36 East 62 Zone C3 report.xls SECT36-EAST-BOUNDARY.xls P1 63 Zone C4 report.xls 64 Zone E Report.xls P1 In Section 36 North 65 Zone C2 report.xls SECT36-NORTH-BOUNDARY.xls P1 66 Zone C6 report.xls P1 P1 in Section 36 West 67 Zone A1.xls SECT36-WEST-BOUNDARY.xls P1 Excavation documented in the CAMU soil removal CCR by MK 1998b (REF. TABLE 8.2-1)**Borrow Area / or Section** Survey File No. **Associated Pre/Post Excavation Files Design Boundary Files**  **Soil Type** 68 Zone C-1(North) report.xls P1 P1 in RCRA EQ. Test Plots P1 P1 in North Access Control Area P1 North Plants Structure Demolition (Chem Sewer Removal) P1 P1 within the CAMU boundary P1 1SE-4 69 1SE-4TRER-post-101204.xls 1SE-4-BOUNDARY.xls TRER 70 1SE-4TRER-post and backfill-111004.xls 6NW-3 71 TRER 24SW-1 72 Borrow-5 P2 and Topsoil Removal Verification.xls 24SW-1-DESIGN BOUNDARY.xls TRER 26SW-1 73 CADD BA-3_26SWpost Sub 094.xls 26SW-1-DESIGN BOUNDARY.xls TRER 26WC-2 74 CADD BA-3_26SWpost Sub 094.xls 26wc-2-design boundary.xls TRER 26SE-7 Excavation documented in Basin F Exterior Soil Remediation part 1 CCR TRER 31EC-1&2 75 BA-10_post 060704 Sub092.xls 31EC-1-2-BOUNDARY.xls TRER 35SE-1 76 TRER 36EC-1 77 BA-9B_36EC-1post Sub 095.xls 36EC-1-DESIGN BOUNDARY.xls TRER 36NE-3 TRER Excavation documented in P1 Section 35 Excavation documented in the CAMU soil removal CCR by MK 1998b (REF. TABLE 8.2-1)

Western area Excavation documented in Borrow area 7a Excavation documented in Borrow Area 11 Excavation documented in the CAMU soil removal CCR by MK 1998b (REF. TABLE 8.2-1) Excavation documented in the CAMU soil removal CCR by MK 1998b (REF. TABLE 8.2-1)

Excavation documented in the North Plants Structure Demolition CCR