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14th Quarter, Final Quarterly Progress Report

RCRA Facility Investigation

The RFI is being conducted to characterize the environmental setting of CSSA, define the sources of contamination, define the degree and extent of contamination, and identify actual or potential receptors, and to assess whether any additional IM may be warranted. The RFI is estimated to represent approximately 30 percent of the required actions at CSSA. The RFI includes a Preliminary Report (5 percent of RFI), RFI WP (10 percent), Facility Investigation (45 percent), Human Health and Ecological Risk Assessment (15 percent), Investigation Analysis (10 percent), Treatability Studies (10 percent), and Progress Reports (5 percent). As of the end of Quarter 14, the RFI is approximately 42 percent complete.

Task I: Preliminary Report: Description of Current Conditions

Task Description

This task includes preparation of the DCC Report. The DCC Report includes information from previous investigations and other relevant data. Information related to the facility background, nature and extent of contamination and pre-investigation evaluation of corrective measure technologies is included in the DCC Report. CSSA’s Environmental Encyclopedia was used to meet the DCC Report submittal requirements. The final DCC Report was submitted to the USEPA and TCEQ on August 1, 1999. No regulatory comments have been received on the report. This task makes up approximately 5 percent of the RFI phase, and is 100 percent complete.

Task II: RFI Work Plan

Task Description

The Order requires that the RFI WP include a Project Management Plan, Data Collection Quality Assurance Plan, Health and Safety Plan (HSP), and a Community Relations Plan (CRP). As previously agreed by USEPA, CSSA’s Environmental Encyclopedia will be used to fulfill this requirement. The Environmental Encyclopedia includes all the information required by the Order in a unique format. Completion of this task is funded for the planned RFI tasks.

Activities this Quarter

A Draft Waste Management Plan (WMP) was prepared for activities planned at SWMU B-3, AOC-65, and well installations funded under multiple delivery orders, including TO 0042 and TO 0058. This Draft WMP was submitted to USEPA and TCEQ for review. TCEQ provided USEPA with comments who forwarded them to CSSA. USEPA did not have additional comments and CSSA revised the WMP. The revised Draft WMP was submitted to USEPA on June 13, 2002 for review. The Final WMP was submitted to USEPA on August 21, 2002 and incorporated revisions that addressed USEPA and TCEQ comments. USEPA approval of the WMP was obtained by letter dated October 17, 2002.

Draft DQOs and plan addenda were prepared for investigation/remediation of AOC-55. The draft work plan addenda were completed in Quarter 14. Field investigations began on October 21, 2002, with an EM-31 survey. Slit trench investigation activities will begin after the EM Survey is completed.

Parsons completed telephone interviews of selected residents and public officials in Quarter 14 and submitted the Draft CRP Update to CSSA and AFCEE. Parsons obtained comments from AFCEE, CSSA, Fulton Communications, and USACE on the CRP update. The Final CRP Update will be submitted for incorporation into the Environmental Encyclopedia. Preparations for the public meetings conducted in October 2002 used the findings of the CRP Update Report. The public meetings are discussed in RFI Investigation, Summary of Contacts, below.

Due to additional soils and debris identified during the RFI, and an increase in the volume of material requiring excavation and disposal, a change order was submitted by Foster Wheeler Environmental Corporation (FWC) to modify Delivery Order (DO) 23 on October 16, 2002.

  1. Percent Complete

This work plan task makes up approximately 10 percent of the RFI phase. Estimation of percent complete is difficult due to the continuing need for plan addenda. As of the end of Quarter 14, work plans currently under scope are approximately 99 percent complete. The remaining work plans under this task are associated with plan and DQO revisions under TO 0042 (well installation and sampling), TO 0058 treatability study at AOC-65, and the addenda scoped under TO 0009 (AOC-55 removal action). The CSSA Environmental Encyclopedia will continually be updated as documents are completed.

  1. Summary of Findings

No new findings are associated with RFI WP preparation during this reporting period.

  1. Summary of Changes

No changes to the RFI WP were made during the reporting period.

  1. Summary of Contacts

The kickoff meeting for excavation activities planned at AOC-55 was held Tuesday October 8, 2002, and consisted of discussions regarding planned activities and Draft DQO discussions. The meeting was attended by Teri DuPriest (AFCEE), Greg Lyssy (EPA), Brian Murphy (CSSA), Brian Vanderglas, Ken Rice, Kyle Caskey, and Gary Cobb (all of Parsons).

  1. Summary of Problems

During floods in 2002, portions of AOC-55, a landfill area adjacent to Salado Creek, were uncovered due to erosion of cover soils.

  1. Actions Taken to Correct Problems

CSSA obtained funding to address problems at AOC-55, and contracted with Parsons during Quarter 14 to perform the remedial actions. Fill material was brought in to cover exposed landfill material. No additional actions were taken to correct the problems at AOC-55. DQOs were prepared for the AOC-55 removal action and were discussed at the kick-off meeting for AOC-55. Procurement documents (bid packages) were prepared for remediation contractors, and removal actions will be initiated.

  1. Projected Work for the Next Quarter

Procurement of a remediation contractor for AOC-55 will be completed and plan addenda will be finalized and added to the Environmental Encyclopedia in Quarter 15. Results from pre-excavation investigations will be evaluated.

  1. Copies of Daily Reports, Inspection Reports, Data, etc.

Preliminary groundwater data for the September 2002 sampling event (on-post and off-post) were received by Parsons in Quarter 14. The data packages for TO 0042 data package groups D, E, F, G, H, and I contained screening and/or discrete laboratory results for sampling conducted this quarter. These data packages were validated by Parsons chemists this quarter. Data Verification Reports will be submitted to AFCEE in Quarter 15.

Task III: Facility Investigation

Task Description

An investigation of the facility is being conducted to:

  1. Characterize the environmental setting of the facility;

  2. Define the source(s) of contamination;

  3. Define the nature and extent of contamination; and

  4. Identify actual or potential receptors.

In some cases, multiple phases of investigation may be necessary. The investigation results will be used to develop and evaluate alternatives during the Corrective Measures Study. All investigation activities are being conducted in accordance with the RFI WP. Any deviations are documented with WP addenda.

Completion of this task is partially funded for the planned RFI tasks. Investigation of all SWMUs, except B-71, is funded, and investigation of all AOCs, except AOCs 44-46, 49, 51-54, 59, 60, 62-64, 68-70, and 72-73 is funded. Funding for on-post and off-post groundwater monitoring is covered under TO 0042 through July 2003.

RFI work for the AOC-65 treatability study (TO0058) initiated during Quarter 13 were continued in Quarter 14. The work completed as of the end of Quarter 14 include the installation of the piezometers, vapor extraction wells (VEWs), vapor monitoring points (VMPs), and soil vapor extraction (SVE) piping and equipment. Removal action work initiated during Quarter 13at AOC-65 (TO0058) was completed in Quarter 14. The removal action activities include excavation and disposal of 1,000 tons (600 cubic yards) of impacted soil outside of Building 90, and the extension of the Building 90 roof gutters and drainage ditch to divert storm water run-off away from source areas west of the building. Most of the site restoration was also completed during Quarter 14, including concrete lining of the drainage ditch north and west of Building 90 and completing asphalt resurfacing.

Investigations were initiated at AOC-55 in October 2002 to determine the extent of landfills and characterize the contents. Surface geophysical testing was initiated on October 21, 2002 conducted to define the limits of the perimeter of AOC-55 and slit trench investigations and data collection were initiated on October 29, 2002.

Activities this Quarter

Groundwater Monitoring

Off-post groundwater sampling was performed during the week of September 16, 2002. Twentyprivate and public off-post wells were sampled in September 2002 including JW-14, LS-7, LS-6, RFR-10, OFR-3, RFR-11, LS-2, LS-3, LS-4, LS-1, HS-2, JW-9, JW-26, I10-4, FO-J1, OFR-1, LS-5, OFR-2, I10-2, RFR-12. Post GAC samples were collected from wells LS-7-A2, LS-6-A2, RFR-10-A2, OFR-3-A2, RFR-11-A2, LS-2/LS-3-A2, and after the first GAC canister treatment at LS-2 and LS-3. The locations of these wells are shown on Figure 2.1 in Attachment 2. Samples for VOCs were analyzed by APPL, and preliminary data were received by Parsons on October 16 and 17, 2002. Additional sampling was conducted for JW-14, LS-7, LS-6, RFR-10, OFR-3, RFR-11, LS-1, LS-2, LS-3, LS-4, HS-2, and JW-9 for natural attenuation parameters this event. Data validation for natural attenuation parameters and VOCs is currently ongoing for this groundwater event.

Quarterly groundwater monitoring of 28 on-post wells was performed the week of September 9, 2002. CSSA wells CS-MW16-LGR, CS-D, CS-MW1-LGR, CS-MW2-LGR, CS-1, CS-10, CS-9, CS-11, CS-2, CS-MW3-LGR, CS-MW4-LGR, CS-MW5-LGR, CS-MW6-BS, CS-MW6-LGR, CS-MW6-CC, CS-MW9-LGR, CS-MW9-CC, CS-MW9--BS, CS-MWG-LGR, CS-MW17-LGR, CS-MW18-LGR, CS-MW19-LGR, CS-MW8-LGR, CS-MW8-CC, CS-MW7-LGR, CS-MW7-CC, CS-MW10-CC and CS-MW10-LGR were sampled. Locations of the on-post wells sampled are shown on Figure 2.2 in Attachment 2. Samples were analyzed by APPL with preliminary data received by Parsons October 8, 2002. Analytical results remained unvalidated at the end of Quarter 14. In addition to the approved list of metals and VOCs, natural attenuation parameters were also analyzed during the September 2002 event. Interpretation of the natural attenuation parameters will be included in future groundwater monitoring reports.

The June 2002 Final On- and Off-Post Quarterly Groundwater Monitoring Reports were incorporated in the Environmental Encyclopedia in October 2002. The draft On-post and Off-post Quarterly Groundwater Monitoring Reports for September 2002 will be submitted in Quarter 15 for CSSA and AFCEE review.

Off-Post GAC Systems

Monthly O&M of the 5‑micron pre-and post-filters at the CSSA maintained residential GAC treatment systems was performed. This filter exchange maintenance is scheduled to be performed monthly on the wells with GAC filtration systems installed, specifically wells LS-6, LS-7, RFR-10, RFR-11, and OFR-3. Post-GAC confirmation sampling was conducted during the quarterly off-post sampling event in September 2002 and preliminary laboratory results received by Parsons confirm that GAC treatment systems are working effectively. These results are currently being validated by Parsons’ chemists as part of the September quarterly monitoring event. The next post–GAC confirmation sampling will be conducted in March 2003.

During the week of September 27, 2002, Parsons was asked by CSSA to evaluate complaints of pressure drops at well RFR-11. This location had been originally fitted with two GAC treatment units that independently served both the primary residence and mobile homes on the property.

The system was evaluated by a Parsons technician and a representative of GeoProjects. While the household pressure was adequate under static conditions, the discharge of water at the house faucets appeared constricted. The pressure drop was determined to be caused by the ¾-inch GAC plumbing that was tied to the 1-¼-inch water distribution system. As a remedy, the second GAC that was no longer needed by the mobile homes, since the residents moved out, was plumbed in parallel with the existing household GAC. This modification essentially doubles the amount of treated water available to the homestead, while leaving no property drinking water untreated. At the present time, the homeowner is satisfied with the wellhead modification.

Data Validation and Verification

Data packages related to quarterly groundwater monitoring activities consist of groundwater monitoring conducted on- and off-post during Quarter 14 (the September 2002 quarterly sampling event). Verification of data packages continued during Quarter 14. AFCEE chemists approved ten (10) groundwater data packages this quarter (from August 1 2002, through October 31, 2002). Through October 2002, approximately 53 groundwater data packages (of a total 252 data packages) were being reviewed by Parsons or submitted to AFCEE, and 46 data packages had been approved by AFCEE. The remaining 199 RFI data packages (of 252 total data packages) relate to site-specific sampling and are discussed below.

There are 199 data packages related to RFIs for site-specific soil and groundwater sampling conducted at various SWMUs and AOCs. Verification of additional RFI data packages continued during Quarter 14. Parsons is validating 13 additional RFI data packages received this Quarter. Through October 2002, approximately 199 RFI data packages (from a total 252 data packages) were submitted and 168 RFI data packages were approved by AFCEE. The remaining 53 data packages of the total 252 relate to quarterly groundwater sampling and are discussed above.

RCRA Facility Investigations of SWMUs and AOCs

Preparation of RFI/Closure Reports for CSSA SWMUs and AOCs continued during Quarter 14. During Quarter 14, draft reports for SWMU B-9 and AOC-42 were submitted, and final reports for SWMUs B-9, B-15/16, and B-32, and AOCs -35, -42, -43, -56, -58, and -61 were submitted. Parsons continued preparation of draft reports for SWMUs B-10 and I-1, and Building 43 (funded under RL53); AOC-50 (funded under DO 5068); and SWMU Building 40 (funded under RL74) during Quarter 14. In addition, responses to AFCEE and CSSA comments on draft reports were prepared. Sites that meet RRS1 closure requirements have been certified by a registered professional engineer. AFCEE and CSSA comments were incorporated and the revised background levels were compared to draft reports already submitted. A summary of the status of each site, including whether the site has been recommended for closure or if closure has been approved, is provided in Attachment 1. CSSA has submitted closure recommendations for SWMU B-1, B-9, B-11, B-22, B-26, B-27, B-29, B-30, B-31, B-32, B-33, B-34, AOC-35, AOC-43-, and AOC-61 during Quarter 14. TCEQ has approved closure of SWMU B-5, B-6, B-7, B-19, AOC-36, AOC-39, AOC-40, and AOC-47 during Quarter 14.

Well Installations

Parsons and the drilling subcontractor continued well installations and upgrades during this quarter. Through the end of the previous quarter, well upgrades at CS-MW1-LGR, CS-MW2-LGR, CS-MW16-LGR, and CS-G had been finished and new well CS-MW18-LGR was almost complete. The field crew mobilized to a new drilling location, CS-MW19-LGR. The site was cored to the Bexar Shale contact with a total depth of 365 feet below ground surface (bgs). A geophysical survey was conducted and three discrete interval samples were collected for short-list VOC analysis on August 6, 2002. Toluene was detected in all three samples at concentrations of 3.80 μg/L (312-324 feet bgs), 32.6 μg/L (333-345 feet bgs), and 7.95 μg/L (353-365 feet bgs). The Lower Glen Rose monitoring well was installed on August 9, 2002, to a total depth of approximately 368 feet and a screened interval from 343 feet to 368 feet bgs. IDW generated during the well installation was sampled August 13-16, 2002, and eventually discharged to the ground surface upon receipt of laboratory results which indicated no contamination.

Upon completion of CS-MW19-LGR, Parsons and the drilling subcontractor mobilized to the drilling location for CS-MW17-LGR. The site was cored to the Bexar Shale contact occurring at 388 feet bgs with a total depth of the borehole of 401 feet bgs. A geophysical survey was conducted August 15, 2002. The borehole was reamed beginning the week of August 19, 2002, and the monitoring well was installed on August 30, 2002. IDW generated during the well installation was sampled August 23, 2002, and eventually discharged to the ground surface upon receipt of laboratory results which indicated no contamination.

Following completion of CS-MW17-LGR, the field crew mobilized to perform the well upgrade on CS-H. CS-H could not be rehabilitated so it was plugged and abandoned. A new well, CS-MWH-LGR was drilled/cored to a depth of 382 feet bgs. Both geophysical and video surveys were completed on September 9, 2002, and the well was completed to 365 feet bgs.

Drilling commenced during Quarter 14 at the CS-MW12 well cluster. Work began with coring at CS-MW12-LGR, where the Bexar Shale was encountered at 375 feet bgs. The corehole was geophysically logged, and four discrete interval groundwater samples were collected. Results of the screening data indicated that the Lower Glen Rose was free of contamination at that location. The well was permanently installed to a depth of 370 feet bgs. Following that installation, work commenced at CS‑MW12-CC. The boring was cored to a final depth of 502 feet bgs. The Bexar Shale and Cow Creek portions of the Middle Trinity aquifer were geophysically logged, and four discrete interval groundwater samples were collected. Results of the screening data indicated that the Cow Creek limestone was also free of contamination at that location. The well was permanently installed to a depth of 465 feet bgs. The results of all IDW samples indicated no contamination in either the groundwater or sediment fraction of the drilling fluid. Therefore all generated water was eventually discharged to the ground surface. At the end of Quarter 14, drilling was initiated on CS-MW1-CC well location.

Parsons operated the CSSA Outfall 002 groundwater treatment plant during the reporting period. Groundwater produced during the CS-MW1-LGR, CS-MW2-LGR, CS-MW18-LGR, and CS-MW19-LGR well development was contained and treated through the granular activated carbon (GAC) unit. Post-GAC samples were collected on August 9, 2002; August 29, 2002; September 5, 2002; and September 9, 2002, in compliance with TCEQ TPES requirements. Results were incorporated into the TCEQ discharge monitoring report (DMR) prepared by Parsons on behalf of CSSA. In addition to the normal clean-up verification samples, two rounds of waste characterization compliance samples were collected and submitted for analyses (TCEQ – Attachments A, B, C, and D). Results were forwarded to TCEQ in October 2002.

There are twenty-seven drinking water, livestock, and monitoring wells installed at CSSA, including monitoring wells completed during previous investigations. TO 0042 funds the installation of 17 new monitoring wells, 10 wells to be completed in the Lower Glen Rose, two in the Bexar Shale, and five in Cow Creek. In addition, five well upgrades to existing wells were completed under TO 0042 (CS-16, CS-G, CS-H, CS‑MW1-LGR, and CS-MW2-LGR). At the end of Quarter 14, the well upgrades and the installation of four new monitoring wells under TO 0042 have been completed. New well installations are expected to continue throughout Quarter 15.

Building 90/AOC-65 Investigation

Field activities for TO 0058 continued in Quarter 14. The drilling activities in and around Building 90 initiated in Quarter 12 were completed in August 2002. The drilling program focused on characterizing geologic conditions of the upper 150 feet of bedrock and included the installation of six piezometers, seven VEWs, seven VMPs outside Building 90, and 12 VEWs inside the building. The drilling activities also included performing 12 soil borings to characterize the extent of impacted soils west of the building and two 150-foot deep angle coreholes to gain further knowledge of geologic conditions west of the building. In addition, eight borehole geophysical surveys (natural gamma and caliper), 11 borehole video surveys, and two soil-gas packer extraction tests were performed during the drilling activities.

One soil gas packer test was performed during Quarter 13 and a second was performed during this Quarter as part of TO 0058. The second packer test was performed on August 20, 2002 in the borehole for VEW-18. Nine discrete intervals were isolated in the 79-foot deep borehole and soil gas samples extracted. Six of the eight soil gas samples were submitted for laboratory analysis. Laboratory results for the samples were received on October 11, 2002, and will be incorporated into the Interim Treatability Test Report to be submitted.

Draft standard air exemption packages for the SVE and subslab blower systems were prepared during Quarter 13. The estimate for the air emission levels from the SVE system was calculated from the laboratory results of soil samples collected at AOC-65. The final exemption package was submitted to the TCEQ in Quarter 14 after responding to comments obtained from CSSA.

Installation of the SVE system outside Building 90 was completed in Quarter 14 under TO 0058. The installation of the SVE piping outside the building was completed during the Quarter. The piping for the SVE system inside Building 90 was installed in Quarter 12. Installation of the SVE blower system (blowers, moister separator, vapor phase carbon treatment unit, and electrical controls) was also completed during Quarter 14. Startup and testing of both SVE systems is anticipated to begin next quarter.

A groundwater recharge study in the AOC-65 area was initiated during the Quarter as part of the TO 0058 task order. A weather station was installed west of the building to measure rainfall and other meteorological parameters. Pressure transducers placed in the six piezometers and connected to the data logger at the weather station, will record changes in groundwater levels. The purpose of the recharge study is to evaluate the infiltration and movement of water through the upper portions of the bedrock material. Data collection for the recharge study is expected to begin early next Quarter.

The removal actions initiated in Quarter 13 as part of the TO 0058 task order was completed in Quarter 14. Approximately 1,000 tons (600 cubic yards) of impacted soil was excavated from along a drain line and drainage ditch west of Building 90. Soil samples were collected for verification analysis from the excavation to document concentrations remaining in the soils. The portion of the excavation in the parking lot was backfilled with gravel and the re-surfaced with asphalt. The drainage ditch north and west of the building was rebuilt with a concrete liner to prevent water from infiltrating in the suspected source area. Also, the roof gutters along the west side of the building were reconfigured to divert the water away from the building and the source area.

SWMU B-3 Excavation

Due to unseasonably heavy rainfall in July, the start of the Interim Removal Action (IRA) at SWMU B-3 was delayed. Site conditions were sufficiently dry to allow mobilization on August 26, 2002.

Removal of approximately 650 loose cubic yards (LCY) of PIMS treated soil from SWMU B-10 and relocation to SWMU B-20, (the original source) was initiated August 27, 2002 and completed August 30, 2002. The area formerly occupied by the PIMS field demonstration project was used to stage and stockpile the waste from SWMU B-3.

The removal and stockpiling of cover soil at SWMU B-3 began on August 28, 2002. Based on sampling and analytical results, this soil will be reused as fill at the site. Within the west trench, larger volumes of potential waste material were encountered during the investigation. Samples were collected to characterize the soil media in the SWMU B-3 west trench on September 12, 2002. Results received on September 20, 2002, indicated some portions of the media within the west trench contained lead (D008) and TCE (D039) above RCRA hazardous waste criteria.

The SWMU B-3 east trench investigation and excavation was initiated September 16, 2002. Waste material including four drums of unknown origin and content were removed and placed in the lined waste accumulation area. The excavated waste from the east trench were characterized according to the established DQOs. Waste characterization results of the excavated east trench material, received October 10, 2002, indicated that the material exceeded RCRA hazardous waste criteria levels for TCE (D039) and PCE (D040). In addition, analytical results of several sidewall samples from the east trench were above established background criteria (non-detect for organic compounds). Over excavation of the affected portions of the east trench were performed. Partial backfilling of the east trench was initiated on September 25, 2002 in those portions of the excavation where data indicated no contaminants above background.

Through October 31, 2002, a total of 672 LCY (1,755,434 pounds) of DO39/DO40 hazardous media from the east trench has been transported to the Onyx Environmental Services, (Onyx) Port Arthur, TX facility for treatment and disposal (EPA ID# TXD000838896 and TCEQ ID# 50212) and approximately 918 LCY of Class 2 non-hazardous material has been transported to the Waste Management Covel Gardens (TCEQ ID#2093) facility for disposal. In addition, over 5,500 LCY of cover soil have been properly characterized and stockpiled for use as backfill.

The unanticipated size of SWMU B-3 has dramatically increased the estimated in-place volume of waste and has correspondingly increased the analytical costs and data management. A total of 22 confirmation samples were collected from the east trench at SWMU B-3. The established waste characterization data quality objectives (DQOs) for SWMU B-3 were followed in determining the proper characterization of contaminated and cover soils. A total of 22 waste characterization samples were collected and 10 backfill samples were collected and analyzed for contaminants of concern (COCs). Five additional samples of the cover material were analyzed for total zinc and mercury to determine if it is appropriate for use as backfill. Additionally, six of the waste characterization samples were reanalyzed for COCs to confirm that the soil could be used as backfill. Sample totals do not include QA/QC samples.

Miscellaneous

Parsons and CSSA prepared cumulative analytical results tables in support of an updated list of contaminants of concern (COCs) for future groundwater sampling events. The comparison of historical results to trip blank results justifies reducing the list of analytes and preparing two separate analyte lists for both on- and off-post. The request for approval of a revised short list of COCs was submitted to the TCEQ and the USEPA on August 26, 2002. No response to the proposed short list of COCs was received during Quarter 14. The revised short list was incorporated into the sampling event for on-post groundwater and off-post groundwater conducted in September 2002.

Karst survey work initiated during Quarter 12 continued through Quarter 14. The Phase 1 survey covering the entire 4,000 acres at CSSA was completed. The survey team identified 96 potential karst features, 94 on CSSA property, and two on private property. A draft report was prepared and provided to CSSA for review in Quarter 14.

Preparation of the hydrogeologic conceptual site model (CSM) funded under RL83, WBS 04, continued during Quarter 14. Preparation of well installation reports for cluster wells installed under RL83 also continued in Quarter 14.

A new project to handle administrative aspects of CSSA’s environmental program, such as preparation of Quarterly Progress Reports (15-19), preparation of Environmental Encyclopedia updates, and updates to the hyperlinked Environmental Encyclopedia, was initiated during Quarter 14. These activities are funded under newly created TO 0079.

CSSA completed Fact Sheets 8 and 9during Quarter 14 and distributed them on September 18, 2002. Fact Sheets 8 and 9 were mailed to members of the distribution/mailing list maintained by CSSA. Parsons completed preparation of Fact Sheet 10 during Quarter 14. The Fact Sheet was available to the public as a handout at the Public Meetings. The Fact Sheet will be mailed to the updated mailing list in Quarter 15.

  1. Percent Complete

This task makes up approximately 45 percent of the RFI phase. As of the end of Quarter 14, this task is approximately 35 percent complete.

  1. Summary of Findings

Quarterly groundwater monitoring for both on- and off-post wells was performed at CSSA from September 9-20, 2002. A revised map of the well locations is provided in Figure 2.1 and Figure 2.2 of Attachment 2 of this report. These figures include monitoring well installations completed through the end of Quarter 14.

On-post Wells, September 2002: Three on-post drinking water and 22 monitoring wells were sampled June 17-21, 2002. Samples were collected at wells CS-MW16-LGR, CS-D, CS-MW1-LGR, MW2-LGR, CS-1, CS-10, CS-9, CS-11, CS-2, CS-MW8-LGR, CS-MW3-LGR, CS-MW4-LGR, CS-MW5-LGR, CS-MW9-LGR, CS-MW9--CC, CS-MW9--BS, CS-MWG-LGR, CS-MW17-LGR, CS-MW18-LGR, CS-MW19-LGR, CS-MW6-BS, CS-MW6-LGR, CS-MW6-CC, CS-MW8-LGR, CS-MW8-CC, CS-MW7-LGR, CS-MW7-CC, CS-MW10-CC and CS-MW10-LGR . Samples were analyzed by APPL. Results of the September 2002 groundwater monitoring event will be formally reported in a draft September 2002 Quarterly Groundwater Monitoring Report that will be submitted to CSSA and AFCEE during Quarter 15 for review and comments. Locations of the on-post wells sampled are provided on Figure 2.2 in Attachment 2.

Off-post Wells, September 2002: Twenty off-post groundwater wells were sampled September 16-20, 2002. Samples were collected at wells JW-14, LS-7, LS-6, RFR-10, OFR-3, RFR-11, LS-2, LS-3, LS-4, LS-1, HS-2, JW-9, JW-26, I10-4, FO-J1, OFR-1, LS-5, OFR-2, I10-2, and RFR-12. All samples were analyzed by APPL. Results of the off-post groundwater monitoring will be formally reported in a draft September 2002 Quarterly Groundwater Monitoring Report to be submitted to CSSA and AFCEE during Quarter 15. Locations of the off-post wells sampled are provided on Figure 2.1 in Attachment 2.

AOC-65: Results of the investigation activities have provided a preliminary understanding of groundwater flow in the Building 90 area. The investigation activities identified a highly weathered, karstic zone in bedrock at a depth of approximately 28 to 31 feet. This highly weathered zone is believed to be the lower portion of the Upper Glen Rose Limestone, and the corbula bed which separates the Upper and Lower Glen Rose Limestone underlies this zone. Below the weathered zone, the rock material becomes more competent and less permeable. A second permeable zone was identified in the Lower Glen Rose Limestone at a depth of approximately 105 to 135 feet below land surface. During periods of recharge following rainfall, groundwater appears to flow laterally through this shallow weathered zone with the largest component of vertical flow through the underlying competent rock likely occurring along fractures and faults and into the lower permeable material.

The investigation also identified the location of two faults trending northeast to southwest through the area. One fault is located north of Building 90 and has approximately ten feet of offset across the fault. A second fault zone was identified south of the building and is composed of at least two small faults. The southern fault zone is believed to have a significant influence on groundwater flow and contaminant migration from the AOC-65 area.

Laboratory results for the soil gas packer test conducted at VEW-18 identified the presence of PCE in all samples and TCE in one sample. The sample collected from the 28 – 34 foot depth interval contained the highest concentration of PCE and also contained the only detection of TCE. The concentrations detected in this packer test are considerably lower than the concentration detected in the test performed on VMP-04 in Quarter 13. Oxygen and CO2 levels detected in the 18 - 24 foot interval suggest that significant biological activity may be occurring in that zone. However, it may be important to note that cis-1,2-dichloroethene, a common degradation compound of PCE and TCE, was not detected in the samples.

  1. Summary of Changes

No changes to the RFI were made during the reporting period.

  1. Summary of Contacts

On August 27 – 28, 2002 Technical Interchange Meeting (TIM) #4 for TO 0058 was held. The primary purpose of the TIM #4 meeting was to present the findings of the groundwater investigations and other environmental activities conducted at CSSA to the environmental staff and consultants working on similar problems at neighboring Camp Bullis. Related issues between CSSA and Camp Bullis were discussed on the first day of the TIM #4 meeting, whereas on day 2 the items discussed included project DQOs, Fact Sheet 10, and static display plans for the Public Meeting scheduled in October.

On September 23 and 24, 2002, a risk communication training session was held for the public meeting participants in the Camp Stanley open houses/public meetings. Risk Communications Training was funded by CSSA in support of the public meetings scoped under TO 0058. The training session was attended by personnel from AFCEE, San Antonio Met Health District, Bexar Met Water District, CSSA, Foster Wheeler, Fort Sam Houston, and Parsons at the CSSA Environmental Office. The training was presented by Fulton Communications.

A meeting was held on October 2, 2002 between CSSA representatives and US AEC to discuss the results of the geophysical surveys completed at CSSA under the TO 0058 task order activities.

On October 8 and 9, 2002 CSSA conducted public meetings to present information regarding the status of the environmental program to the members of the local community. On the evening of October 8, a meeting was held at Leon Springs Elementary School, and on the evening of October 9, a meeting was held at Fair Oaks Ranch Elementary School. Public attendance for both meetings was minimal. The low public turnout for the meetings may suggest that the community concerns are being effectively addressed by the proactive approach CSSA has taken to address off-post environmental concerns and CSSA’s informative community relation program.

  1. Summary of Problems

AFCEE approved 10 data packages during Quarter 14. Cumulatively, 178 data packages have been approved through the end of Quarter 14. Approximately forty-three data packages are awaiting submittal or re-submittal by Parsons’ chemists, comments and/or approval from AFCEE.

  1. Actions Taken to Correct Problems

No actions beyond those previously reported for the data package review and approval process have been taken to correct problems.

  1. Projected Work for the Next Quarter

Fact Sheet 11, summarizing the findings of the September 2002 Quarterly Groundwater Monitoring will be developed and mailed to area residents. Fact Sheet 10, prepared in Quarter 14 and distributed during the Public Meetings, will be mailed to the current mailing list. In addition, a response postcard will be provided to current mailing list recipients to allow them to be removed from the mailing list.

The next quarterly groundwater monitoring event will be conducted in December 2002. This upcoming event will include the existing CSSA wells that are sampled, approximately 25 off-post wells (VOCs only), and any newly completed and developed on-post monitoring wells. On- and off-post quarterly sampling will be funded under TO 0042 in December 2002.

O&M at the residential GAC filtration systems (LS-6, LS-7, OFR-3, RFR-10, and RFR-11) and on private water supply systems (LS-2/LS-3) will be conducted in Quarter 15.

Additional data collection at AOC-65 will be conducted in Quarter 15. Installation of the AOC-65 SVE systems and weather station was continued during Quarter 14. Startup and testing of the SVE systems is also anticipated to begin in Quarter 15. Data collection for the groundwater recharge study will also begin in Quarter 15.

Work will continue in Quarter 15 on the six remaining draft RFI reports to be submitted as well as the 22 remaining RFI reports to be submitted as final. RFI/Closure reports ready to be made final will be submitted to the TCEQ as soon as comparison to the revised background numbers is performed.

Work will continue with the on-post well installation. A Bexar Shale well will be installed next to CS-MW1-LGR, and Cow Creek wells will be installed next to CS-MW1-LGR, CS-MW2-LGR, and CS-MW16-LGR.

SWMU B-3

The unanticipated site conditions encountered have delayed the IRA progress and dramatically increased the estimated in-place volume of soil from 8,000 bank cubic yards (BCY) to 26,000 BCY. The IRA has been divided into two remediation phases. To facilitate appropriate funding, Phase 1, completed at the end of October, expends the original budget to dispose of the hazardous and non-hazardous waste excavated and stockpiled from the SWMU B‑3 east trench. Phase 2, once funded, will continue efforts for the remaining hazardous and non-hazardous material within the west trench, which will complete the SWMU B-3 IRA. Funding efforts were initiated in Quarter 14 and should be completed in the next quarter.

AOC-55 Excavation

Investigation activities will be conducted at AOC-55 during the next Quarter. The removal action will be initiated during Quarter 15, upon completeion of the investigiation activities. The investigation activities consist of waste area lateral extent delineations utilizing appropriate UXO avoidance methods; UXO identification and removal actions, and waste characterization for all waste impacted media. The removal actions will consist of properly profiling the waste media encountered and excavation and transportation of waste material.

SWMU and AOC RFI/Closure Reports

Continued preparation and submittal of draft and final RFI and Closure reports will be conducted in Quarter 15. Reports to be submitted include the draft reports for SWMU B-10, AOC 50, and I-1 and the final report for Building 43.

  1. Copies of Daily Reports, Inspection Reports, Data, etc.

Reports summarizing the most recent groundwater findings are submitted to present the results from quarterly groundwater sampling events (on- and off-post). The quarterly groundwater monitoring reports present the groundwater elevations recorded (on-post wells only) and the analytical results received for each well (on- and off-post). The groundwater elevations are presented in the On-post Quarterly Groundwater Monitoring Reports on a potentiometric surface map and in tabular format. Analytical results from the most recent sampling events are compared to levels from the previous quarters, while comprehensive historical analytical results can be found in tables which are revised quarterly, presented in the Introduction to the Quarterly Groundwater Monitoring Program, Volume 5, Groundwater. Reports for each previously conducted quarterly monitoring event are located in Volume 5, Groundwater, behind the On-post Groundwater Monitoring and Off-post Groundwater Monitoring tabs.

Preliminary groundwater data from the September 2002 quarterly sampling event were received in October 2002, and data review and validation was initiated for both on- and off-post groundwater monitoring. Parsons will submit the draft September 2002 Groundwater Monitoring Reports for on- and off-post wells in Quarter 15, and will revise the reports based on comments/responses received from CSSA and AFCEE.

Task IV: Human Health and Ecological Risk Assessment

Task Description

This task includes a screening risk assessment, or if necessary, a baseline risk assessment for the potential human health and environmental risks posed by the site in absence of any remedial action. For human health risks, this effort will involve the following components:

  1. Contaminant Identification;

  2. Exposure Assessment;

  3. Toxicity Assessment; and

  4. Risk Characterization.

For ecological risks, the effort will include the following components:

  1. Problem Formulation;

  2. Exposure Assessment;

  3. Ecological Effects Assessment; and

  4. Risk characterization.

Completion of this task is partially funded. Currently planned and funded (under RL83) is preparation of a preliminary basewide human health and ecological CSM for risk assessment. The CSM identifies potential human and ecological receptors and land use surrounding the facility. In addition, a Risk Assessment Technical Approach has been prepared.

This task makes up approximately 15 percent of the RFI phase. The amount of effort needed to accomplish this task is not yet known because analytical data have not yet been fully evaluated. The percent complete depends on the number of sites requiring risk assessment.

Task V: Investigation Analysis

Task Description

This task includes preparation of an Investigation Analysis to support the selection of protection standards for CSSA. For sites closing under the State of Texas Risk Reduction Standards (RRS), this analysis will be included as part of the RFI Report. For sites closing to a risk-based standard, the analysis will be submitted along with the Risk Assessment Report. Background levels will be used to determine the possibility of closure under RRS1. The Investigation Analysis will also include groundwater protection standards and other relevant protection standards. The relevant protection standards will be used at sites where an RRS1 closure is not applicable. Due to the promulgation (September 23, 1999) of the Texas Risk Reduction Program (TRRP) (30 Texas Administrative Code [TAC] §350) by the TCEQ, two options are being considered for the protection standards. One option is to base the protection standards on the RRS2 Media-Specific Concentrations. The other option is to use the Protective Concentration Limits developed under TRRP. Site by site decisions will be made as additional information becomes available.

Activities this Quarter

During this quarter, data table preparation was continued to compare investigation results to closure criteria. Preparation of investigation/closure reports for each SWMU investigated in 2001 was continued as described previously in RFI Task III.

  1. Percent Complete

This task makes up approximately 10 percent of the RFI phase, and is approximately 33 percent complete.

  1. Summary of Findings

As described in Task III, 44 draft RFI reports have been completed and submitted, and 37 final reports have been completed and submitted. As part of the preparation of these reports, investigation results were compared to closure criteria. A summary of recommendations is provided in Attachment 1. Based on the final reports submitted through Quarter 14, 19 were recommended for closure and the remaining sites may require future action. Through October 31, 2002, a total of ten SWMUs or AOCs have been approved by TCEQ for closure.

  1. Summary of Changes

No changes associated with the Investigative Analysis were made during this reporting period.

  1. Summary of Contacts

No contacts related to the Investigative Analysis were made during this reporting period.

  1. Summary of Problems

No problems related to the Investigative Analysis occurred during this reporting period.

  1. Actions Taken to Correct Problems

No actions to correct problems were necessary during this reporting period.

  1. Projected Work for the Next Quarter

Continued work on comparison of investigation results to closure criteria will be performed.

  1. Copies of Daily Reports, Inspection Reports, Data, etc.

No daily reports, inspection reports, or data related to investigation analysis/risk assessment were generated during this reporting period.

Task VI: Treatability Studies

Task Description

This task may include a Treatability Study Program if so directed by the USEPA. Treatability studies are performed to determine the applicability of corrective measure technologies to conditions or problems at or resulting from waste management activities at CSSA. Where it is determined by USEPA that treatability testing is necessary, candidate technologies will be identified, a treatability study WP will be prepared, the treatability study(ies) will be implemented, and a treatability study report will be prepared. Completion of this task is partially funded. Funded activities include bench-scale treatability studies for SWMU B-20 and SVE and other treatability studies for treatment of soils at AOC-65 if further contamination exists. Data collection activities were discontinued on the SWMU B-3 SVE treatability study.

Activities this Quarter

As part of the Task II Interim/Stabilization Measures, a treatability study for stabilization of the excavated soils was continued during Quarter 14. O&M activities on the PIMS study site included leachate monitoring efforts and maintenance activities. Monitoring of the field treatment efforts are expected to continue quarterly for a minimum of one calendar year. Monitoring data are anticipated to support closure/remediation efforts for evaluation of the PIMS treatment method for sites with similar contaminants of concern. During Quarter 14, samples of non-treated soils were collected at SWMU B-20 to perform in vivo bioaccessability and other bioavailability tests. These samples were sent to UFA Ventures Laboratory in Richland, Washington for treatment and forwarded to Dr. Mick Major, who will perform the in vivo assessment through separate funding efforts from ESTCP. Results of the assessment are expected to be included in the final field demonstration report.

Additionally, during this reporting period, the SWMU B-10 field test site was removed and the soils placed near their original location at SWMU B-20. The area within the SWMU B-10 boundaries were made ready for the stockpile/staging of soils from the removal activities associated with SWMU B-3.

  1. Percent Complete

This task makes up approximately 10 percent of the RFI phase. The amount of effort needed to accomplish this task is not yet known because all pertinent data (e.g., analytical, physical, etc.) are not yet available. The percent complete depends on the number of sites requiring treatability studies and/or the need for a Treatability Study Program, but is currently estimated to be 93 percent complete.

  1. Summary of Findings

Analytical data continue to be received from the PIMS treatability study monitoring efforts. The results will be reported in the treatability study report anticipated to be completed in September 2003. The SVE system at SWMU B-3 was destroyed during the on-going removal actions.

  1. Summary of Changes

No changes associated with the treatability studies occurred during this reporting period.

  1. Summary of Contacts

Revisions to the scope of work proposed by University of Texas at San Antonio (UTSA) for characterization of contaminant migration near AOC-65 were presented to CSSA and Parsons TO 0058 project manager on August 23, 2002. CSSA is considering some of the studies proposed by UTSA.

  1. Summary of Problems

No problems related to the PIMS treatability studies occurred during this reporting period. There have been delays in the startup of the SVE and groundwater recharge studies planned under TO 0058 because of construction difficulties and weather.

  1. Actions Taken to Correct Problems

No actions to correct problems were necessary during this reporting period.

  1. Projected Work for the Next Quarter

No additional O&M testing will occur at the SWMU B-3 SVE system since it was removed during this quarter as part of the site removal action. The O&M assessment report will be finalize next quarter, and will be used to assist the technical staff working on the SVE treatability system at AOC-65. The final SVE system assessment report is tentatively scheduled for submittal during Quarter 15.

Monitoring and bioassessments of SWMU B-10 PIMS-treated soils for the PIMS treatability study is expected to continue during Quarter 15. Additionally, field scale treatability studies of soil density separation followed by phytoextraction of the previously sifted soil piles will continue in Quarter 15 as part of the treatability activities.

  1. Copies of Daily Reports, Inspection Reports, Data, etc.

No analytical data are submitted during this reporting period.

Task VII: Progress Reports

This task includes quarterly progress reports pertaining to the status of the RFI phase of work. This progress report is submitted as part of this task.

Completion of the Quarterly Progress Report preparation task is partially funded. Progress reports for two years (August 1999 – May 2001) were funded under RL83 of the Air Mobility Command (AMC) contract. Another six progress reports (July 2001 – October 2002) were funded under DO5084 of the AETC contract. Beginning in January 2003, completion of the quarterly progress reports will be funded under TO 0079.

  1. Percent Complete

This task makes up approximately 5 percent of the RFI phase. The percent complete is unknown because the number of quarterly progress reports needed is currently unknown; however, it is estimated to be approximately 15 percent complete.

  1. Summary of Findings

No findings associated with the progress reports were made during this reporting period.

  1. Summary of Changes

No changes associated with the progress reports occurred during this reporting period.

  1. Summary of Contacts

No contacts relating to progress reports were made during this reporting period.

  1. Summary of Problems

No problems relating to progress reports occurred during this reporting period.

  1. Actions Taken to Correct Problems

No actions to correct problems were necessary during this reporting period.

  1. Projected Work for the Next Quarter

The Progress Report for Quarter 14 will be submitted.

  1. Copies of Daily Reports, Inspection Reports, Data, etc.

No daily reports, inspection reports, or data related to the Progress Reports were generated during this reporting period.

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