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 15, the RFI is approximately 41 percent complete.

Task I - Preliminary Report: Description of Current Conditions

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. 

Since the DCC Report was submitted in August 1999, six additional sites have been identified by CSSA; these include AOC 69, AOC-70, AOC-72 and AOC-73 and SWMU B-71 and SWMU Building 40. AOC-69 is a former ammunition burn and munitions disposal area. AOC-70 consists of a 15 square foot concrete building formerly used as a pesticide storage area and a latrine. AOC -72 is a construction debris landfill and AOC -73 is a former landfill. The Building 40 less than 90 days container storage area was used for the collection of hazardous wastes from operations at the installation prior to transfer to the Defense Marketing and Reuse Office (DRMO) or contractor for appropriate disposal. SWMU B-71 is a small arms brass casing disposal area that was discovered during the placement of fiber optic cable. These sites have been added to CSSA’s Environmental Encyclopedia although further investigation is not funded at this time. 

Task II - RFI Work Plan

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. 

Final DQOs and plan addenda were submitted in January 2003 for investigation/remediation of AOC-55. 

The Final Community Relations Plan Update (CRP Update) was submitted for incorporation into the Environmental Encyclopedia during Quarter 15. This CRP Update summarized community relations activities initiated under the initial Community Relations Plan prepared in August 1999. The Public Involvement Plan introduced in August 1999 was implemented and a revised schedule for future public involvement was presented in the CRP Update.

1. Percent Complete

The RFI 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 15, 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), the addenda scoped under TO 0009 (AOC-55 removal action), and TO 0079 (environmental program support). The CSSA Environmental Encyclopedia will be updated continually as documents are completed. 

2. Summary of Findings

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

3. Summary of Changes

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

4. Summary of Contacts

No contacts occurred during this reporting period. 

5. Summary of Problems

No significant problems occurred during this reporting period. 

6. Actions Taken to Correct Problems

No actions were taken for any problems during this reporting period. 

7. Projected Work for the Next Quarter

No projected work under the RFI Work Plans task expected next period. 

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

No daily reports, inspection reports, or data related to the RFI Work Plan task were generated during this reporting period. 

Task III - Facility Investigation

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- and off-post groundwater monitoring is covered under TO 0042 through March 2003. 

The majority of current environmental activities on-going at CSSA are part of the RCRA Facility Investigation. Work on each of these tasks is described in the following paragraphs. The main areas of work this quarter include groundwater monitoring, maintenance of the off-post granular activated carbon (GAC) well head treatment systems, analytical data verification and validation, RCRA facility investigations of SWMUs and AOCs, well installations, Building 90/AOC-65 investigation and SWMU B-3 investigation.

Sampling of all on-post and selected off-post wells are conducted quarterly. Off-post groundwater sampling was performed during the week of December 2, 2002. Twenty-six private and public off-post wells were sampled, including FO-22, FO-J1, HS-2, I10-2, I10-4, I10-5, JW-12, JW-13, JW-14, JW-26, JW-9, JW-9A2, LS-1, LS-2, LS-3, LS-4, LS-5, LS-6, LS-7, OFR-1, OFR-2, OFR-3, RFR-10, RFR-11, RFR-12, RFR-3, and RFR-6. With the exception of JW-9A2, which was sampled after water had passed through the filtration system installed by the owner, all samples were collected from ports located near the well head. The locations of these wells are shown on Figure 3.1 in Attachment 3. Samples were analyzed for volatile organic compounds (VOCs) by APPL. Preliminary data on these samples were received by Parsons on December 27, 2002. Data validation and verification for these samples is ongoing for this groundwater event. 

Post GAC samples were not collected as part of the December 2002 sampling event. The next scheduled post-GAC samples for off-post GAC treatment systems will be collected during the March 2003 sampling event. 

Quarterly groundwater monitoring of 31 on-post wells was performed the week of December 10, 2002. CSSA wells CS-1, CS-2, CS-9, CS-10, CS-11, CS-D, CS-MWG-LGR, CS-MW1-LGR, CS-MW2-LGR, CS-MW3-LGR, CS-MW4-LGR, CS-MW5-LGR, CS-MW6-BS, CS-MW6-CC, CS-MW6-LGR, CS-MW7-CC, CS-MW7-LGR, CS-MW8-CC, CS-MW8-LGR, CS-MW9-BS, CS-MW9-CC, CS-MW9-LGR, CS-MW10-CC, CS-MW10-LGR, CS-MW12-BS, CS-MW12-CC, CS-MW12-LGR, CS-MW16-LGR, CS-MW17-LGR, CS-MW18-LGR, and CS-MW19-LGR were sampled. Locations of the on-post wells sampled are shown on Figure 3.2 in Attachment 3. Samples were analyzed by Severn Trent Laboratories (STL) with preliminary data received by Parsons on January 3 through 6, 2003. Data validation for VOCs, metals, and cations and anions is currently ongoing for this groundwater event. 

The September 2002 Final On-Post Quarterly Groundwater Monitoring Report and the September 2002 Off-Post Quarterly Groundwater Monitoring Report were incorporated in the Environmental Encyclopedia in January 2003. The draft On- and Off-post Quarterly Groundwater Monitoring Reports for December 2002 will be submitted in Quarter 15 or Quarter 16 to CSSA and AFCEE for review. 

Based on previous sampling results that indicated VOC levels, above or approaching the MCL, GAC filtration systems have been installed at seven off-post wells. In accordance with the CSSA Off-post Monitoring Program Response Plan, June 2002 (the Plan), off-post GAC wellhead treatment systems were installed and are maintained by CSSA. Monthly O&M of the 5 micron filters at the off-post residential GAC treatment systems was performed this quarter. 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. Carbon exchange for the GAC filtration system at wells LS-2 and LS-3 is to be performed every 180 days. The next maintenance to be conducted by Carbonair is scheduled during Quarter 16. Post-GAC confirmation sampling was conducted during the September 2002 quarterly off-post sampling event. Results from this event confirmed that GAC treatment systems were working effectively. The next post–GAC confirmation sampling will be conducted in March 2003, in Quarter 16. 

Laboratory results are validated and verified by Parsons’ chemists to ensure results are in compliance with AFCEE QAPP requirements. Data validation and verification continued during Quarter 15 under three CSSA projects, TO 0042, TO 0058, and ENRAC (TO 0009).

Data packages related to quarterly groundwater monitoring activities consist of groundwater monitoring conducted on- and off-post during Quarter 15 (the December 2002 quarterly sampling event). Verification of data packages continued during Quarter 15. AFCEE chemists approved 13 groundwater data packages this quarter (from November 1, 2002, through January 31, 2003). These groundwater data packages included the September 2002 on- and off-post sampling events conducted under TO 0042, data package groups G, H, and I. Seven data packages are being validated by Parsons during this quarter for the December 2002 on- and off-post groundwater monitoring conducted under TO 0042, including data package groups J and K. 

Other data packages for site-specific soil and groundwater sampling conducted at various SWMUs and AOCs, for waste management, and/or during well installation were validated this quarter. Parsons is validating seven additional data packages received this quarter including TPDES compliance samples collected from the on-post GAC outfall (Outfall 002), screening groundwater samples collected during installation of CS-MW1-CC and waste characterization samples collected from AOC-55. The data packages currently being validated by Parsons include TO 0042 group E, TO 0042 group F, and TO 0009 group A.

A total of 83 SWMUs, AOCs, and Rifle Management Units (RMUs) have been identified at CSSA. Investigations have been conducted at 58 of those sites. Preparation of RFI/Closure Reports for CSSA SWMUs and AOCs continued during Quarter 15. During Quarter 15, draft reports for SWMUs I-1 and B-10 were reviewed by CSSA and AFCEE, and final reports for SWMU Building 43, AOC-50, B-32, AOC-65, and AOC-67 were submitted to TCEQ and USEPA. Of these, SWMU B-32 is submitted for RRS1 closure. 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 2. TCEQ approved closure of SWMU B-1, SWMU B-31, and SWMU B-22 during Quarter 15. CSSA has submitted closure recommendations for SWMU B-9, AOC-35, AOC-43, AOC-61, and SWMU B-32, which are pending comments from TCEQ. 

A teleconference was conducted December 23, 2002, among CSSA and Parsons personnel. Discussion of a strategy for remediation of SWMUs and AOCs, field investigations, and subsequent RFI/Closure reporting was discussed. This work is projected for funding during Quarter 16. 

There are currently thirty-one drinking water, livestock, and monitoring wells at CSSA. TO 0042 funds the installation of 17 new monitoring wells: 10 wells to be completed in the Lower Glen Rose Formation, two in the Bexar Shale, and five in the Cow Creek Formation. In addition, five 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 15, the well upgrades and the installation of eight new monitoring wells under TO 0042 have been completed. New well installations are expected to continue through Quarter 17. 

Parsons and the drilling subcontractor, Geoprojects International, Inc. (GPI) continued well installations during this period. Drilling was initiated at the CS-MW1-CC well location during the last quarter, and continued into the current quarter. The corehole was advanced to 352 feet below ground surface (bgs), and was geophysically logged. Reaming of the corehole to 12-inch diameter ensued to accommodate 8-inch surface casing. The Bexar Shale interval was cored, logged, and sampled during this reporting period. Groundwater from the Bexar Shale interval was sampled and found to contain low levels of PCE (1.3 µg/L), cis-1,2-DCE (3.22 µg/L), and toluene (40.4 µg/L).

Rather than continue drilling through to the Cow Creek Formation, the CC well was converted into a BS well. The well was completed during this reporting period and re-designated as CS-MW1-BS. The Bexar Shale/Cow Creek Formation contact was encountered at 380 feet bgs. The selected screen interval for the Bexar Shale was 340.5 to 365.5 feet bgs. The well was developed and groundwater was sampled for VOCs. The sample indicated the presence of the toluene (15.2 µg/L) and cis-1,2-DCE (2.16 µg/L) in the groundwater.

Based on the results of the BS well, a triple-cased drilling methodology was used for the CS-MW1-CC well to prevent contamination across the formations. Drilling, casing, and logging of the CC well commenced during the reporting period, and were completed by December 20, 2002. The triple-cased well was completed to a depth of 420 feet below grade (screened from 395 to 420 feet). Discrete interval groundwater sampling conducted within the Cow Creek interval indicates the Cow Creek is free of contaminants. The casing methodology appears to be successful in mitigating cross contamination from the upper zones.

Beginning January 6, 2003, drilling commenced at CS-MW2-CC. While the well drilling is still in progress, it is anticipated that the well will require a triple-cased completion so that the Lower Glen Rose portion will be isolated with 12-inch steel casing.

Groundwater and drilling fluids produced during drilling efforts at the CS-MW1-BS and -CC location were contained and were treated at the CSSA TPDES-permitted GAC unit located at Outfall 002. Parsons operated and maintained the GAC unit, and prepared a Discharge Monitoring Report (DMR) for each month to comply with TPDES requirements. Over 30,000 gallons of water that may contain VOCs was treated by GAC and released from Outfall 002. Sample results show that water discharged from the outfall contains less than the laboratory Method Detection Limit (MDL) of potential COCs. CS-MW2-CC groundwater and drilling fluids are being contained and treated during Quarter 15 and will continue in Quarter 16.

Locations and elevations of five benchmarks and six new wells were surveyed by Baker Surveying during the reporting period. Additional wells will be surveyed by Baker as they are completed.

The TO 0058 task order covers interim measures conducted at Building 90 and treatability studies at Building 90/AOC-65. The evaluation of soil vapor extraction as a treatment method is a subtask under TO 0058. Work continued during Quarter 15 on the Building 90/AOC-65 investigations, the soil vapor extraction (SVE) system, and vapor monitoring point (VMP) and vapor extraction well (VEW) installations and sampling. 

Initial soil gas screening data was obtained from vapor extraction wells (VEWs) installed inside Building 90 on December 3, 2003. A second round of soil gas screening and pressure response readings were taken on December 4, 2003, shortly after the SVE system installed outside Building 90 was started. This was done to determine if there was any influence or response in the subslab VEWs. After these initial readings were taken, the subslab blower system inside Building 90 was started and soil gas changes were monitored over the initial few hours following startup, and prior to system shut-down on December 11, 2002. Air emission samples were collected after one hour of operation, the following morning (December 5), and then periodically through December 11 (December 6, 9, and 11) for off-site VOC testing. Results from this testing were not received during this Quarter.

The Building 90 weather station and piezometer transducer recorders became operational on October 31, 2002. However, Parsons checked the weather station after two weeks of data recording and determined that the program set up for the transducers was not functioning properly. Parsons continued troubleshooting the program with the manufacturer’s technical staff during Quarter 15. As of December 17, Parsons notified CSSA that the weather station data recorder was fully functional, but that there continued to be minor problems with the transducer readings. 

Parsons began performing initial system checks and soil gas monitoring in accordance with the Treatability Test Plan on December 3, 2002. As part of this effort, groundwater samples were collected from three of the VEWs and submitted to DHL for analysis. Results from these samples were received on December 17, 2002, and forwarded to CSSA. Parsons chemists began conducting level 3 data review of this screening data. Parsons also collected six soil gas samples from VMPs/VEWs prior to startup of SVE to establish baseline VOC levels. An air emission sample was also collected from VEW-19 after one hour of operation. The high water level in this VEW caused the blower to overheat and shut off, so the treatability test could not be completed as described in the approved test plan. No results from the soil gas sampling were received during this quarter.

Results from the air emission samples collected from the subslab system, and the one-hour emission sample collected from VEW-19 prior to system shutdown indicated that the system appears to operate within the parameters of the Standard Air Exemption submitted to TCEQ for the two SVE systems. Emissions from the subslab system ranged from the rate of 0.06-0.35 tons per year, while emissions from VEW-19 were measured at 0.012 tons per year based on the one-hour reading. The subslab system was shut down on December 12 to await the data that verifies that it is operating within the air exemption limits. After a four-week idle period, the soil gas was retested inside Building 90 to assess any changes and recovery of VOC levels in subslab VEWs, and to conduct a pressure response/radius of influence test of the VEWs on the SVE system outside Building 90. The pressure response/radius of influence testing was initiated on January 15, 2003, and air emission testing of the seven VEW systems also started on January 15. This data will not be available for review until Quarter 16.

Startup testing of the Building 90 SVE system consisted of extracting soil gas from each of the 12 VEWs and monitoring soil gas concentrations and air flow. During the startup test, the SVE blower operated for seven days and soil gas and airflow readings were measured periodically on December 5, 6, 9, and 11. Results of the soil gas screening indicates that the concentrations increased with time during the initial phases (first few hours) of the test then declined steadily to concentrations significantly lower than pretest levels. Parsons will monitor soil gas concentrations in the VEWs/VMPs to assess the rate of accumulation of vapors in the subslab material.

The Interim Removal Action (IRA) at SWMU B-3 was initiated in Quarter 14 and continued into Quarter 15. The area formerly occupied by the PIMS field demonstration project soils was used to stage and stockpile wastes from SWMU B-3. A total of 732 LCY (916 tons) 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 (USEPA ID# TXD000838896 and TCEQ ID# 50212) and approximately 1,242 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 characterized and stockpiled for use as backfill. Due to the unanticipated size of SWMU B-3 and the increase of estimated in-place waste, the anticipated project funding requirements have also increased. Additional work has been suspended pending the necessary funding.

Investigations were initiated at AOC-55 in October 2002 to determine the extent of landfills and characterize the contents. Surface geophysical testing began on October 21, 2002 to define the perimeter of AOC-55. Slit trench investigations were initiated on October 29, 2002. Results of the investigation and waste characterization efforts indicate that approximately 35,000 cubic yards of class 2 non-hazardous waste is contained within AOC-55. Additionally, investigation results indicated explosive/ordnance material within the first two feet of surface soils, which will require additional screening and avoidance efforts during removal actions. Plans were revised due to the explosive/ordnance findings and re-submitted to the government for review and approval.

Parsons and CSSA updated the cumulative analytical results tables comparing detections to trip blank results during Quarter 15. Summary tables submitted in August 2002 were updated to include the September 2002 groundwater monitoring event and provided to CSSA this quarter for review. These analyte summary tables will be used in support of an updated list of contaminants of concern (COCs) for future groundwater sampling events. 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 15. 

A draft karst survey report was prepared by George Veni and Associates and provided to CSSA for review in Quarter 14. Internal review of the report was completed in November 2002, and the report was forwarded to Wayne Mandell of the Army Environmental Center for additional review. Mr. Mandell is the Army’s resident expert on karst issues at their facilities. His review was completed in January 2003. CSSA began compiling all comments on the survey report during Quarter 15, and will issue the comments to George Veni and Associates during Quarter 16 for resolution.

Preparation of the hydrogeologic conceptual site model (CSM) funded under RL83, WBS 04, continued during Quarter 15. Work completed on the model included the development of a Graphical User Interface (GUI) in MS Access to input model lithology and hydrology as well as construction data into the SDS SQL server. Preparation of well installation reports for cluster wells installed under RL83 also continued in Quarter 15. 

CSSA continued to produce fact sheets during Quarter 15. Fact Sheet 10, which provided a summary of cleanup activities at SWMU B-3 and AOC-65, was revised following CSSA comments and mailed to selected members of the CSSA mailing list. Fact Sheet 11, which summarized chloroform detections in drinking water wells, was finalized and sent to well owners along with the September 2002 result letters on December 13, 2002. Drafts of Fact Sheets 12 and 13, which summarize the September 2002 and December 2002 results, were forwarded January 9, 2003, to CSSA for review. Parsons will continue preparation of Fact Sheets 12 and 13 during Quarter 15 and mail the final fact sheets to the members of the CSSA mailing list. 

Parsons LAN support personnel completed construction of an ftp site for use by CSSA and any users authorized by CSSA. The purpose of the ftp site will be transfer of electronic files too large to send via email. The ftp site was introduced during Quarter 15 for use by CSSA and its contractors.

1. Percent Complete

The Facility Investigation task makes up approximately 45 percent of the RFI phase. As of the end of Quarter 15, this task is approximately 25 percent complete. 

2. Summary of Findings

Groundwater Monitoring

Quarterly groundwater monitoring for both on- and off-post wells was performed at CSSA from December 2-16, 2002. A map of the well locations sampled is provided in Figure 3.1 and Figure 3.2 of Attachment 3 of this report. These figures include monitoring well installations completed through the end of Quarter 15.

On-post Wells, December 2002: Three on-post drinking water and 28 monitoring wells were sampled December 10-16, 2002. Samples were collected at wells CS-1, CS-2, CS-9, CS-10, CS-11, CS-D, CS-G-LGR, CS-MW1-LGR, CS-MW2-LGR, CS-MW3-LGR, CS-MW4-LGR, CS-MW5-LGR, CS-MW6-BS, CS-MW6-CC, CS-MW6-LGR, CS-MW7-CC, CS-MW7-LGR, CS-MW8-CC, CS-MW8-LGR, CS-MW9-BS, CS-MW9-CC, CS-MW9-LGR, CS-MW10-CC, CS-MW10-LGR, CS-MW12-BS, CS-MW12-CC, CS-MW12-LGR, CS-MW16-LGR, CS-MW17-LGR, CS-MW18-LGR, and CS-MW19-LGR. Samples were analyzed by STL. Results of the December 2002 groundwater monitoring event will be formally reported in the draft December 2002 Quarterly Groundwater Monitoring Report to be submitted to CSSA and AFCEE during Quarter 16 for review and comments. Locations of the on-post wells sampled are provided on Figure 3.2 in Attachment 3.

Off-post Wells, December 2002: Twenty-six off-post groundwater wells were sampled December 2-6, 2002. Samples were collected at wells FO-22, FO-J1, HS-2, I10-2, I10-4, I10-5, JW-12, JW-13, JW-14, JW-26, JW-9, LS-1, LS-2, LS-3, LS-4, LS-5, LS-6, LS-7, OFR-1, OFR-2, OFR-3, RFR-10, RFR-11, RFR-12, RFR-3, RFR-6. All samples were analyzed by APPL. Results of the off-post groundwater monitoring will be formally reported in a draft December 2002 Quarterly Groundwater Monitoring Report to be submitted to CSSA and AFCEE during Quarter 16. Locations of the off-post wells sampled are provided on Figure 3.1 in Attachment 3.

Building 90/AOC-65 Investigation

On December 3, 2002, Parsons performed the startup and testing of the Building 90 Subslab and AOC-65 SVE systems. Prior to the startup of the system blowers, soil gas concentrations at SVE monitoring points were measured using a photoionization detector (PID) meter and an oxygen/carbon dioxide meter. The soil gas concentrations were measured to determine subsurface conditions prior to initiating the extraction tests. Soil gas concentrations, pressure readings and airflow rates were measured from the systems following initiation of the startup tests. After operating for eight days, there were significant reductions in the VOC levels in all tested VEWs. The system was shut down for a period of 30 days, after which soil gas at the VEWs were again measured. Complete rebound of VOC levels was observed in several of the VEWs when compared to the December 3, 2002, readings, but little or no rebound was noted in VEW-1, VEW-5, and VEW-6, suggesting that there is little or no contamination present in the areas influenced by these VEWs.

For the AOC-65 SVE system, soil gas was extracted from VEW-19 for the startup test and pressure responses were measured in VMPs 1 - 5. The AOC-65 SVE startup test was terminated prematurely after only four hours of operation because perched groundwater drew up and blocked the entire screened interval in the extraction well causing the blower to overheat and automatically shut down. During the abbreviated startup test, the pressure readings, with the exception of the shallow zone, did not exhibit significant responses suggesting little interconnection between the extraction zone and these monitoring zones. The pressure readings from shallow zones of VMP-4A (4’-10’), VMP-4B (1’–7’), and VMP-3 (38’-48’), the closest monitoring points to extraction well VEW-19 exhibited an almost instantaneous response indicating a direct vertical connection between the extraction intervals and these monitoring zones. Laboratory results of the soil gas samples collected during the startup tests have not been received. Parsons anticipates continuing the initial system check and testing of this system in January 2003.

Groundwater samples were collected from AOC-65 SVE extraction wells VEW-15, VEW-19, and VEW-16, and submitted to DHL for volatile organic compound (VOC) analysis (SW 8260B short list [acetone, methyl ethyl ketone, cis-1,2-dichloroethene, trans-1,2-dichloroethene, tetrachloroethene, trichloroethene, toluene, and isopropyl alcohol (tic)]). Results of the groundwater samples identified the presence of tetrachloroethene (PCE) at concentrations ranging from 35.5 micrograms per liter (μg/L) in VEW-15 to 546 μg/L in VEW-19. Trichloroethene (TCE) was present at concentrations ranging from 15.5 μg/L in VEW-15 to 73.3 μg/L in VEW-19. PCE was the only contaminant detected in the sample collected from VEW-16 (at 37.0 μg/L).

A meeting was held on January 20-21, 2003 at CSSA to discuss shallow groundwater data quality objectives (DQOs) as they relate to the recharge study.

3. Summary of Changes

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

4. Summary of Contacts

A meeting with Brian Murphy was conducted at Parsons’ Austin offices on November 18, 2002. The status of all delivery orders currently funded for CSSA was reviewed. 

Parsons personnel provided support to CSSA after Camp Bullis requested any meteorological data available for April 2002 and July 2001. Weather station data from the Well 16 weather station was provided to Garrett J. Smith on behalf of CSSA. 

5. Summary of Problems

AFCEE approved 15 data packages during Quarter 15. Cumulatively, 193 data packages have been approved through the end of Quarter 15. Approximately 42 data packages are pending submittal by CSSA, AFCEE comments and/or AFCEE approval. 

6. 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. 

7. Projected Work for the Next Quarter

Fact Sheets

Fact Sheets 12 and 13, summarizing the findings of the September 2002 and December 2002 Quarterly Groundwater Monitoring will be finalized and mailed to area residents who are members of the mailing list. 

Groundwater Monitoring

The next quarterly groundwater monitoring event will be conducted in March 2003. The upcoming event will include the existing CSSA drinking water and monitoring wells, approximately 25 off-post wells (VOCs only), seven post-GAC samples, and any newly completed and developed monitoring wells. On- and off-post quarterly sampling will be funded under TO 0042 in March 2003. O&M at the residential GAC filtration systems (LS-6, LS-7, OFR-3, RFR-10, and RFR-11) and on public water supply systems (LS-2/LS-3) will be conducted in Quarter 16.

Building 90/AOC-65 Investigation

Additional data collection at AOC-65 will be conducted in Quarter 16. Based on discussions of data collection needs, data collection for the groundwater recharge study will begin in Quarter 16 (pending occurrence of significant rainfall events). This work will include the purchase and installation of conductivity meters for selected wells.

Well Installations

Work will continue with the on-post well installation funded under TO 0042. Installation of Westbay-equipped wells will proceed in the next quarter.

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. Phase 1, completed within Quarter 15, expended the original budget to dispose of the hazardous and non-hazardous waste excavated and stockpiled from the SWMU B‑3 east trench. Phase 2, if funded, will continue efforts for the remaining hazardous and non-hazardous material within the west trench, which will complete the SWMU B-3 IRA.

In addition, it is anticipated that an SVE system will be installed near the east trench where hazardous soils were removed. Selected intervals in a 150 ft hot-spot soil boring will be packer tested to evaluate VOC migration and determine screen intervals for future VEWs. Planning and procurement for this effort will be initiated in Quarter 16.

AOC-55 Excavation

The removal action will be initiated during Quarter 16. The removal actions will consist of properly profiling the waste media encountered and excavation and transport of waste material. The excavation and disposal of approximately 35,000 cubic yards of Class 2 Non- Hazardous waste is estimated. Additionally, a low water crossing will be installed near AOC-55 at Salado Creek and when waste excavation work is completed, confirmation sampling will be conducted in order to close AOC-55 under Risk Reduction Standard 1. 

SWMU and AOC RFI/Closure Reports

Continued preparation and submittal of final RFI and Closure reports will be conducted in Quarter 16. Work will continue in Quarter 16 on the remaining draft RFI reports (SWMU B-23A) as well as the Final RFI reports (SWMUs I-1 and B-10) RFI/Closure reports to be made final will be submitted to the TCEQ. Soil sampling will be conducted at SWMU B-23A during Quarter 16. 

8. 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. Copies of these reports and analytical data are presented separately to the USEPA by electronic version on CD Rom, at the request of the USEPA. The CD Rom will be delivered to the USEPA three weeks following the submittal of each quarterly progress report, beginning with this Quarter 15 report.

Preliminary groundwater data for the December 2002 sampling event (on- and off-post) were received by Parsons in Quarter 14 and 15. Various screening data samples were collected under TO 0058 and TO 0009 delivery orders. Data package groups TO42E, TO42F, TO42J, TO42K, TO58F, and TO 0009 Group A) were received by Parsons during Quarter 15. These data packages were validated by Parsons’ chemists this quarter and will be submitted to AFCEE for approval during Quarter 16. Previously verified data packages under TO42 (groups G, H, and I) and TO58 (Group A, E and F) were approved by AFCEE during Quarter 15. 

In addition, an Annual Groundwater Monitoring report will be developed during Quarter 16. The Annual Report will provide a more detailed evaluation of historical groundwater trends and include information on the off-post GAC systems, preliminary findings from the recharge study and conceptual site model (CSM), and recommendations for additional work or scope modifications.

Task IV - Human Health and Ecological Risk Assessment

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 will depend on the number of sites requiring risk assessment.

Task V - Investigation Analysis

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 69 percent complete.

2. Summary of Findings

As described in Task III, 45 draft and 43 Final RFI reports have been completed and submitted to CSSA. As part of the preparation of these reports, investigation results were compared to closure criteria. A summary of recommendations is provided in Attachment 2. Based on the final reports submitted through Quarter 14, 19 were recommended for closure while the remaining sites may require future investigation and or cleanup. Through January 31, 2002, a total of 13 SWMUs or AOCs have been approved by TCEQ for closure. 

3. Summary of Changes

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

4. Summary of Contacts

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

5. Summary of Problems

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

6. Actions Taken to Correct Problems

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

7. Projected Work for the Next Quarter

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

8. 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

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. 

As part of the Task II Interim/Stabilization Measures, a treatability study for stabilization of the excavated soils was continued during Quarter 15. O&M activities on the PIMS study site included leachate monitoring efforts (includes sampling of lysimeters in August, September, October and December 2002) and maintenance activities. Monitoring of the field treatment efforts are expected to continue through May 2003. Monitoring data are anticipated to support closure/remediation efforts for evaluation of the PIMS treatment method for sites with similar contaminants of concern. Due to funding difficulties from ESTCP the planned bioassessment of PIMS treated and non-treated soils from SWMU B-20 are no longer anticipated. 

The SVE O&M assessment report will be finalized in Quarter 16. Its recommendations formed the basis for additional SVE treatability testing of fractured bedrock underlying SWMU B-3. The final SVE system assessment report will be submitted in Quarter 16 for inclusion into the Environmental Encyclopedia.

Treatability study activities scoped under TO 0058 were initiated in Quarter 15 at AOC-65. The weather station and piezometer transducer data recorder became operational on October 31, 2002, and encountered some difficulty in recording accurate data from the transducers. Troubleshooting was performed and the data recording function was monitored monthly and continues to be compared to actual water levels manually measured in the piezometers with water level indicators. The locations and elevations for all piezometers, VEWs, and newly installed monitoring wells were surveyed during Quarter 15. In addition, five benchmarks were installed at CSSA to facilitate future surveying projects. 

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 33 percent complete. 

2. 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.

3. Summary of Changes

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

4. 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 continued to consider some of the studies proposed by UTSA during Quarter 15. 

5. Summary of Problems

No problems related to the PIMS treatability studies occurred during this reporting period. 

6. Actions Taken to Correct Problems

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

7. 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. 

Monitoring and bioassessments of SWMU B-20 PIMS-treated soils for the PIMS treatability study is expected to continue during Quarter 16. Additionally, field scale treatability studies of soil density separation followed by phytoextraction of the previously sifted soil piles will continue in Quarter 16 as part of the treatability activities. 

8. 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. Five progress reports (January 2003 – January 2004) are currently 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 12 percent complete.

2. Summary of Findings

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

3. Summary of Changes

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

4. Summary of Contacts

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

5. Summary of Problems

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

6. Actions Taken to Correct Problems

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

7. Projected Work for the Next Quarter

The Progress Report for Quarter 14 will be submitted.

8. 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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