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6th Quarter - Final Quarterly Progress Report
Interim/Stabilization Measures
Interim Measures (IM) will be conducted to mitigate a current or potential threat to human health and/or the environment. The IM is estimated to represent approximately 30% of the required actions at CSSA. The IM includes Interim/Stabilization Measures Work Plan (7% of IM), Interim Measures Implementation (70% of IM), and Reports (23% of IM). At the end of Quarter 6, the IM is approximately 47% complete.
Task I - Interim/Stabilization Measures Work Plan
The Interim/Stabilization Measures Work Plan includes A) a description of on-going and planned interim measures; B) a statement of the objectives of each interim/stabilization measure, including how the measure mitigates a potential threat to human health and the environment and is consistent with and integrated into any long-term remedy for CSSA; and C) proposed locations, design plans and specifications, construction, operation, and maintenance requirements of the interim measures, including a sampling and analysis plan. To the extent possible, existing plans which are included in CSSA’s Environmental Encyclopedia will be referenced. As of August 2, 1999, completion of this task has been fully funded (under delivery order RL74).
The original IM Work Plan was submitted in August 1999. The design of the cap was modified and a revised work plan reflecting the new design was submitted in October 1999. The IM work plan has been incorporated into the CSSA Environmental Encyclopedia (Volume 1-2, SWMU O-1). Parsons ES received authorization from the EPA on July 11, 2000 to proceed with the planned IM actions at SWMU O-1. On July 17, 2000, CSSA notified TNRCC of planned IM activities at SWMU O-1 with no comments received.
Percent Complete
This task makes up approximately 7% of the IM phase. This task is 100 percent complete.
Summary of Findings
No new findings associated with the IM Work Plan during this reporting period.
Summary of Changes
No changes associated with the IM Work Plan during this reporting period.
Summary of Contacts
No contacts related to the IM Work Plan were made during this reporting period.
Summary of Problems
No problems related to the IM Work Plan were observed during this reporting period.
No actions to correct problems necessary during this reporting period.
Projected Work for the Next Quarter
No new work is projected on the IM Work Plan during the next reporting period.
Copies of Daily Reports, Inspection Reports, Data, etc.
No daily reports, inspection reports, or data related to the IM Work Plan were generated during this reporting period.
Task II - Interim/Stabilization Measures Implementation
The Interim/Stabilization Measures Implementation includes sampling and analysis of groundwater from off-site wells; sampling and analysis of groundwater in CSSA wells; location of all off-site water wells located within ¼-mile of the facility boundary; evaluation of alternative measures and implementation of selected interim measures at SWMU O-1; closure of SWMU O-1; characterization and determination of proper disposition of SWMUs B-8, B-20, B‑24, B-28, and the DD soil piles; and implementation of the identified disposition method. The status of each is described below.
Completion of this task has been partially funded. One round of sampling and analysis of three off-site wells, located to the west of CSSA and identified as RFR-3, RFR-8, and JW-30 (under RL74) and eight rounds of sampling and analysis of CSSA wells has been completely funded (under DO23, RL74, and RL83), along with interim measures and partial facility closure of SWMU O-1 surface soil unit (under RL74). The vadose zone and groundwater portion of SWMU O-1 closure will be addressed during future work and is currently not funded. An appropriate disposition method will be identified for the soil piles (under RL83). However, final implementation of the yet to be selected disposition method is not funded. Due to the amount of soil in these piles, it is anticipated that funding may be spread over several years.
Off-site groundwater sampling was funded during the reporting period under the AETC contract, DO 5084. CSSA is currently in the process of identifying private wells, and obtaining access agreements, in the next quarter, from private well owners to allow sampling of their off-site wells.
Activities completed between August 1, 2000 and October 31, 2000 include the following:
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A draft version of the Off-site Well Survey was submitted to CSSA and AFCEE for review on August 4, 2000. The report compiled data for off-site wells that could be identified within a ¼-mile of the CSSA facility. The report documentation included available data regarding ownership, use, and well construction. Government comments were received on September 11, 2000, and responses were provided on September 29, 2000 by Parsons ES. Upon approval of responses, the final version of the well survey report will be prepared and submitted and will be located in CSSA’s Environmental Encyclopedia (Volume 5, Groundwater Investigation). |
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Quarterly groundwater monitoring of the on-site wells was performed the weeks of September 11, 2000 (Wells 1, 2, 9, 10, 11, 16, and I) and September 18, 2000 (Wells MW1 and MW2) at CSSA. One off-site sample was also collected at well LS-7 on September 13, 2000. Samples were analyzed by O’B&G, and results were submitted to Parsons ES on October 16, 2000. The preliminary non-validated groundwater results were forwarded to CSSA on October 20, 2000. The quarterly groundwater monitoring report is anticipated to be finalized in the next reporting period and will be inserted into CSSA’s Environmental Encyclopedia (Volume 5, Groundwater Monitoring). |
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CSSA has been in communication with the US Army’s Groundwater Extraction and Treatment Effectiveness Review team, the “Blue Dart” team, who specialize in evaluating groundwater contamination problems associated with Army facilities. The “Blue Dart” team visited CSSA on October 25, 2000 through October 27, 2000. When available, meeting minutes will be provided to the US EPA and TNRCC and will be located in CSSA’s Environmental Encyclopedia (Volume 1-1, Meeting Minutes). |
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Delivery
order (DO) 5084, through the Randolph AFB contracting office, was issued to
Parsons ES to continue RFIs at two locations (AOC-65 and AOC-67), perform
soil gas surveys, perform on-site groundwater sampling from three monitoring
wells MW |
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After EPA’s approval of the SWMU O-1 IM Work Plan, July 11, 2000, excavation of contaminated soils was completed in Quarter 6. An approximate total of 1,515 tons of soil were removed and disposed at Covel Gardens landfill facility operated by Waste Management Inc. in San Antonio, Texas. Clean backfill was placed in the excavated area and a clay cap was constructed in accordance with plans and the certifying engineer’s specifications and at this time no additional subcontracting efforts are planned for the IM at SWMU O-1. The interim measures activities for SWMU O-1 were completed on August 18, 2000. A partial facility closure report documenting interim measures was submitted on October 18, 2000 to the US EPA and the TNRCC and can be found in CSSA’s Environmental Encyclopedia (Volume 3-1, Oxidation Pond). |
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Efforts related to treatability studies, planned as part of the IM on sifted soil piles at SWMUs B-8, B-20, B-24, B-28 and DD was continued during Quarter 6. Investigation and characterization sample collection at SWMUs B-8, B-20, B-24, B-28 and DD for determining proper disposition and/or treatment of the excavated soils was completed during Quarter 4. Analytical results were received from the laboratory in May 2000. Validation of the analytical data was continued during Quarter 6. |
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A treatability study for stabilization of the excavated soils at SWMUs B-8, B-20, B-24, B-28 and DD was continued during Quarter 6. The Environmental Security Technology Certification Program (ESTCP) and UFA Ventures, Inc. are demonstrating a stabilization process using Phosphate Induced Metal Stabilization (PIMS) on soils contaminated with lead and other metals. The PIMS laboratory benchscale treatability study was completed during Quarter 5. Results of the benchscale treatability study indicate that the PIMS stabilization process may be applicable in reducing leachable lead content and to inhibit the bioavailability of the lead into the environment. The initial results of the treatability study are further discussed under Task VI (Treatability Studies). It is anticipated that a field scale treatability study will be initiated during Quarter 8. Additionally, the Draft Soil Disposition Assessment Report is expected to be completed, along with the initiation of two other treatment technologies (density treatment and phytoextraction), during the Quarter 8. All efforts regarding treatability studies will be documented in CSSA’s Environmental Encyclopedia Volume 4 behind appropriate tabs (i.e., pyhtoremediation, stabilization, etc.). |
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A waste removal action was initiated at SWMU B-10 to remove non-hazardous waste, composed of metal banding material and general scrap metal. The removal effort includes segregation the metal banding material for recycling (Nuell) and disposal of soils at an off-site land disposal facility (Waste Management’s Covel Gardens facility). |
Percent Complete
This task makes up approximately 70% of the IM phase. This task is considered 39% complete.
Summary of Findings
Quarterly groundwater monitoring of the on-site wells, and one off-site well was performed during the weeks of September 11 and 18, 2000 at CSSA. A map of the well locations was provided in Attachment 3 of the 4th Quarterly Report.
On-site Wells, September 2000: CSSA wells 1, 2, 9, 10, 11, 16, I, MW1, and MW2 were sampled during the September 2000 sampling event. Wells D, G and H were not sampled during this event either because the water levels in the wells were too low (wells D and G) or the well is inoperable (well H). Results of the September 2000 groundwater monitoring event will be formally reported in a draft Quarterly Groundwater Monitoring Report to be submitted to CSSA and AFCEE during Quarter 7 and once finalized placed into CSSA’s Environmental Encyclopedia, Volume 5.
Off-site Wells, September 2000: One off-site sample was collected at well LS-7 during the September 2000 sampling event. Samples were analyzed by O’B&G, and results were submitted to Parsons ES on October 16, 2000. Results of the September 2000 groundwater monitoring event will be formally reported in a draft Quarterly Groundwater Monitoring Report and submitted to CSSA and AFCEE during Quarter 7 and once finalized placed into CSSA’s Environmental Encyclopedia, Volume 5.
Summary of Changes
No changes were made for the IM activities during this reporting period.
Summary of Contacts
No contacts were made for the IM activities during this reporting period.
Summary of Problems
No problems associated with IM activities this reporting period.
No actions to correct problems associated with IM activities necessary this reporting period.
Projected Work for the Next Quarter
Procurement activities associated with treatability studies for the soil piles will continue next quarter. Procurement of subcontractors Brice Environmental Inc., for density treatment, and EdenSpace Co., for phytoextraction field treatability demonstration services at SWMUs B-8, B-20, B-24, B-28 and DD are expected to be completed during the next quarter.
The IM removal actions at SWMU O-1 are complete. CSSA will continue with the operation and maintenance activities for SWMU O-1 until a final remedy of the associated vadose and groundwater zones is complete. Removal actions at SWMU B-10 are expected to be continued during the next quarter. Additionally, removal actions are expected to be initiated in the next quarter for non hazardous waste within AOC 50.
The next quarterly groundwater monitoring event will be conducted in December 2000, and is anticipated to include 11 on-site wells 1 off-site well. The sampling team will evaluate water levels to determine which wells have adequate water present to sample. If adequate water is present, Well D will be sampled as priority of well G. Groundwater samples will be collected at off-site well LS-7 to maintain sampling frequency.
Copies of Daily Reports, Inspection Reports, Data, etc.
Copies of the daily reports, inspection reports, and/or data related to the IM Implementation at SWMU O-1 from Quarter 6 were included in the O-1 IM/Partial Facility Closure Report submitted October 18, 2000. The copies of the daily reports can be found in CSSA’s Environmental Encyclopedia Volume 3-1, behind the tab Oxidation Pond and in appendix 3 of the IM/Partial Facility Closure Report.
Reports associated with the IM include progress reports and an IM/Partial Facility Closure Report for SWMU O-1. Additionally, draft March 2000 Groundwater Monitoring Report and the draft Off-Site Well Survey Report were submitted in August 2000. The O-1 IM/Closure Report documented IM activities conducted at SWMU O-1. In addition, it documents that the project is consistent with design specifications and was performed adequately.
Completion of this task has been partially funded. Progress reports for two years (August 1999 – May 2001) have been funded under RL83 of the AMC contract. Another six progress reports (July 2001 – October 2002) has been funded under DO5084 of the AETC contract. In addition, the IM Report associated with SWMU O-1 has been completely funded (RL74).
While the determination of an appropriate disposition method for the soil piles has been funded, actual completion of the soil pile IM will likely be spread over several years due to other funding priorities. The IM Report will be in three phases. The first phase will be a baseline report, the second phase will be a progress report, and the third phase will be a final report at the completion of the project. Funding for the first two phases is anticipated to be completed in the next fiscal year. Currently it is uncertain if the budget for the next fiscal year will fully fund the third phase, and may carry over to the following fiscal year.
Each phase of the IM Report shall include, but not limited to, the following elements:
Synopsis of the interim/stabilization measures and certification of the design and construction;
Explanation of any modifications to the plans and why these were necessary for the project;
Listing of the criteria for judging the functioning of the interim measures, and also an explanation of any modification to these criteria;
Results of the monitoring activities, and an evaluation of the extent to which the interim/stabilization measures will meet or exceed the performance criteria; and
Description of the operation and maintenance (including monitoring) to be undertaken.
Percent Complete
This task makes up approximately 23% of the IM phase. With completion of this progress report, this task is approximately 52% complete.
Summary of Findings
No findings associated with progress reports this reporting period.
Summary of Changes
No changes associated with progress reports this reporting period.
Summary of Contacts
No contacts related to the IM Report were made during this reporting period.
Summary of Problems
No problems associated with progress reports this reporting period.
No actions to correct problems necessary during this reporting period.
Projected Work for the Next Quarter
Preparation of the draft IM report will begin next quarter.
Copies of Daily Reports, Inspection Reports, Data, etc.
No daily reports, inspection reports, or data related to the report generated during this reporting period.