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9th Quarterly Progress Report, May 1 - July 31, 2001
Interim Measures
IM
are being conducted to mitigate a current or potential threat to human health
and/or the environment. The IM are
estimated to represent approximately 30% of the required actions at CSSA. The IM include Interim/Stabilization Measures
Work Plan (7% of IM), Interim Measures Implementation (70% of IM), and Reports
(23% of IM). Based on information
currently available at the end of Quarter 9, the IM are approximately
41% complete.
Task I - Interim/Stabilization Measures Work Plan
Task Description
The Interim/Stabilization Measures Work Plan includes:
a description of on-going and planned interim measures;
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
proposed locations,
design plans and specifications, construction, operation, and maintenance
requirements of the interim measures, including a sampling and analysis
plan. Existing plans, which are
included in CSSA’s Environmental Encyclopedia, will be referenced to the extent
possible. As of August 2, 1999,
completion of this task is fully funded under delivery order RL74.
Activities this Quarter
The
off-post and on-post groundwater sampling plan addenda were revised based on
modification to AETC DO5084. This
modification removed four rounds of on-post groundwater sampling from three
wells and two rounds of off-post sampling of 20 wells and added three rounds of
on-post sampling. The three rounds of
on-post sampling includes sampling of 24 wells in June 2001, increasing to 28
wells during the September and December 2001 sampling events as newly installed
monitoring wells are incorporated into the sampling scheme.
Percent Complete
This
task makes up approximately 7% of the IM phase and is 100 percent complete.
Task II - Interim/Stabilization Measures Implementation
Task Description
The
Interim/Stabilization Measures Implementation includes sampling and analysis of
groundwater from off-post wells; sampling and analysis of groundwater in CSSA
wells; identification of all off-post 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. Although activities at AOC 50
to remove the nickel penetrate waste are not included in the Order as an IM, this
task is also considered to include the work at this site. The status of each is described below.
Completion
of this task is partially funded along with interim measures and a partial
facility closure of SWMU O-1 under RL74. In addition, sampling of 20 off-post wells for 4 quarters (VOCs only) is
funded under AETC DO5084. This task was
originally funded for 6 quarters, but funding from two of the quarters was
removed in May 2001 to partially fund three quarterly on-post groundwater
sampling events from June through December 2001. The first round of off-post groundwater sampling under DO5084 is
tentatively scheduled to begin in September 2001.
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.
A water well survey
was conducted (under RL 83) to identify all wells within 0.25 miles of the CSSA
facility boundary. The final version of the Water Well Survey Report will be
submitted during Quarter 10.
Activities this Quarter
| CSSA finalized the Off-Post Monitoring Response Plan. This Plan provides a brief history of CSSA groundwater contamination, outlines potential off-post wells for sampling, and includes VOC action levels and Army responses. In addition, letters requesting site access and formal access agreements for the potential off-post sampling effort have been finalized. Both of these documents are integral to the off-post sampling effort. | |
| CSSA has finalized Fact Sheets 1 and 2 that give a general overview of the CSSA environmental program and environmental concerns. These fact sheets will be mailed to the community in early August. | |
| Preparations are being made to install granular activated carbon (GAC) wellhead treatment at off-post well LS-7. Vendors have been contacted and preliminary cost estimates are being reviewed. The installation of this GAC unit will be done in accordance with the Off-Post Monitoring Response Plan. | |
| CSSA is currently in the process of identifying private wells for off-post groundwater sampling under the AETC contract DO5084. CSSA evaluated their public communication plan with regard to this off-post sampling, and began the process of public notice and obtaining access agreements from private well owners to allow sampling of the selected off-post wells. Sampling of 20 off-post wells will begin after access agreements are finalized in September 2001. | |
| Work resumed at AOC 50 after the discovery of a disposal trench and additional nickel penetrate buried in the subsurface. A new waste profile was generated for the disposal of trench wastes discovered in March 2001. The profile was submitted to Waste Management, Inc. along with analytical data that characterized the waste stream in June 2001. The waste profile was accepted on July 6, 2001. Eagle Construction and Environmental Services re-mobilized to the site on July 16, 2001 to collect approximately 150 cubic yards of stockpiled trench contents and an additional 100 cubic yards of soil laden with nickel penetrate for transport to Coral Gardens Landfill in San Antonio, Texas, where the waste was disposed. | |
|
Parsons ES is currently incorporating
changes into the final version of the Water Well Survey. Recent data acquired from Camp Bullis was
reviewed to determine the proximity and applicability to the report. The review showed that only one Camp Bullis
monitoring well was located within 1 mile of CSSA. The remaining Camp Bullis wells, located at potential hazardous
waste sites, are located distances of 2 to 4 miles from CSSA, and are not
considered relevant to the well survey report. Additional data received during a meeting with the Bexar Metropolitan
Water District on July 2, 2001 is also being incorporated into the final
report. The final version will be
submitted as a new section to the CSSA Environmental Encyclopedia (Volume 5, Water Well Survey)
during Quarter 10. |
|
|
Quarterly groundwater monitoring of the
on-post wells was performed the week of June 11, 2001. CSSA wells 1, 2, 9, 10, 16, D, G, H, I,
MW1-LGR, and MW2-LGR, MW3-LGR, MW4-LGR, MW5-LGR, MW6-CC, MW6-BS, MW6-LGR,
MW8-CC, MW8-LGR, MW9-CC, MW9-BS, and MW9-LGR were sampled. In addition, one off-post sample was
collected at well LS-7 on June 12, 2001. The locations of the sampled wells are shown on Figure 2.1 in
Attachment
2. Well 11 was not sampled
during this event because the pump control panel was not functioning at the
time of sampling. Samples were analyzed
by APPL and results were submitted to Parsons ES in mid-July, 2001. Preliminary unvalidated groundwater results
are included in
Attachment
2. In addition, quarterly groundwater
monitoring reports for December 2000 and March 2001 were issued for inclusion
into the CSSA Environmental Encyclopedia (Volume 5, Groundwater Monitoring)
during this reporting period. |
|
| Efforts relating to the determination of proper disposition of previously sifted soil piles at SWMUs B-8, B-20, B-24, B-28, and Demo Dud (DD) were continued in Quarter 9. In Quarter 7, samples were collected from the sifted soils within SWMUs B-8, B-20, B-24, B-28 and DD and analyzed for TCLP metals to determine proper disposition. Analytical results received in Quarter 8 indicate that all excavated soil piles are non-hazardous as defined in 30 TAC Chapter 335, Subchapter R. The Draft Soil Disposition Assessment Report is expected to be completed, along with the initiation of bench-scale studies of other treatment technologies (e.g., density treatment, phytoextraction, etc.) during Quarter 10. | |
| A treatability study for stabilization of the excavated lead-contaminated soils at SWMU B-20 continued during Quarter 9. The initial results of the treatability study, which is being conducted by UFA Ventures, ESTCP, with support from Parsons ES, are further discussed under Task VI (Treatability Studies). The UFA Ventures treatability study will be incorporated into Volume 4 of the CSSA Environmental Encyclopedia. The PIMS field scale treatability study construction efforts were completed during Quarter 9. The PIMS field scale treatability study monitoring efforts are expected to continue through August of 2002. A final report of the PIMS treatability study is expected in September 2002. | |
| The CSSA GAC water treatment unit was brought on-line during Quarter 9. Treatment of purged groundwater from the MW8 well cluster began the first week of May 2001. Treatment began after discrete interval groundwater samples from the borehole indicated concentrations of contaminants above the MCLs. The GAC unit operates at a maximum capacity of 20 gallons per minute (28,800 gallons per day). During its two week treatment period for MW8 groundwater, 20,020 gallons of groundwater were treated at the GAC unit. The treated water was discharged at the TPDES-permitted outfall 002. | |
|
CSSA held a meeting on July 12, 2001 to
plan public communication strategy for notifying local government/community
representatives, media and local residences related to the CSSA groundwater
investigation program and obtaining access to off-post residences. Meetings were held with Bexar Metropolitan
Water District, the Edwards Aquifer Authority, Fort Sam Houston, and Fair Oaks
Water Company. Additional meetings were
also held with the Alamo Area Council of Governments. Also, congressional notices and fact sheets were mailed to area
state and federal legislators. Minutes
from the July 12, 2001 strategy meeting are presented in
Attachment 3. Lists of attendees and meeting agenda
(minutes) from the meetings held to discuss the CSSA groundwater investigation
program are also included in
Attachment 3.
|
Percent Complete
This task makes up approximately 70% of the IM phase. This task is considered 29% complete, based on the current projected activities listed in Task II, Task Description. The percent complete for this task has been adjusted to include on-post groundwater which was initiated in January 2000. As a result of this modification to the scope for this task, the percent complete is lower than reported during Quarter 8. If investigation results at other sites indicate an immediate threat to human health or the environment such that IM activities are warranted at additional sites, the percent complete will be adjusted accordingly.
Summary of Findings
Quarterly groundwater monitoring of the on-post wells and one off-post well was performed during the week of June 11, 2001 at CSSA. A revised map of the well locations is provided as Attachment 2 of this report. This map includes well installations completed through the end of Quarter 9.
On-post Wells, June 2001: CSSA wells 1, 2, 9, 10, 16, D, G, H, I, MW1-LGR, MW2-LGR, MW3-LGR, MW4-LGR, MW5-LGR, MW6-CC, MW6-BS, MW6-LGR, MW8-CC, MW8-LGR, MW9-CC, and MW9-BS were sampled during the June 2001 sampling event. Well 11 was not sampled during this event because the pump control panel was not functioning at the time of sampling. Results of the June 2001 groundwater monitoring event will be formally reported in a draft Quarterly Groundwater Monitoring Report which will be submitted to CSSA and AFCEE during Quarter 10 and placed in the Environmental Encyclopedia, Volume 5. A table showing preliminary unvalidated laboratory results is included in Attachment 2.
Off-post Wells, June 2001: One off-post sample was collected at well LS-7 during the June 2001 sampling event. Samples were analyzed by APPL. Results of the June 2001 groundwater monitoring event will be formally reported in a draft Quarterly Groundwater Monitoring Report to be submitted to CSSA and AFCEE during Quarter 10 and placed in the Environmental Encyclopedia, Volume 5. Preliminary unvalidated laboratory results for the off-post well sampling are included in Attachment 2.
Summary of Changes