DQO Meeting Minutes
Treatability study for area of concern 65
Camp Stanley Storage Activity
F41624-00-D-8024/Delivery Order 0058
Parsons 740999.02010

Date:        May 2, 2002

Time:        9:00 A.M. - 5:30 P.M.

Place:       Camp Stanley Storage Activity (CSSA)

Subject:    Discuss Data Quality Objectives (DQOs), project status, plan future geophysical testing, and discuss comments on draft Sampling and Analysis Plan for TO 0058.

Attendees:

*Minutes prepared by Brian Vanderglas, Parsons.

These meeting minutes are organized in the order discussed.

CSSA Comments to Sampling and Analysis Plan Addenda

The meeting was opened with a discussion of CSSA's comments to the Sampling and Analysis Plan (SAP) Addenda to the Environmental Cleanup Plan for the AOC-65 Treatability Study.  Specific CSSA comments to the SAP and Parson's responses follow:

Yes, the subslab ventilation system and the AOC-65 SVE system installed west of the building will both use the same carbon canister for vapor phase treatment.

Parsons will change the language to more accurately reflect the goal of the removal activities.  The soil sample results from the excavation limits may be used at a later date in support of closure of the AOC for soils.  Therefore, the soils sampling of the excavation should comply with AFCEE's QAPP requirements.  Additionally, the soil samples should be analyzed all constituents detected above regulatory limits at AOC-65 including VOCs, PCBs, TPH, lead, mercury, chromium, cadmium, and zinc.

At this time, Parsons does not have detailed information about site conditions on which we can base an accurate estimate of the equilibration time.  However, we tentatively estimate that it will require between 14 and 28 days based on our experience at B-3. 

Parsons anticipates having the O & M Plan completed approximately 30 days after the completion of the SVE treatability tests.  The results of the treatability tests will provide guidance regarding optimization of the system performance, monitoring frequency, anticipated carbon usage and other items pertinent to the  O & M of the system.

At this point we do not know the specifics about the system performance to predict the frequency required for the system monitoring.  Data collected during the treatability tests will provide guidance for the appropriate monitoring frequency.  Recommendations for system monitoring will be included in the system O & M Plan.

Under the Modification 02 scope of work, Parsons assumed that CSSA would manage the replacement of the carbon canisters as planned for the Well 16 GAC.  Parsons will include the replenishment of the carbon canisters into the scope of work for the TO 0058 task order.

Parsons will use system performance information collected during the treatability tests to estimate carbon-loading rates.  We will establish conservative estimate for system operation that will maximize carbon usage while ensuring that the accumulation of VOCs in the carbon material does not exceed a concentration that would result in classification of the carbon as a hazardous material.

Sampling of groundwater encountered during drilling was not included in the TO 0058 scope of work.  Parsons agrees with CSSA that sampling groundwater during drilling will provide additional information regarding the distribution of contaminates at AOC-65.  Therefore, the SAP will be modified to include the collection of groundwater samples from the boreholes. 

AFCEE Review of Plans and Reports

    Parsons indicated that the draft December 2001 Quarterly Groundwater Monitoring Report is waiting for AFCEE comments for finalization.  CSSA indicated that the report could be finalized without AFCEE comments.  In addition, CSSA indicated that they would discuss with AFCEE which reports from the various on-going projects will require AFCEE review.  For reports not requiring AFCEE review, CSSA will provide governmental review for these documents.  CSSA will provide Parsons with a list of reports that will require AFCEE review or AFCEE will notify Parsons immediately upon receipt of a document if it does not intend to conduct a review.

Status of TO 0058 Tasks

    Parsons presented a summary of the status of the Task Order activities by WBS.

Task Order Management (wbs 01 task)

Karst Expert:      Parsons is currently working on identifying a Karst expert to subcontract the peer review and technical coordination of CSSA's Karst Expert, George Venni and Associates.  Parsons will identify and complete contractual arrangements with a Karst expert prior to the planned Karst Meeting (see Meeting section below), so the expert can participate in the meeting.

Procurement:     Parsons has initiated or completed a majority of the procurements for the TO 0058 activities.  The subcontractor bid package for the removal action is currently being developed and will be ready for CSSA review by the end of May.  Parson's original plan was to have the removal contractor provide the roll-off boxes used for to contain the solids and liquids generated during the drilling activities.  However, since selection and procurement of the removal contractor will not be completed prior to the start of drilling (see Treatability Study section below), an alternate contractual means of providing the roll-off boxes is needed.  Parsons will investigate the possibility of using the established roll-off vendor subcontract for the TO 0042 task order to provide the necessary roll-offs for the TO 0058 activities.

Meetings (wbs 02 task)

Karst Meeting:   The tentative schedule for the Karst Meeting is approximately 60 days after George Venni and Associates completes their field work.  Parsons will attend the meeting and will have contracted Karst expert also attend the meeting.

TIM #3 Meeting: Since Brian Murphy plans to be in Parson's Austin office on April 8, a brief meeting was tentatively scheduled to discuss TO 0058 activities.  Tentative items to be discussed include preliminary results of the 2D seismic surveys, potential well locations, and task order DQOs.

Removal Action (wbs 03 task)

Air Permitting:   Parsons is working on the standard exemptions for the SVE discharges at Building 90.  The standard exemptions will be developed based on direct discharge of the soil gas from the SVE system to the atmosphere.  Parsons anticipates that the discharge levels from the SVE system will be below the maximum allowable limit under the standard exemption.  The vapor-phase carbon treatment unit will not be included in the standard exemption but will be added to the system as an additional precautionary measure.  By not including the carbon treatment unit in the standard exemption, regulatory prescribed monitoring of the carbon unit can be avoided.

Removal Action: On April 29, Parsons completed the soil borings for establishing the extent of impacted soils outside Building 90.  Sample results are from DHL by May 13.  Results of the soil samples will be used to determine the locations where soil excavation will be conducted.

Subslab SVE:      On April 30, Parsons collected soil gas samples for field screening from the 12 subslab ventilation wells inside Building 90.  Based on the field screening results, Parsons has identified five wells (VEWs # 1, 3, 8, 11, and 12) that exhibited low O₂ and high CO₂ which indicates that biological activity is occurring.  Parsons will collect soil gas samples from these wells for TO-14 analysis.  Parsons will also select two wells with high O₂ and low CO₂ for TO-14 sampling to provide verification that the O₂/CO₂ concentrations are associated with the degree of biological activity.  Parsons field sampling personnel noted a strong PVC glue odor during the soil gas sampling event, which indicates that the ventilation piping system should be purged prior to the TO-14 sampling.  Parsons proposes to connect low flow pumps to the SVE piping and allow the pumps to run aver a weekend to purge residual volatile components from the glue prior to TO-14 sampling.  Additionally, Parsons will consider adding methyl ethyl ketone (MEK) and acetone to the TO-14 analyte list to evaluate the presence and concentration of these glue-based volatile compounds.

Restoration & Engineering Design:    The schedule for completing the removal action subcontractor selection was discussed.  Parsons anticipates completion of the draft subcontractor bid package by May 14.  CSSA indicated that they would need 3 days to complete their review of the draft bid package.  Parsons plans to have the final bid package completed by May 24 and conduct the pre-bid meeting with potential subcontractors between May 28 and May 31.  With this schedule, it may be possible that the removal action subcontractor can mobilize to the site by mid-June to start the removal actions.

Treatability Study (wbs 04 task)

Surface Geophysics:      Parsons completed approximately 5500 feet of 2D seismic reflection surveys over three separate survey lines at CSSA between April 15 and 22.  Parsons anticipates completion of preliminary results from the seismic surveys in time to review the results during the possible meeting in Austin tentatively scheduled for May 8.  Parsons has scheduled additional electrical resistivity surveys with induced polarization capabilities for two weeks beginning May 20.  Prior to mobilizing to the site to complete additional resistivity surveys, Parsons will compare the resistivity and seismic results to determine which method is providing the desired results and where additional survey data is needed.  If Parsons determines that the seismic method is providing the best results, Parsons will not mobilize the resistivity system and will initiate preparation of a subcontract for 2D and 3D seismic surveys to complete the planned geophysical characterization activities.

Drilling Schedule:         Parsons has tentatively scheduled the drilling for the installation of the piezometers, VEWs and VMPs to start on May 13.  Parsons plans to begin the drilling activities by drilling and installing the VMP located east of Building 90.  A soil gas extraction packer test is planned on the corehole for this first VMP.  At CSSA's request, Parsons will notify the TNRCC and U.S. EPA at least two weeks in advance of the start of drilling if possible.

Treatability System Configuration:      Parsons is finalizing procurement for the weather station and SVE equipment.  At CSSA's request, Parsons will instruct the weather station supplier to set up the data logger to collect the same parameters and use the same data format as the weather station currently in operation at Well 16.  Additionally, Parsons will add information regarding the weather station parameters and measurement cycles to the SAP addenda.

System O & M:   Previously discussed during the CSSA comments to the SAP addenda.

Reporting & Technology Evaluation (wbs 05 task)

Geophysical Test Report:         The comprehensive Geophysical Test Report is currently scheduled to be completed by August 12, 2002.

TO 0058 DQOs

    The draft TO 0058 DQOs were reviewed and discussed by the meeting attendees.  The draft document presents the development of the task order DQO following the U.S. EPA guidelines.  The format and structure of the document was approved.  The attendees reviewed Sections 1 through 4 of the draft DQO document and made recommendations for changes.  It was determined that Sections 5 of the document, which addresses the development of the decision rules, requires additional changes to make the decisions more specific.  Parsons agreed to revise Section 5 of the DQO document and submit a revised draft.

Action items

Agenda for Data Quality Objectives Meeting at CSSA-Task Order 0058, Modification No. 2 DQOs & Status of Tasks