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Section 16 - TO0008 Work Plan Addendum for Groundwater Sampling

16.1 - Statement of Objective

This addendum to the work plan describes activities in support of quarterly groundwater monitoring that will be performed under this delivery order beginning in September 2003.  A total of three events of groundwater monitoring will be conducted from designated on-post and off-post wells through June 2004.  Ancillary tasks also addressed with this addendum are work plan addendum to the existing documents already present in the CSSA Environmental Encyclopedia, laboratory audits to review the specific analytical methods associated with this project, monthly sampling at multi-level sampling system wells (Westbay^®) located both on- and off-post, provide a Site Survey Report (SSR) to determine the feasibility of installing an irrigation system to re-use Outfall 001 effluents, and provide GIS support at the CSSA-facility computer network.  The field investigation will be documented in a field report, and data obtained from the investigation will be incorporated into the CSSA Conceptual Site Model (CSM). 

16.2 - Quarterly Groundwater Sampling Requirements

Under this task order, a total of three rounds of quarterly groundwater sampling will occur between September 2003 and June 2004.  By the end of the TO 0008 period of performance, a total of 79 wells will have been incorporated into the quarterly monitoring program.  Table 16.3 indicates the number of wells and sampling parameters to be funded under this contract.

Sampling of the wells will be based on AFCEE Handbook procedures with exceptions as appropriate for the hydrogeology at the site.  The wells will be purged in accordance with low-flow sampling techniques.  The staff will follow the methods approved in the project’s QAPP and the SAP.  QA/QC sampling and analysis will be performed to meet the requirements in the CSSA QAPP.  The purge water will be containerized and transported for treatment by a GAC treatment system (set up under RL74) prior to discharge at CSSA’s Outfall 002.

16.3 - Analytical Validation and Verification

The analytical validation and verification task includes issues related to analytical data, including audit of the laboratories, oversight of sample collection and submittal efforts, interaction with the selected laboratory, data verification, data validation, and management of electronic analytical data.

The laboratory audit will review the specific analytical methods associated with this project, as well as the overall quality systems utilized by the laboratory.  The ability of the laboratory to comply with requirements specified in the AFCEE QAPP and project DQOs will be emphasized.  All major and minor audit findings will be documented in an audit report.  The laboratory will be required to submit its response and proposed corrective actions for review and approval by AFCEE, CSSA, and Parsons. 

Table 16.3 - Sample Quantities and Analytical Parameters

Parsons will oversee each sampling event, including reviewing each Chain-of-Custody (COC) for accuracy and completeness, verifying that the laboratory sample log-in sheets match the COC forms, addressing any sample receipt issues (such as broken sample containers), and maintaining continuous contact with the laboratory regarding scheduling.

Laboratory data packages as specified by percentage in the SOW will be reviewed by Parsons for completeness and adherence to the CSSA QAPP and the approved laboratory variances.  All associated analytical QC data will be examined, and all exceptions will be noted in both the case narrative and data verification report (DVR).  The sample results associated with noncompliant QC performance will be qualified in accordance with the CSSA QAPP.  The deliverable will be submitted in accordance with CDRL A041.

Following verification of the laboratory data, the data usability as related to the project DQOs will be assessed.  Validation will include examination of historical data (if available), laboratory data trends, and the reasons for data collection.  Based on the overall assessment of the data, flags may be removed or changed to reflect usability of the data.  The basis for such changes will be detailed in the project summary report.

Electronic data submitted by the laboratories will be loaded into the CSSA GIS database, verified for accuracy, and updated to reflect all data qualifier changes incurred through the data verification and validation process.  The data are to be supplied in ERPIMS compliant format.

16.4 - information management systems

The Information Management Systems (IMS) task includes data management, database/GIS software programming, reporting and technical support for CSSA’s computer network.  An Information Technology specialist from the Parsons Austin office will provide technical support for CSSA’s GIS on an as-needed basis.

Database and GIS programming will include development and/or modification of software to provide a repository for storage of site-specific data generated daily from field activities.  This will allow daily electronic field collected data to be readily accessible by other team members.

16.5 - effluent re-use feasibility study

For the purpose of reusing treated effluent from the wastewater treatment plant for landscape irrigation, an effluent re-use feasibility study will be performed.  Feasibility will be determined in two main tasks.  The first will define regulatory and permit restrictions and/or requirements related to use of reclaimed wastewater, as well as identifying the main components (pumps, tanks, pipelines, controllers, etc.) required for the reuse system.  Restrictions and requirements will be defined through a review of the CSSA wastewater discharge permit and State of Texas regulations as applicable that govern management and use of reclaimed water (potentially 30 TAC 210, 30 TAC 285, and/or 30 TAC 305, etc.).  As the restrictions and requirements are identified, options for the major system components will be identified and evaluated.  Key considerations will be waste of operation, compatibility with CSSA systems and equipment, and availability of vendor package system.  A preliminary cost estimate will be developed, which will be an important consideration in determining feasibility of effluent reuse.  The basic configuration of the reuse system will be established in this task.

The second task will consist of taking the basic system configuration selected in the first task, and developing it in more detail.  This will include establishing the details for implementation.  It is anticipated that the reuse system will include a pump installed at the end of the wastewater treatment plant that will pump treated effluent to a holding tank.  Another pump will then draw water from the tank, and supply pressurized water to the irrigation system.  Control system(s) will be required to operate the pumps, and will need to account for water levels in tanks and sumps, as well as weather conditions.  The end result of this task will be a cost estimate, and sketches, drawings, and specifications that will be sufficient for installation of the reuse system.  Only equipment that is consistent with future CSSA SCADA plans will be selected.  The SSR will be submitted providing the results of these investigations. 

16.6 - Reporting Procedures

Three quarterly groundwater reports will be prepared and submitted to document the findings of contaminant concentration and delineation.  The hydrogeologic CSM will be updated with cross sections and associated hydrogeologic diagrams will utilize existing and new data generated from the TO 0008 groundwater monitoring. 

16.6.1   Conceptual Site Model Technical Report (Update)

Funds from this delivery order will be used to update the CSM already in progress.  The CSM evaluates available hydrogeologic data concerning the aquifer system under CSSA.  The CSM will be used to prepare the framework for future basewide numeric groundwater modeling.  For this analysis, the specific study area boundaries (a watershed boundary for example) will be established relative to CSSA property, offsite boundary conditions (pumping wells), areas of recharge/discharge (creeks and springs), and major fault and fracture systems.  The CSM will be developed to assist in describing groundwater flow patterns and contaminant migration. 

Specifically, the CSM update will involve the following work elements:

The updated CSM will provide the basic framework and assumptions for future numerical modeling efforts.  The deliverables package will consist of updates to the draft and final versions of the CSM report currently under contract.  Following a comment/response period after the draft issue of the report, the final document will be incorporated into the CSSA Environmental Encyclopedia.

16.6.2   Quarterly Groundwater Reports

All results from these rounds of groundwater sampling will be included in the quarterly groundwater reports.  Data entered into ERP Tools will be submitted in the items of interest report as required by ERPIMS.  All reports will be prepared as both draft and final versions, with one round of government comments before issuance of the final reports.

16.6.3   Report Distribution

From the field efforts covered in this work plan, eight reports will be submitted in draft and final versions.  The reports include a technical report detailing an update to the existing CSM, three quarterly on-post groundwater reports, three quarterly off-post groundwater reports, and the SSR.  The Site Survey Report will be prepared in order to determine the feasibility of installing an irrigation system for re-use of Outfall 001 effluents for irrigation purposes.  The SSR will include a detailed conceptual design, materials listing, and a Rough Order of Magnitude (ROM) cost estimate.  In addition, all analytical reports produced as part of the groundwater monitoring will be submitted in accordance with CDRL A001C.  The project deliverables will be prepared and submitted to the following entities as given in Table 16.5.

16.7 - Schedule

Quarterly groundwater events will be performed from September 2003 through June 2004 under TO 0008. 

Table 16.5 - Project Deliverables and Distribution List for Quarterly Groundwater Technical Reports

All hard copy deliverables will be submitted on recycled content paper and printed double sided unless otherwise specified by the Air Force.  All deliverables will be provided to CSSA and AFCEE according to format, content, and schedule as described below. 

Figure 16.2 provides a tentative timeline for the progression of work.  With the current scope of work, quarterly groundwater reporting will be completed by June 2004.  The schedule will be maintained and updated, and routine submittals will be included in the quarterly man-hours and performance and cost expenditure reports.

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