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F Analyte Test Method Bicarbonate SM 23208 Carbonate SM 2320B Chloride 300.0 Nitrate as Nitrogen 300.0 Sulfate 300.0 Total Dissolved Solids 160.1 Calcium 6010B Magnesium 6010B Potassium 6010B Sodium 60108 In accordance with GLA's QA/QC protocols, when laboratory analytical reports are received, they are date-stamped and reviewed by responsible staff for completeness and conformance with holding time requirements. All data is also reviewed for accuracy and consistency with historical values, if appropriate. 3.5 MONITORING WELL INSTALLATION REPORT As required in the July 7, 2011, Order from the RWQCB, a groundwater monitoring well installation report will be submitted by December 15, 2011. The report will describe the field work, including drilling, sampling, logging, well construction, well survey, and well development methodologies, final rationale for monitoring well siting, total depths, and screened intervals, and a summary of geologic and hydrogeologic findings. The report will include copies of the final well permit documents, drafted geologic logs of each borehole, drafted well construction logs, and well development data. Proposed additional well locations will be identified, if VOCs are found in any well. 3.6 EVALUATION MONITORING PROGRAM REPORT The EMP report will be prepared to summarize all field work, results of laboratory analyses, and data analysis and interpretations culminating in an assessment of the nature and extent of the release from the CHSL. The EMP report will also address any new understanding of the groundwater flow system in the shallow, perched aquifer. Existing and new analytical data will be reviewed to characterize the nature of groundwater release in the perched, shallow aquifer at the CHSL. GLA will evaluate historical groundwater chemistry data for samples from wells MW -5 and MW -8 to assess trends in VOC concentrations as they pertain to seasonal influences (precipitation events preceding microbial degradation of wastes and subsequent increases in VOCs), breakdown of primary VOCs and formation of daughter products, and responses to existing corrective actions. Groundwater chemistry data from existing monitoring wells and the new EMP wells will be used to construct isoconcentration contours of principal VOCs and the total VOC load to illustrate the distribution of VOCs in the perched aquifer and to estimate the extent of VOCs. 13 2011-0115 CHSL EMP Workplan Geo -Logic Associates Revision 1- August 24, 2011