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0 The EMP report will be accompanied by tabulated groundwater chemistry data and figures illustrating the locations of the existing and new groundwater monitoring wells, groundwater equipotential contours, and isoconcentration contours. The EMP report will be supported by appendices that contain the monitoring well permits, geologic logs, well construction logs, well development field data, groundwater sampling field data, chain -of - custody documentation, certified laboratory reports, aquifer testing graphical output, and Biochlor modeling output. The final report will be signed by a California Professional Geologist. The report will be submitted first in draft form for County review, then in final form after integration of County comments and edits. If the final draft is acceptable to the County, it will be forwarded to the RWQCB for their review and comment, before it becomes finalized for signature and is stamped. Prior to submittal of any work product to County, GLA will provide comprehensive senior peer review of all deliverable technical documents. 14 2011-0115 CHSL EMP Workplan Geo -Logic Associates Revision 1- August 24, 2011 To evaluate groundwater flow conditions, groundwater equipotential surface data will be calculated for all perched, shallow aquifer wells using surveyed top -of -casing elevations and depth to water measurements so that equipotential contours can be developed and groundwater flow directions and gradients can be calculated. Hydraulic conductivity estimations from bail down and recovery tests will be used, along with the hydraulic gradients, to estimate groundwater flow velocities in the perched aquifer. The results will be presented on a groundwater contour map encompassing the existing site and the new monitoring wells. Groundwater flow and chemistry data will be used to construct simple numerical models employing the U.S. EPA's Biochlor and Bioscreen programs to simulate transport of contaminants, and various graphical methods will be used to evaluate the fate of chlorinated aliphatic compounds using site-specific data to assess naturally -occurring reductive dechlorination processes in the perched aquifer. The results of this analysis are expected to support development of an Engineering Feasibility Study for Corrective Action. The EMP report will be prepared to summarize the methods and results of the field and laboratory investigations. It will build on the groundwater monitoring well installation report (Section 3.4), including all of the information contained therein, as well as the following: • Aquifer test field methods, methods of data analysis, and results • Groundwater sampling methods • Soil and liquid waste management • Groundwater elevations, flow directions, gradients and velocities • Groundwater chemistry data evaluation • Assessment of migration pathways and fate of VOC impacts The EMP report will be accompanied by tabulated groundwater chemistry data and figures illustrating the locations of the existing and new groundwater monitoring wells, groundwater equipotential contours, and isoconcentration contours. The EMP report will be supported by appendices that contain the monitoring well permits, geologic logs, well construction logs, well development field data, groundwater sampling field data, chain -of - custody documentation, certified laboratory reports, aquifer testing graphical output, and Biochlor modeling output. The final report will be signed by a California Professional Geologist. The report will be submitted first in draft form for County review, then in final form after integration of County comments and edits. If the final draft is acceptable to the County, it will be forwarded to the RWQCB for their review and comment, before it becomes finalized for signature and is stamped. Prior to submittal of any work product to County, GLA will provide comprehensive senior peer review of all deliverable technical documents. 14 2011-0115 CHSL EMP Workplan Geo -Logic Associates Revision 1- August 24, 2011