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A S S O C I A T E S I N C . <br /> Following soil and groundwater sample collection, the borings will be backfilled with neat cement <br /> grout to the ground surface. All drill cuttings, if any, will be removed from the site in a 5-gallon <br /> container and will be disposed of properly pending laboratory results. <br /> Sample Analysis <br /> Selected samples will be immediately placed on ice and delivered under chain-of-custody <br /> documentation to Argon Laboratories Inc., a State-certified laboratory, for analysis. Soil and <br /> groundwater samples will be analyzed for total petroleum hydrocarbons as gasoline (TPHg) by <br /> EPA method 8015 modified; benzene, toluene, ethylbenzene, and xylenes (BTEX) by EPA <br /> Method 8020; and methyl tertiary butyl ether (MTBE), tertiary butyl ether (TBA), tertiary amyl <br /> ether (TAME), di-isopropyl ether (DIPE), and ethyl tertiary butyl ether (ETBE) by EPA Method <br /> 8260. <br /> Well Survey <br /> ATC will perform a well survey for the site. ATC will review Department of Water Resources <br /> (DWR) groundwater well construction logs and City of Ripon files to identify any groundwater <br /> wells located within 2,000-foot radius of the site. ATC will also visually inspect adjacent <br /> properties for any groundwater wells or other potential receptors. Any wells discovered during <br /> the well survey will be plotted onto a site vicinity map and construction details for the wells, if <br /> available, will be included in the summary report. <br /> Preparation of Subsurface Investigation Report <br /> A subsurface investigation report will be prepared and describe the extent of the impacted soil and <br /> groundwater. The subsurface investigation report will be prepared in accordance with California <br /> Regional Water Quality Control Board and PHS/EHD reporting guidelines and will also include <br /> the second quarter 2001 monitoring event results. <br /> All work described in this workplan will be performed under the direction of a California <br /> Registered Professional Engineer. All field work will be completed in accordance with ATC's <br /> Site Safety Plan (SSP) and Quality Control/Quality Assurance Plan on file with PHS/EHD. <br /> Proiected Schedule <br /> Once approval of this workplan has been received, ATC will obtain State Cleanup Fund pre- <br /> approval and schedule drilling activities. It is anticipated the drilling will be completed in two <br /> days. ATC will notify PHS/EHD at least 48 hours prior to beginning any field activities. The <br /> summary report will be submitted to PHS/EHD approximately four to five weeks after the <br /> completion of field activities. <br /> w:\14981\reports\wkp3.doc 4 <br />