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f { <br /> . A S S O C I A T E S I N C <br /> estimated to be approximately 55 feet bgs Once the groundwater and soil samples have been <br /> collected, the borings will be grouted to the surface <br /> The fifth boring will be advanced to a depth of at least 80 feet bgs employing cone penetrating <br /> testing (CPT) methods A cone mounted with sensors at the tip will be advanced into the soil <br /> using direct push rods The sensors will test the response of the soil to the force of the <br /> penetrating cone and this will allow the subsurface stratigraphy to be characterized The boring <br /> will be advanced to at least 80 feet bgs When soil conditions, characterized by the CPT, are <br /> encountered that indicate that the 100-foot sand zone water bearing unit has been encountered, a <br /> discrete groundwater sample wall be withdrawn from the boring at that depth, estimated to be <br /> between 80 and 120 feet bgs <br /> Sample Analysis <br /> The soil and groundwater samples from the soil borings will be immediately placed in a cooler <br /> with ice and delivered under chain-of-custody documentation to a State-certified analytical <br /> laboratory Soil samples will be analyzed for total petroleum hydrocarbons as gasoline (TPHg), <br /> benzene, toluene, ethylbenzene, and xylenes (BTEX) by EPA Methods 8015/8020, and oxygenate <br /> fuel additives by EPA method 8260 <br /> .� <br /> Report Preparation <br /> Upon completion of the subsurface investigation, a summary report will be prepared for submittal <br /> to PHS/EHD The report will include a description of all field activities, laboratory analytical <br /> results, and boring logs as well as data from MCTC concerning wells MW-208 and MW-320 if <br /> any are available <br /> All work described in this workplan will be performed under the direction of a California <br /> Registered Professional Engineer All work will be performed in accordance with ATC's Site <br /> Safety Plan (SSP) and Quality Control/Quality Assurance Plan already on file with PHS/EHD for <br /> this site <br /> Well and Sensitive Receptor Survey <br /> A well and sensitive receptor survey will be included in the summary report <br /> Projected Schedule <br /> Once approval of this workplan has been received, ATC will confirm a schedule for drilling <br /> activities 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 Iwordpro117292117292 011RepoMi\4 q=2000 dw 4 <br />