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1'reloksmalINC. <br /> July 23, 1997 <br /> EIVVIRp �. <br /> Mr. Steve Sasson, R.E.H.S. p04 E• Web E/V AL Nve 'rh SA <br /> San Joaquin County Public Health Services, �gppro8 der AD�kto r�CFloor IVI�IpN <br /> Environmental Health Division Denied A 95201-03g <br /> 304 East Weber Avenue, Third Floor Congitior)s Q <br /> P.O. Box 388 'Date <br /> Stockton, California 95201-0388 <br /> by <br /> Reference: Revised Workplan for Subsurface Investigation at the Bank of e <br /> No. 0852 Located at 234 West Main Street in Ripon, California. <br /> Versar Project No. 3622-500 <br /> Dear Mr. Sasson: <br /> Versar, Inc. (Versar), on behalf of Bank of America, has been conducting an <br /> environmental investigation at the Bank of America Branch No. 0852 located at 234 West Main <br /> Street in Ripon, California(Site). The Site location and Site layout are shown in Figures 1 and 2, <br /> included in Attachment I, respectively. This revised workplan replaces the workplan submitted <br /> with permit application dated July 10, 1997 and approved by you on July 14, 1997. <br /> Versar proposes drilling five boreholes at the locations shown in Figure 2. Three of the <br /> boreholes will be placed in the nearest accessible area to the auto repair facilities formerly <br /> located at the Site. The locations of the former auto repair building is shown on the Sanborn Fire <br /> Insurance Map included in Attachment II. Because of the presence of a former dry cleaning <br /> facility across the street to the north of the Site, Versar proposes to place two of the boreholes in <br /> a position between the former auto repair facility and the former dry cleaner to assess whether <br /> the offsite former dry cleaning facility has impacted groundwater beneath the Site. The location <br /> of these wells is upgradient from the Site. <br /> Assuming the upper 18 inches of soil at the Site has been disturbed by development, one <br /> soil sample from each borehole will be collected at a depth of approximately two feet below <br /> ground surface (bgs), or at one foot below encountered aggregate baserock. The boreholes will <br /> be drilled using small truck-mounted Geoprobe® soil coring and sampling equipment. One soil <br /> sample from each of the three boreholes will be submitted to a California certified laboratory for <br /> volatile organic compounds (VOC) analysis by Environmental Protection Agency (EPA) Method <br /> 8240. <br /> HAPROJECTS\BOFA\MPON.RE V <br /> • SACRAMENTO OFFICE • <br /> 7844 MADISON AVENUE,SUITE 167•FAIR OAKS,CALIFORNIA 95628•TELEPHONE:(916)962-1612 FAX:(916)962-2678 <br />