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p <br /> CLEARWATER <br /> . G R O U P, I N C <br /> Environmental Services <br /> Ms Mary Meays June 27, 1997 <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue <br /> Stockton, California 95202 <br /> Re: Addendum to Workplan for Site Investigation PAYMENT <br /> Barnes Trucking Facility RECEIVED <br /> 1817 South Fresno Avenue JUL 0 9 1997 <br /> Stockton, California <br /> SAN JOAQUIN COU11 Y <br /> PUBLIC HEALTH SERVICES <br /> c Dear Ms Meays, ENVIRONMENTAL HEALTH DIVISION <br /> This workplan addendum is submitted by Clearwater Group, Inc (Clearwater) <br /> on behalf of Barnes Trucking The Barnes Trucking Facility is located south <br /> of State Highway 4 at 1817 South Fresno Avenue (Figure 1) <br /> In a letter dated May 16, 1997, the San Joaquin County Public Health Services <br /> Environmental Health Division (EHD) responded to Clearwater's Workplan <br /> for Site Investigation, dated April 21, 1997 In that letter, and during a <br /> conversation with you on May 28, 1997, you requested the following <br /> modifications to the workplan <br /> • Submittal of a site map drawn to scale, so that the monitoring wells are <br /> not placed toc far from the former tank pit <br /> • The addition of three soul borings to be drilled in the area of the former <br /> tank pit and fuel dispensers <br /> The attached Figures 2 and 3 are a site plan and a map showing the proposed <br /> drilling locations, respectively Because the direction of groundwater flow is <br /> unknown at this site, the wells should be placed far enough apart to <br /> triangulate the data and to obtain a reliable estimate of the groundwater <br /> gradient and flow direction These three proposed well locations are 60 to 80 <br /> feet apart The proposed location of well MW-3 has been moved to the west <br /> side of the office building in order to place it closer to the former tank basin <br /> Proposed locations of soil borings SB-1, SB-2, and SB-3 have been added to the <br /> scope of work We propose the following sampling and analyses plan for <br /> • these borings <br /> 520 Third Street,Suite 104 o Oakland,California 94607 o Telephone 510-893-5160 o Fax 510-893-5947 <br />