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Jam` <br /> 3164 Gold Camp Drive <br /> DeltaAA !t Suite 200 <br /> 1////Ahk <br /> Environm ' N,1+ Cordova,CA 95670 <br /> �3! 32 916/38 2085 <br /> Consultants,Inc. FAX:916/638-8385 <br /> November 22, 1995 <br /> Mr. Ron Rowe <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber <br /> Stockton, California 95201 <br /> Subject: Well Box Locations <br /> Unocal Service Station No. 5886 <br /> 2701 W. March Lane <br /> Stockton, California <br /> Dear Mr. Rowe: <br /> At the request of Unocal, Delta Environmental Consultants (Delta) is providing San Joaquin County <br /> Public Health Services Environmental Health Division(SJCPHSEHD)a site map showing the locations <br /> of two proposed well boxes to be installed at the site. These well boxes will be installed prior to <br /> asphalting the site to minimize disruption of services and damage to the newly capped surface. Also <br /> attached,are three figures showing the analytical results (total petroleum hydrocarbons as gasoline and <br /> diesel and benzene)for ground water samples collected from the Geoprobe borings installed at the site. <br /> An additional well is proposed south of GP-21 in the driveway. This location,however is not scheduled <br /> to be resurfaced and does not require a well box at this time. <br /> Delta has proposed to install 24-inch square boxes to allow the future installation of ground water <br /> monitoring wells following the resurfacing of the site. The well box locations are based on the <br /> Geoprobe ground water sample results, the inferred direction of ground water flow at the site, <br /> (northeast) and site conditions (dispenser canopy and underground storage tanks). <br /> It is Delta's understanding that Unocal's subcontractor has scheduled the resurfacing for December 4, <br /> 1995 and final grading for November 29 and 30, 1995. In order to meet these deadlines, Delta would <br /> like to deliver and install the well boxes on November 28 or 29, 1995 following concurrence of the <br /> locations with SJCPHSEHD. <br /> If you have any questions regarding the proposed work or schedule, please call me at (916) 638-2085. <br /> Sincerely, <br /> DELTA ENVIRONM%IENTAL_90NSULTANTS9 INC. <br /> Eric J. Holm, R.G. <br /> California Registered Geologist No. 5880 <br /> Providing a Competitive Edge <br />