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Wl SI ERV Grot. ocic Ri SOURC l S , INC <br /> 2u,9 I I R 1'r'{15[0 BOULMRIA I B <br /> ti 1/457 73 1 ( NIPA 41}1437 8511 RECEIVED <br /> 4lil-ii7 7�95 f•�X d151d�7 SSZI <br /> i MAY 10 1990 <br /> ENVIRONMENTAL HEALTH 9 May 1990 <br /> PERMIT/SERVICES <br /> EMM Ms Eleanor Ratliff <br /> San Joaquin Local Health District <br /> 1(01 East Hazelton Avenue <br /> .r <br /> Stockton, California 95205 <br /> Re Workplan <br /> Monitoring Well installation <br /> T <br /> Apache Plastics, Inc <br /> Stockton, California <br />' WGR Project #6-060 03 <br />'y;y TS <br /> Dear Ms Ratliff <br /> gal WLstern Geologic Resources, Inc (WGR) has been retained by Apache Plastics, Inc to conduct a <br /> second phase subsurface investigation at the ApachL Plastics Inc (API) facility located at 2050 East <br /> Uu Fremont Street,Stockton, California (Figure 1 of Attachment A) This phase of work includLs drilling <br /> RM 3 soil borings for soil sampling, completing the borings as 2-inch diamLter monitor wells, developing the ,+ <br /> new wells,purging and collecting groundwater samples for chemical analysis,surveying thL top-of-casing 1 <br /> Llevations, and producing a potentiometric surface map based on dLpth-to-water measurements ThL <br /> 1 purpose of the work is to better define the vertical and horvontal extent of fuel hydrocarbons in the soil <br /> and groundwater beneath the site and ImmediatLly west of the, sill AS rLqucstcd, wL havL prepared <br /> the following work plan for your review <br /> SITE DESCRIPTION <br /> The relatively flat site is located on the east side, of Stockton in a mixed industrial and residLritial area <br /> The properly borders Miner Avenue to the south, Port Stockton foods to the west, Kelvard <br /> Refrigeration to the east and businesses and residences to the north API manufacturers extruded <br /> plastic pipe at this facility <br /> BACKGROUND <br /> In August 1988, a 1000-gallon underground gasoline tank was rc movLd from the north Sidi., of the APF <br /> warLhouse by Precision Industries of Stockton, California (Figure 2 of Attachment A) A soil sample <br /> collected from native soil beneath the, backfill material contained 3,400 parts-Ir4'i-III,ih[IIi (ppm) total <br /> pLtroleum hydrocarbons and benzene, toluene, elhylbenrene, and total xylenes (BTEX) at fit ppm, <br /> 290 ppm, 65 ppm, and 610 ppm, respectively <br /> In August and SLptember 1989, WGR drilled four soil borings B-1 through B-4, and completed the <br /> borings as groundwater monitor wells, MW-1 through MW-4, rLspectively The locations of the four <br /> T4� <br /> L <br />