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Environmental , <br /> Science & <br /> Engineering,Inc. APR 2 .° <br /> A CILCORR Company <br /> ENVIRONMENTAL H+ALTH <br /> April 19, 1993 <br /> ERMI /SERVICES <br /> Project 6-92-5400 <br /> Ms. Diane Hinson <br /> San Joaquin County Department of Environmental Health <br /> 445 N. San Joaquin Ave. <br /> Stockton, CA <br /> i <br /> SUBJECT: Soil Remediation - 3535 E. Cherokee Road, Stockton, CA <br /> Dear Ms. Hinson: <br /> Environmental Science & Engineering, Inc. (ESE), on behalf of Cecchini, Cecchini, and <br /> Giovannoni is submitting this response to San Joaquin County 's (County) concerns related <br /> to the Soil Remediation Workplan and addendum submitted to the County October 26,2993 <br /> and January 21, 1993, respectively. The County's concerns were relayed by Mr. Michael <br /> Infurna to Ms. Susan Wickham of ESE by telephone. <br /> Location of Stockpile: All of the stockpiled soil found at 3437 Newton Road (known as <br /> Thomas Yard) was moved to an adjacent fenced area in October 1992. The stockpile was <br /> moved for the following reasons: <br /> 1) The stockpile was located in an area that caused ponding and prevented drainage <br /> of the site. The stockpile needed to be moved prior to the rainy season. <br /> 2) Analyses performed in August 1992 by ESE (as documented in the <br /> abovementioned workplans)indicated that the soil contained only diesel fuel without <br /> volatiles or excessive metals concentrations. A fish bioassay for the soil reported > <br /> 750 mg/L in a 96 hour LC50, a result interpreted as nontoxic. <br /> 3) A tenant was willing to rent the property as long as the stockpile was moved. <br /> Size of Stockpile: The volume of the current stockpile is estimated at 420 cubic yards based <br /> on current measurements of 64, by 176, averaging 11 1/2" depth (R. Cecchini, personal <br /> communication). ESE believes that the estimated volume of soil in the previous reports are <br /> in error. The previous report stated that 500 cubic yards of soil was excavated in the first <br /> phase of excavation (1989). Upon review of records, it appears that only 100 cubic yards <br /> of soil (plus the tanks), were excavated during the tank removal (Marty Thorpe,Thorpe Oil, <br /> 1989). Approximately 500 cubic yards of soil was excavated by ESE in 1990 based on <br /> stockpile size. To ESE's and the Cecchini's knowledge, no soil was ever removed from the <br /> 4090 Nelson Avenue,Suite J Concord,CA 94520 Phone(510)685-4053 Fax(510)685-5323 01V4 <br />