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Environr`�ttental N%001 <br /> Science & <br /> Engineering,Inc. <br /> A CILCORP Conpany RECEIVED <br /> January 21, 1993 JAN 2 6 1993 <br /> ENVIRONMENTAL HEALTH <br /> Project 6-92-5400 PERMIT/SERVICES <br /> Cecchini, Cecchini, and Giovannoni <br /> c/o Mr. Ellis Cecchini <br /> 1312 A Street <br /> Antioch, California 94509 <br /> SUBJECT: Addendum to Stockpile Soil Remediation Workplan, 3437 Newton Road, <br /> Stockton <br /> Dear Mr. Cecchini, <br /> The following is an addendum to a workplan for remediation of stockpiled soil from the <br /> subject site using an ex-situ enhanced bioremediation method. The initial workplan was <br /> issued October 21, 1992. This addendum is in response to comments by the San Joaquin <br /> County Public Health Services dated December 21, 1992. Upon your approval, a copy of <br /> this workplan addendum will be submitted to the San Joaquin County Public Health <br /> Department. <br /> Soil Sampling Event <br /> There has been only one stockpile sampling event to date. On August 5, 1992, <br /> Environmental Science & Engineering, Inc. (ESE) measured and sampled the stockpile at <br /> the request of the site owner. The purpose of the sampling was to determine current <br /> concentrations of hydrocarbons in the soil in order to identify remedial options. <br /> The procedures used in sampling the stockpiled soil was to collect 32 samples at regular <br /> intervals within the stockpile. A shovel was used to dig into the pile to a minimum of one <br /> foot for the purpose of obtaining a representative sample. Figure A shows the location of <br /> the Thomas Yard and Figure B details the stockpile sampling locations for the August <br /> sampling event. Soil was sampled using clean, two by six inch brass tubes. The samples <br /> tubes were immediately capped with teflon tape and plastic caps, sealed with duct tape, <br /> labeled, and transported cold under chain of custody to a state certified analytical <br /> laboratory. The laboratory composited every four samples into one for the purpose of <br /> analysis. The requested soil analyses were Extractable Petroleum Hydrocarbons (EPH) as <br /> diesel and Total Volatile Hydrocarbons (TVH) as gasoline using the California DOHS <br /> Methods, and Benzene, Toluene, Ethylbenzene, and Total Xylenes (BTEX) using EPA <br /> method 5030/8020. Analyses for title 26 metals and fish bioassay were also performed on <br /> two samples. <br /> 4090 Nelson Avenue,Suite J Concord,CA 94520 Phone(510)685-4053 Fax 610)685-5323 <br />