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GROUND ZERO ANALYSIS, INC <br /> Cf 7 <br /> 1714 AWn,Street <br /> IC L/ <br /> Esmion,California 95320-1927 <br /> Telephone: (209)838-9888 <br /> Facsimile:(209)838-9983 <br /> Is <br /> October 19, 1999 <br /> Mr. Harlan Knoll <br /> San Joaquin County Public Health Services !I <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Subsurface Investigation Summary Report <br /> Sunnyside Produce, 8960 West Walnut Grove Rd, Thornton California <br /> Dear Mr. Knoll: <br /> Ground Zero Analysis, Inc. (Ground Zero)submits this Surr mary Report on behalf of Sunnyside Produce to' <br /> summarize the subsurface investigation activities conducted 4t the subject property(Figure 1). <br /> 1.0 INTRODUCTION <br /> 1.1 Purpose <br /> The purpose of the investigation was to delineate the vertical and lateral extent of soil and groundwater <br /> contamination associated with the underground storage tanks(USTs)formerly located at the facility. II <br /> li <br /> 1.2 Limitations if <br /> This assessment was performed utilizing methods and prDeedures consistent with good commercial or: <br /> "T <br /> customary practices designed to conform to acceptable industry standar The independent conclusions' <br /> represent Ground Zero's best professional judgement bused on the conditions that existed and the <br /> information and data available to us during the course of this assignment. Factual information regarding' <br /> operations, conditions, and test data provided by Sunnyside Produce have been assumed to be correct and <br /> complete. <br /> 1.3 Resources <br /> Scan Garvey, a Ground Zero geologist, directed field work on July 28 and July 30 1999. Mr. Garvey <br /> supervised the drilling of nine soil borings at the site, five of which were drilled using the direct push drilling <br /> method, and four of which were drilled using a hand auger. Fisch Environmental (Fisch), a State licensed <br /> —drilling company (C57-683685), advanced the direct push borings, and Anthony Scoma, a Ground Zero <br /> —technician advanced the hand auger borings. Argon Labor-,lories, Inc. (Argon), a California state-certified! <br /> —hazardous waste testing laboratory(ELAP 2359),completed the laboratory analyses for all samples. <br /> manscr2\surnmary.doc ii <br />