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� L <br /> . Vol. ., r <br /> 3 ,! <br /> ROUND ZERO ANALYSIS,INC. <br /> G <br /> Jill <br /> 1714 in,Street i <br /> Escalon,California 95320-1927 <br /> Telephone.(209)838-9888 <br /> Facsunile: (209)838'.-9883 <br /> June 2, 1999 <br /> Ms. Carol Oz <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Subsurface Investigation Summary Report <br /> Delta Air Strip <br /> 15971 N. Tracy Blvd., Tracy California <br /> Site Code: 2452 <br /> Dear Ms. Oz: <br /> Ground Zero Analysis, Inc. (Ground Zero) submits this Summary Report on behalf of Haley Flying <br /> Service, Inc. to summarize subsurface investigation activities conducted -at the subject property <br /> (Figure 1). <br /> 1.0 INTRODUCTION <br /> 1.1 Purpose ' <br /> The purpose of the drilling,;workplan was to investigate the vertical and potential lateral extent of <br /> soil contamination and to determine if groundwater has been impacted by an unauthorized release of <br /> aviation fuel from the former underground storage tank(UST) located at the facility. <br /> 1.2 Limitations <br /> This assessment was performed utilizing methods and procedures consistent with good <br /> commercial or customary practices designed to conform to acceptable industry standards. The <br /> independent conclusions represent Ground Zero's best professional judgement based on the <br /> conditions that;existed and the information and data available to us during the course of this <br /> assignment. Factual information regarding operations, conditions, and test data provided by <br /> { Haley Flying Service, Inc, have been assumed to be correct and complete. <br /> i' <br /> datalgroundzelhaleylsummary.doc <br />