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k" KLEINFELDER <br /> An employee owned company <br /> File No C20443901 E04 DMEWED <br /> August 22, 2002 <br /> AUG 2 6 2002 <br /> Ms Jan Thompson <br /> E <br /> Wilbur-Ellis Company ENVIRONMENTHEALTH <br /> PERMIT/SERVICES <br /> Agricultural Services Corporate Office <br /> P O Box 1286 <br /> Fresno, CA 93715 <br /> SUBJECT: Report <br /> 1s` Semi-Annual 2002 Groundwater Sampling <br /> Former Underground Storage Tank Site <br /> H&H Engineering and Construction,Inc. <br /> 212 Industrial Drive <br /> Stockton, CA 95206 <br /> Dear Ms Thompson <br /> In accordance with your request and authorization, Kleinfelder has performed the I" semi-annual <br /> • 2002 groundwater monitoring event at the above-referenced project site The semi-annual <br /> groundwater monitoring was required by the San Joaquin County Public Health Services, <br /> Environmental Health Division (PHS/EHD) <br /> 10 BACKGROUND <br /> The following information was obtained from excerpts of previous soil and groundwater <br /> assessment reports prepared by Krazan & Associates, Inc , a summary chronology of the site <br /> events, and correspondence from the San Joaquin County Public Health Services Department <br /> Environmental Health Division (PHS/EHD) provided to Kleinfelder by Wilbur-Ellis <br /> In 1965, Wilbur-Ellis Company installed a 1,000-gallon underground gasoline storage tank <br /> (UST) at the site In 1987, the UST and associated piping were removed Low levels of total <br /> petroleum hydrocarbons as gasoline (TPH-G) were detected in soil samples collected at the time <br /> of removal Affected soil was excavated and aerated The former UST location was backfilled <br /> In 1993, Wilbur-Ellis sold the property to H & H Engineering and Construction, Inc In 1997, H <br /> & H applied for refinancing of a loan Since no closure letter for the former UST was on file at <br /> the San Joaquin County PHS/EHD, the bank required a subsurface assessment to be conducted <br /> H & H retained Krazan & Associates to perform the subsurface assessment A soil assessment <br /> conducted in February 1998 found low levels of TPH-G and benzene, toluene, ethylbenzene, <br /> • xylene (BTEX) compounds in the soil Petroleum hydrocarbons were found in subsequent <br /> groundwater sampling conducted in March 1998 Additional soil and groundwater sampling, <br /> 20-4439-01 E04/ST02R397 Page 1 of 6 <br /> Copyright 2002, Kleinfelder, Inc August 22,2002 <br /> KLEIi,1FFLDER 2825 East Myrtle Street Stockton, CA 95205-4794 (209) 948-1345 (209)948-0621 fax <br />