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Wright <br /> Environmental nl vlE EWE <br /> . Services, Inc. Ln <br /> Construction • Engineering • Remediation <br /> AUG 0 5 2003 <br /> July 28, 2002 ENVIRONMENT HEALTH <br /> Project No 4233-3 <br /> PERMIT/SERVICES <br /> Trust of Mary Gardella <br /> C/o Ms Winiferd Alexander <br /> P O Box 968 <br /> Capitola, CA 95010 <br /> Re: Quarterly Groundwater Monitoring Report <br /> Former Stefano's Gas Station, 1419 East Charter Way <br /> Stockton, CA; PHS EHD Site Code 1530 <br /> Dear Ms Alexander, <br /> Wright Environmental Services, Inc (Wright) has prepared the Quarterly Groundwater <br /> Monitoring Report at the above referenced site located at 1419 East Charter Way, <br /> Stockton, California (see Figure 1) The purpose of this work is to provide quarterly <br /> groundwater monitoring as required by the San Joaquin County Public Health Services <br /> Environmental Health Division (PHS EHD) <br /> Field Methods <br /> Groundwater Monitoring Well Sam lui <br /> The wells were sampled on June 6, 2003 Each monitoring well was purged using <br /> calculated well volumes based upon the depth to water in each casing Depth to <br /> groundwater measurements were made to the nearest one-one hundredth of one foot, and <br /> also checked for the presence of separate please product As each purge volume is <br /> removed, measurements of pH, electrical conductivity and temperature were taken until <br /> these parameters stabilize, which is interpreted to be aquifer water entering the casing <br /> The well was allowed to recover to 80% of the initially measured water level, and then <br /> samples were collected The sample was carefully collected with a clean bailer and poured <br /> into the appropriate laboratory prepared container with minimum cavitation. <br /> Each water sample was labeled, logged onto a chain-of-custody form, and placed in a <br /> chilled ice chest Upon completion of well sampling, the well was closed and locked and <br /> the sampler moved to the next well <br /> 67 E 10th Street e Tracy,CA 95376 <br /> 209 833 0758 e Fax 209 832 5152 <br /> wright@inreach com Lic ##651501 A-B HazMat C27 �Oft, <br /> webs►t http//wrrghtenvtronmentalservices com Page I �M�► <br />