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Wright <br /> Environmental <br /> Services, Inc. <br /> Construction ♦ Engineering ♦ Remediation <br /> May 6, 2002 UlI���Q V �� <br /> Project No. 4891-01-QM " v <br /> M& M Builders Supply MAY 2 9 Zoon <br /> P.O. Box 1107 ENVIRONMENT HEALTH <br /> Tracy, CA 95378-1107 PERMIT/SERVICES <br /> Attn.: Mr. Shawn Kelly <br /> Re: Quarterly Groundwater Monitoring Report <br /> M&M Builders, 8111 West 11th Street, <br /> Tracy, CA; PHS EHD Site Code 1530 <br /> Dear Mr. Kelly, <br /> Wright Environmental Services, Inc. (Wright) has completed the work for the Quarterly <br /> Groundwater Monitoring Report at the above referenced site located at 8111 West <br /> Eleventh Street, Tracy, California (see Figure 1). The purpose of this work is to provide <br /> quarterly groundwater monitoring as required by the San Joaquin County Public Health <br /> Services Environmental Health Division (PHS EHD). <br /> Field Methods <br /> Groundwater Monitoring Well Sampling <br /> The wells were sampled on March 21, 2002. 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 phase 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 <br /> poured 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 Tracy,CA 95376 <br /> 209.833.0758 o Fax 209.832.5 i 52 <br /> wright@inreach.com Lic. #651501 a-_R Ha_:{fat ngoo <br />