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- - Wright <br /> Environmental <br /> � Z <br /> Services; Inc. <br /> Construction • Engine r ('•Remediation <br /> \11 "Z <br /> i <br /> April 19, 2004 � <br /> Project No. 4891-01-QM QR � 6 2p0 <br /> M&M Builders Supply V�� ` t v� N <br /> P. O.Box 1107 E�PER�tI\ SSE <br /> Tracy, CA 95378-1107 <br /> Attn. Mr. Shawn Kelly <br /> Re:' Quarterly Groundwater Monitoring Report M&M Builders, 8111 West 11th <br /> Street,Tracy, CA; PHS EHD Site Code 1530 <br /> i <br /> Dear Mr. Kelly, <br /> i <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 Environmental <br /> Health Division(SJC EHD). <br /> The SJC EHD approved a reduction of monitoring well sampling in their letter dated <br /> May J 5, 2003. The sampling for the first quarter 2.004 is for well MW-3 only. <br /> F 3 <br /> Field Methods a <br /> Groundwater Monitoring Well Samnlin } <br /> The well was sampled on March 8, 2004. The 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 poured <br /> into;the appropriate laboratory prepared container with minimum cavitation. Each water <br /> sample was labeled, logged onto a chain-of-custody form, and placed in a chilled ice chest. <br /> Upon completion of well sampling,.the well was closed and locked. <br /> i <br /> zy i. <br /> 67 E. 10th Street . Tracy,CA 95376 <br /> 209.833.0758 • Fax 209.832.5152 <br /> wright@inreach.com Lie. #651501 A-B HaWat, C21 Page 1 <br /> websit http://wrightenvirol.imentalservices.com <br />