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Wright [C D)) � 1 <br /> Environmental <br /> Services, Inc. AUG <br /> 0 3 2004 <br /> Construction Engineering • Remediation ENVIRONMENT <br /> PER��IT HEALTH <br /> July 16,2004 ISERVICES <br /> Project No.4891-01-QM <br /> M & M Builders Supply <br /> P. O. Box I IM <br /> Tracy,CA 95378-1107 <br /> Attn.: Mr. Shawn Kelly <br /> Re:i Quarterly Groundwater Monitoring Report, M&M Builders, 8111 West <br /> 11th Street,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 Eleventh <br /> Street, Tracy, California (see Figure 1). The purpose of this work is to provide quarterly <br /> groundwater monitoring as required by the San Joaquin County Environmental Health <br /> Division (SJC EHD). The sampling for the second quarter 2004 is for well MW-3 only; <br /> water levels were measured in all wells. <br /> Field Methods <br /> ('groundwater Monitoring Well Sampling <br /> The wells were sampled on June 25, 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 removed, <br /> measurements of pH, electrical conductivity and temperature were taken until these <br /> parameters stabilize, which is interpreted to be aquifer water entering the casing. The well <br /> was allowed to recover to 80% of the initially measured water level, and then samples were <br /> collected. The sample was carefully collected with a clean bailer and poured into the <br /> appropriate laboratory prepared container with minimum cavitation. Each water sample was <br /> labeled, logged onto a chain-of-custody form, and placed in a chilled ice chest. Upon <br /> completion of well sampling,the well was closed and locked. <br /> Table 1. Groundwater Well Water Levels,June 2004 <br /> Date Depth to Well Casing Groundwater Comments <br /> Measured Water(ft) Depth(ft) Elevation(ms1 Elev.(ft) <br /> ft <br /> MW-1 6125104 7.80 20.97 45.09 37.29 None <br /> MW-2 6125/04 7.22 25.05 45.41 1 38.19 None <br /> MW-3 6125/04 7.29 24.81 46.01 1 38.72 None <br /> 67 E. 10th Street ♦ Tracy,CA 95376 Page 1 of 4 <br /> 209.833.0758 ♦ Fax 209.832.5152 <br /> wright@inreach.com Lic. #651501 A-B HazMat <br /> websit http://`home.inreach.comAvright <br />