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Shaw Environmental, Inc. <br />Shaw Project No. 130263.25December 17, 2008 <br />Subject: <br />Dear Mr. Vasquez:i <br />Shaw Environmental, Inc. (Shaw) is pleased to present this report detailing completion of the <br />initial water well sampling at the two above-mentioned AT&T facilities. In addition, Shaw <br />arranged for backflow testing of the well at the East Eight Mile Road facility. These activities <br />were performed to correct issues noted in two Notices of Violation (NOVs) issued on March 31, <br />2008 by the County of San Joaquin Environmental Health Department (CSJEHD). The <br />following sections describes the water well sampling and backflow testing activities. <br />Mr. Bob Vasquez <br />AT&T Environment, Health and Safety <br />3707 Kings Way, Room B-15 <br />Sacramento, California 95821 <br />Letter Report for Water Well Inspection Services, Two AT&T Facilities, <br />2300 East Eight Mile Road and 4051 Newton Road in Stockton, California <br />^10 3 <br />4005 Port Chicago Highway <br />Concord, California 94520-1120 <br />Phone: 925.288.9898 <br />Fax: 925.288.0888Shaw * Shaw Environmental, Inc. <br />Water Well Sampling <br />On November 4, 2008 Dietz Engineering, a certified water well operator, collected samples from <br />the wells at each of the sites. The samples were analyzed in accordance with the CSJEHD <br />requirements. Results were negative for potential drinking water violations. After receipt, the <br />analytical reports were submitted to the CSJEHD. Copies of the laboratory reports are included <br />in Attachment 1. <br />Backflow Testing <br />On November 4, 2008, Shaw arranged for Rick Wahl, a certified backflow prevention tester, to <br />test the well at the 2300 East Eight Mile Road facility. The backflow prevention device on the <br />well functioned properly? “Results were then submitted to the CSEHD. A copy of the test report <br />is included in Attachment 2. <br />Ongoing Sampling <br />At the request of the CSJEHD, monthly sampling for total coliform bacteria will be performed at <br />the 4051 Newton Road facility, and quarterly monitoring for gross alpha particles at both <br />facilities. In addition, quarterly sampling for total coliform bacteria will be performed at the East <br />Eight Mile Road facility. Shaw will provide copies of the laboratory analytical reports to AT&T <br />upon receipt. <br />V? <br />T <br />£ <br />n- <br />T