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CONESTOGA—ROVERS <br /> & ASSOCIATES <br /> SELF -MONITORING REPORT — MARCH 2007 <br /> Reporting Period Activities <br /> 1 . Cambria continued routine operation and maintenance. <br /> 2. Cambria collected annual samples from the system on March 1 , 2007 . <br /> 3 . CRA prepared this document, which includes tabulated operational and sample analytical <br /> data (Tables 1 and 2). Laboratory analytical reports are included in Attachment A. <br /> Shell' s certification statement is included in Attachment B . <br /> Reporting Period Data Summary <br /> it Compliance Sampling Frequency Monthly <br /> Discharged Volume 241 070alg lons <br /> Average Discharge Flow Rate 6 .46 gallons per minute <br /> Maximum Discharge Flow Rate 12 .5 gallons per minute <br /> Discharge Violations or Exceedances None <br /> System Up-Time 680/ <br /> Tables : 1 - Groundwater Extraction — System Analytical Data <br /> 2 - Groundwater Extraction — Operation and Mass Removal Data <br /> Attachment: A — Laboratory Analytical Reports <br /> B — Certification Statement <br /> Conestoga-Rovers & Associates (CRA) prepared this document for use by our client and appropriate regulatory a encies. It is based partially on information available to CRA from outside sources and/or in the public domain, and <br /> g <br /> ion supplied by CRA and its subcontractors. CRA makes no warranty or guarantee, expressed or <br /> partially on informat <br /> implied, included or intended in this document, with respect to the accuracy of information obtained from these outside <br /> sources or the public domain, or any conclusions or recommendations based on information that was not independently <br /> verified by CRA. This document represents the best professional judgment of CRA. None of the work performed <br /> hereunder constitutes or shall be represented as a legal opinion of any kind or nature. <br /> \\Son-sl%shamd\Sonoma.Shell\Stockton 2575 Country Club\REMEDIATION\GWE Reports\2007\03Self-Monitoring. March07 <br /> Data\0783 GWE Self-Monitoring March07.doc <br />; I <br />{ Worldwide Engineering, Environmental, construction, and IT Services <br />