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Sample collection information will be entered onto a Chain of Custody (COO) form that <br />will accompany the samples during their residency at the site and during transport to the <br />laboratory that will perform the requisite analysis. <br />Preservation of the sample(s) will be achieved by placing the sample containers into a <br />pre-cooled container and maintained at a temperature of approximately 4 °C until the <br />sample(s) are delivered to the laboratory. Preservation of the sample(s) beyond cooling <br />is not required. <br />Copies of the COO will be included with the analytical results presented in the report <br />that will be prepared to document this investigation and remediation. <br />5.0 Analytical Protocol and Quality Assurance and Quality Control (QA/QC) <br />The groundwater sample will be submitted to a State certified laboratory for analysis of <br />the following constituents, <br />TPH-d and TPH-mo using United States Environmental Protection Agency <br />(USEPA) Modified Method 8015 <br />Samples will be analyzed within the required holding times for the specific analyses. <br />Laboratory QA/QC will be performed in accord with the requirements for the analysis of <br />TPH-d and TPH-mo as specified in the current USEPA SW-846. Field QA/QC will <br />consist of the inclusion of a trip blank for evaluation of sample cross-contamination <br />during transport of the sample(s). The trip blank will be included and analyzed for <br />TPH-d and TPH-mo. <br />Copies of the field and laboratory QA/QC will be included with the analytical results in <br />the report that will be prepared to document this investigation. <br />6.0 Investigation Report Preparation <br />Upon completion of field operations, a report will be prepared and submitted to DTSC. <br />The report will include, 1) a description of the work performed, 2) methodology for data <br />collection, 3) boring log, 4) analytical results, 5) site sketch indicating the location of the <br />new well, 6) interpretation of field and analytical data, and 7) recommendations, if any <br />for further work. Field activities and the preparation of the report will be under the direct <br />supervision of a geologist or an engineer registered in the State of California. <br />7.0 Signature <br />This workplan has been prepared under the direction of the Mr. Dani Renan, J.D., LLM, <br />R.G. (State of California Registered Geologist No. 6107). <br />CE Project No. 99R-4041 <br />Additional Monitoring Well Work Plan 5