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CAM BR I A <br /> The well boring will be drilled with hollow stem auger drilling equipment. A Cambria geologist <br /> will supervise the drilling and describe encountered soils using the Unified Soil Classification <br /> System and Munsell Soil Color Chart. Soil samples will be collected at five-foot intervals for <br /> lithologic description and possible chemical analysis. Soil samples will be screened in the field <br /> at 5-foot intervals for organic vapors with an organic vapor meter. Organic vapor <br /> measurements will be recorded on the boring log. <br /> Soil samples will be retained in brass or stainless steel sample tubes and will be covered on <br /> both ends with Teflon sheets and plastic end caps. Soil samples will be labeled, entered onto a <br /> chain-of-custody record and placed into a cooler with ice for transport to a State of <br /> California certified laboratory for analysis. <br /> Monitoring Well Installation: The proposed well boring will be drilled in the manner <br /> described above and converted to a groundwater monitoring well. The well will be constructed <br /> of 2-inch diameter threaded Schedule 40 PVC well casing. Approximately 15 feet of screen <br /> will be placed in the well, with the screen placed at least 10 feet below and 5 feet above the <br /> top of the groundwater table. The sandpack will be placed 1 to 2 feet above the top of the <br /> well screen followed by a 1-foot thick bentonite seal. A. cement-grout seal will be placed <br /> above the bentonite seal to grade. The well will be secured with a locking cap under a traffic- <br /> rated well box. A well completion report will be prepared for the groundwater monitoring <br /> well. <br /> Groundwater Sampling: A Shell-approved sampling contractor will develop the groundwater <br /> monitoring well prior to sampling. After well development, groundwater samples will be <br /> collected. The samples will be submitted to a state-certified laboratory for analysis. <br /> Chemical Analysis: Groundwater samples and selected soil samples will be analyzed for <br /> Ti PH by EPA Metlhodr80,',5.(modified), benzene,. toluene, ethylbenzene, xylenes (BTEX) <br /> and MTBE by EPA Method 8020, and fuel oxygenates (MTBE, TAME, DIPE, ETBE, TBA, <br /> and 1,2-DCA) by EPA Method 8260. <br /> Report Preparation: Following the receipt of analytical results from the laboratory, Cambria <br /> will prepare a written report which will include field procedures, laboratory results, a boring <br /> log, and conclusions. <br /> The scope of work described in this work plan will be performed under the supervision of a <br /> registered geologist. <br /> 241-1359 3 <br />