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CAMBRIA <br /> Work Tasks <br /> Permits. An appropriate permit for drilling will be obtained from S3CPHS/EHD <br /> Health and Safety Plan A site-specific Health and Safety Plan will be prepared for field <br /> work <br /> Utility Clearance- Proposed drilling locations will be marked and their locations cleared <br /> through Underground Services Alert (USA) prior to drilling <br /> Site Investigation: Two exploratory soil borings (CPT-1 and CPT-2) are proposed in the <br /> vicinity of the UST complex (Figure 2) CPT-1 will be drilled adjacent to, and on the <br /> downgradient side of, the UST complex This boring is being placed as close to the USTs as <br /> possible to delineate the vertical extent of petroleum hydrocarbons and MTBE in the source <br /> area Boring CPT-2 will be drilled adjacent to well MW-3 to delineate the vertical extent of <br /> petroleum hydrocarbons and MTBE downgradient of the UST complex Both of these <br /> borings will be drilled to 100 feet below grade (fbg) to log lithology Soil sampling and <br /> • groundwater sampling depths will be determined based on the soil types encountered We will <br /> target laterally continuous coarse-grained (sandy) zones for soil and groundwater sampling If <br /> no laterally continuous coarse-grained zones are encountered we will collect soil and <br /> groundwater samples at ten-foot intervals below first encountered groundwater from these <br /> borings <br /> Four soil borings (CPT-3 through CPT-6) will be drilled at the locations shown on Figure 2 to <br /> delineate the lateral extent of petroleum hydrocarbons and MTBE in the first encountered <br /> water bearing zone These four borings will be drilled to approximately 50 fbg where <br /> groundwater samples will be collected A silty sand zone was encountered in wells MW-1 <br /> through MW-3 at this approximate depth <br /> A Cambria geologist will supervise the drilling and describe encountered soils using CPT soil <br /> logging technology and the Unified Soil Classification System and Munsell Soil Color Charts <br /> (where soil samples are collected) Soil samples will be collected as described above for <br /> lithologic description and chemical analysis Soil samples will be screened in the field for <br /> organic vapors with a photo-ionization detector <br /> Soil samples will be retained in sample tubes and will be covered on both ends with Teflon <br /> • sheets and plastic end caps Soil samples will be labeled, entered onto a chain-of-custody <br /> 0955 5 <br />