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�`■ KLEINFELDER <br /> able to be collected if hardpan soil, gravel beds, buried debris, or bedrock are encountered. In the <br /> event that refusal occurs, hollow-stem auger drilling would likely be used at an additional cost to <br /> Beck Development, following client approval. <br /> The Geoprobes will be advanced to an approximate total depth of 10 feet below ground surface <br /> (bgs), which is slightly above first estimated groundwater. The Geoprobes will be advanced <br /> using a pneumatically driven steel probe. Soil samples will be obtained by inserting a sample <br /> barrel, lined with acetate tubes, into the probe. The sample barrel will be lowered to the desired <br /> sampling depth and driven into the soil. The sample tubes will be removed and sealed with <br /> Teflon® film and plastic end caps. <br /> Continuous soil cores will be extracted during the advancement of the probes. Soil samples will <br /> be continuously logged, based on recovery, for lithologic classification. Lithologic classification <br /> will be based on the Unified Soil Classification System (USCS). Qualitative field screening will <br /> be conducted at five foot intervals or more frequently, based on field observations. The field <br /> screening will be conducted using an organic vapor analyzer (OVA). The OVA measures <br /> ionizable compounds in air in parts per million by volume (ppmv). A single soil sample of soil <br /> above estimated groundwater will be obtained for quantitative chemical analysis. The soil <br /> sample will be selected, based on OVA readings and field observations. Currently, we anticipate <br /> groundwater in the vicinity of the project site to be present at a depth of approximately 10 feet <br /> bgs. At this time, we propose to analyze one soil sample from each boring. The sample would <br /> be selected based on the highest PID reading and other field observations. <br /> After collection, the soil samples will be labeled, logged on a chain-of-custody, and immediately <br /> stored in an iced cooler. The soil samples will be transported to Kleinfelder's office and then <br /> transported by courier in a sealed container to Sequoia Analytical of Sacramento, California <br /> (Sequoia) for chemical analyses. Sequoia is certified by the California Department of Toxic <br /> Substances to perform the requested analyses. A total of 108 soil samples, one from each <br /> Geoprobe location, will be analyzed for the following analyses: <br /> • Total Petroleum Hydrocarbons as referenced to Crude Oil And Lubricating Oil <br /> (TPH-CO and TPH-LO) by EPA Methods 8015M <br /> The samples will be analyzed on a normal laboratory schedule requiring approximately two <br /> weeks (ten working days) for completion unless an optional rush analytical turnaround is <br /> requested by the client at an additional charge. <br /> 2n-1'P8-160/2018P182/2018C356 Page A-3 <br /> © 1998, Kleinfelder, Inc. August 4, 1998 <br />