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APPENDIX O <br /> FIELD AND LABORATORY PROCEDURES <br /> 4 <br /> Site Health and Safety Plan <br /> As required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous <br /> Waste Operations and Emergency Response" guidelines (29 Code of Federal Regulations Section <br /> 1910 120), and by California Occupational Health and Safety Administration (Cal-OSHA) "Hazardous <br /> Waste Operations and Emergency Response" guidelines (California Code of Regulations Title 8, <br /> Section 5192), SECOR will prepare, or modify the existing, site-specific health and safety plan <br /> (SHSP) prior to the commencement of fieldwork Field staff and contractors will review the SHSP <br /> before beginning field operations at the site <br /> Permitting <br /> The applicable permits will be obtained from the City of Stockton and the San Joaquin County <br /> Environmental Health Department (SJCEHD), prior to drilling <br /> Well Destruction <br /> Based on historical data and current groundwater monitoring data the existing monitoring wells have <br /> been identified as having submerged screens The existing three groundwater monitoring wells will <br /> be replaced and removed from the monitoring and sampling plan An alternative use for MW-1 <br /> through MW-3 will be evaluated In the event that an alternative use for MW-1 through MW-3 is not <br /> found they will be properly decommissioned <br /> • Soil Boring/Monitoring Well Installation <br /> Eight soil borings will be advanced by a C-57 licensed contractor at the locations shown on Figure 2 <br /> Five of the eight sod borings will be advanced using 6-inch hollow stem augers, for the purpose of <br /> collecting soil and groundwater samples to a depth of approximately 40 feet bgs Three sod borings <br /> (MW-4 through MW-6) will be advanced using 8-inch diameter hollow-stem augers to a depth of <br /> approximately 40 feet bgs Monitoring wells will be constructed in borings MW-4 through MW-6 <br /> Soil samples will be collected in 5-foot intervals and logged in accordance with the unified soil <br /> classification system (USCS) as presented by American Standards for Testing Materials (ASTM) <br /> D2488, to assess the soil types and moisture content <br /> Soil Borings and Sampling <br /> The soil borings will be drilled using 6-inch and 8-inch hollow stem augers to depths between <br /> approximately 40 and 50 feet bgs Soil samples will be collected at 5-foot intervals for soil <br /> description purposes, headspace analysis and for possible submission for chemical analysis The <br /> modified California split-spoon sampler will be driven a maximum of 18 inches into relatively <br /> undisturbed soil ahead of the augers through the action of a 140 Ib hammer falling an approximate <br /> distance of 3 feet Soil samples collected for chemical analysis will be retained in brass liners, <br /> capped with Teflon sheets and plastic end caps, labeled and sealed in clean zip-lockTm bags <br /> Labels will contain a unique sample number, date and time of collection and sampler identification <br /> The samples will be placed on ice for transport to the laboratory accompanied by a chain-of-custody <br /> record Drilling equipment will be previously decontaminated prior to use Sufficient auger length will <br /> be brought to the site so decontamination of augers on-site will not be necessary Down-hole <br /> sampling equipment will be washed in an AlconoxTM, or similar, solution between samples <br /> j , <br />