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Phase II ESA – Work Plan <br />206 N. Sutter Street <br />Stockton, San Joaquin County, California <br />Page 2 <br /> <br /> <br />investigation will be placed in a 55-gallon drum or lidded plastic bucket, sealed, labeled, and left on-site <br />pending laboratory analyses for disposal characterization. All borings will be backfilled with neat cement <br />grout pursuant to EHD guidelines. <br /> <br />4.0 FIELD PROCEDURES <br />4.1 SITE PREPARATION <br />Condor will obtain the necessary drilling permits from EHD prior to scheduling field activities with the <br />sub-contractors and notifying Underground Services Alert (USA). <br /> <br />The proposed boring locations will be marked with white paint and Underground Service Alert (USA) <br />will be notified at least 48 hours in advance of the fieldwork to locate and identify underground utilities in <br />and near the work area. In addition, a private utility locator will be contracted to scan and identify <br />potential subsurface piping and other anomalies, such as any remaining USTs using a ground penetrating <br />radar (GPR). <br /> <br />Prior to initiating fieldwork at the Site, all field personnel will familiarize themselves with the Site- <br />Specific Health and Safety Plan (HASP) and a tailgate safety meeting will be held prior to <br />commencement of fieldwork on location. The HASP pertains to field activities and includes information <br />on potential hazards expected to be encountered at the Site, personal protective equipment, and directions <br />to and telephone numbers for the nearest hospital. A copy of the HASP is included in Appendix C. <br /> <br />4.2 SOIL SAMPLING METHODOLOGY <br />Continuous Core sampling will be conducted and will involve acetate sleeves advanced into the soil in 5- <br />foot intervals. Each interval will be logged in general compliance with the unified soil classification <br />system (UCSC). Soil samples will be collected for laboratory submittal at 10 feet intervals. Groundwater <br />samples will be collected by advancing to the desired sampling depth and placing temporary casing (3/4” <br />PVC tubing) in the borehole and utilizing a peristaltic pump to extract a sample. <br /> <br />Each soil sample retained for laboratory analyses will be capped at each end with Teflon sheeting and <br />plastic end caps. Appropriate laboratory supplied containers (such as VOA vials and amber glass jars) <br />will be utilized to collect all groundwater samples. Soil and groundwater samples will be labeled, placed <br />in chilled coolers, and transported under chain-of-custody procedures to McCampbell Analytical Inc. <br />(ELAP# 1644) in Pittsburg, California for analysis. <br /> <br />5.0 LABORATORY ANALYSES <br />Soil and groundwater samples from the borings will be analyzed for volatile organic compounds (VOCs), <br />including benzene, toluene, ethyl benzene, and total xylenes (BTEX), oxygenated fuel additives, and total <br />range petroleum hydrocarbons (TPH) by EPA Method 8015m. Laboratory detection limits will be <br />sufficient for comparison to regulatory thresholds. A 10-day laboratory turnaround time will be requested. <br /> <br />6.0 REPORTING <br />Condor will evaluate the laboratory analytical results, qualify the data, and compare results to regulatory <br />screening thresholds. Condor will prepare a report detailing the investigation including detailed geologic <br />logs, laboratory analytical results, and conclusions/recommendations. The deliverables will include one <br />electronic copy of the report and up to three hard copies, if requested. Additional hard copies can be <br />included for additional fees if requested.