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polyvinyl chloride (PVC) screen (depending on depth to groundwater) at the terminal end and blank <br /> PVC risers from the top of the screen interval to the ground surface. A groundwater sample will be <br /> retrieved from temporary monitoring well using a new section of 3/8-inch diameter polyethylene tubing <br /> with a check valve at the terminal end or through a peristaltic pump and conveyed into hydrochloric <br /> acid-preserved VOA vials. Each vial will be filled with no observable headspace or air bubbles to <br /> minimize the potential for volatilization, labeled for identification, and stored in an iced cooler. New <br /> screens and tubing will be used for each monitoring well. The risers will be decontaminated between <br /> boreholes to prevent cross-contamination; <br /> • After drilling activities, the borings will be backfilled per SJCEHD requirements (e.g., tremie grouting <br /> with Portland neat cement grout) and capped to match the existing ground cover; <br /> • A total of 42 soil samples and one groundwater sample will be prepared for laboratory analysis; <br /> • Based on field-screening results, up to 20 soil samples and one groundwater sample will be analyzed <br /> for carbon chain total petroleum hydrocarbons (TPH-cc) via EPA Method 8015 and for VOCs via EPA <br /> Method 8260; <br /> • Soil cuttings will be retained in properly labeled drums; <br /> • The data will be compared to applicable screening criteria, and a report will be prepared summarizing <br /> field activities, methods, and findings; and <br /> • Pertinent data will be submitted to the SJCEHD for review. <br /> Signatures of Environmental Professionals <br /> If you have any questions regarding this Phase II Subsurface Investigation Work Plan, please do not hesitate <br /> to contact Michel Helou at (774)414-3666 or Brian Godbois at (206) 518-4274. <br /> Sincerely, <br /> ��A <br /> Michel Helou Brian Godbo* <br /> Project Manager Senior Project Manager <br /> Attachments: 1. Proposed Sample Location Map <br /> Page 4 PARTNER <br />