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%W/ <br /> 04 August 2006 <br /> AGE-NC Project No. 95-0137 <br /> Page 4 of 4 <br /> 3.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Professional Geologist. Procedures for the advancement of borings, ground water sampling, <br /> equipment decontamination, and sample shipment are outlined below. <br /> 3.1. BORING ADVANCEMENT <br /> Soil borings will be advanced using a van-mounted Geoprobe 540_0 direct-push probing unit <br /> equipped with 1.25-inch probing rods. The Geoprobe advances soifborings using a hydraulic <br /> hammer to drive soil sampling tools to specified depths. <br /> 3.2. GROUND WATER SAMPLE COLLECTION AND ANALYSIS <br /> Soil borings will be sampled for shallow ground water at a depth of 30 feet bsg. Grab ground water <br /> samples will be collecdt total depth using a Geoprobe water sampling assembly equipped with <br /> a 4-foot, 0.010-inch slotted polyvinylchloride (PVC) screen. Samples will be collected with a <br /> disposable tubing bailer into 40-milliliter (ml) volatile organic analysis (VOA) vials and 1-liter <br /> amber bottles as appropriate for the required analyses. Ground water samples will be analyzed by <br /> a DHS-certified laboratory for the constituents listed in Section 2.2.. <br /> Laboratory reports for ground water analyses, testing methods, laboratory QA/QC reports, and <br /> sample chain of custody documentation will be presented in a report with the findings and <br /> recommendations. <br /> 3.3. EQUIPMENT DECONTAMINATION <br /> Prior to use, all tools used for sample collection will be thoroughly rinsed with clean water after <br /> being washed in a solution of Alconox. All probing rods will be cleaned prior to advancement at <br /> each probe boring Iocation. <br /> 3.4. BORING ABANDONMENT <br /> All soil borings will be permanently sealed to prevent vertical migration of potential contaminants. <br /> Soil borings shall be abandoned by backfilling with portland cement from the total depth to surface <br /> grade. <br /> Advanced GeoEnvironmental,Inc. <br />