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SOIL BORING/MONITORING WELL CONSTRUCTION PROTOCOL <br /> A. Notify the Environmental Health or Public Health Branch <br /> of the County Health Department in advance of all <br /> activity. <br /> B. Complete soil boring at the location determined by the <br /> soil gas investigation to groundwater. <br /> C. Obtain undisturbed soil samples at 5 foot intervals <br /> starting at a depth of 15 feet. Collect samples in brass <br /> tubes, cap with plastic end caps and seal with tape, then <br /> label and immediately place the samples in an ice chest <br /> for storage and transport to a certified laboratory under <br /> chain-of-custody. <br /> D. Test the samples suspected of cont'amination (based on <br /> field OVA instruments) at a certified laboratory for TPH <br /> (GC-FID) and BTEX (8020) . <br /> E. Install Schedule 40 PVC perforated casing from the total <br /> depth to 10 feet below grade and blank casing from 10 <br /> feet to grade. Install a filter pack in the annular <br /> space (2" minimum) from the total depth to 8 feet below <br /> grade, bentonite pellets from 8 feet to 5 feet below <br /> grade, and a watertight Christy box sealed in 5% <br /> bentonite/Portland cement grout to grade. <br /> F. Clean the sampling and drilling equipment with detergent, <br /> TSP, and water and/or steam clean between sampling and <br /> between borings to prevent cross-contamination. Wear <br /> disposable gloves during sampling and discard after <br /> sample is collected. Dry equipment with clean disposable <br /> paper towels and store in a clean, dry environment until <br /> needed for additional sampling. <br /> G. Stockpile all cuttings onsite on and covered by 10 mil <br /> visquine. Collect samples of cuttings and obtain <br /> certified laboratory analysis. If laboratory analysis <br /> indicates that cuttings are contaminated, dispose of <br /> properly at a designated site. <br /> r <br /> u <br /> u <br />