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25 January 1999 <br /> iAGE-NC Project No 97-0341 <br /> Page 5 of 6 <br /> CVRWQCB, and will be reviewed and signed by a California Registered Geologist <br /> 4.0. PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist Procedures for the soil/ground water sampling (if applicable), equipment <br /> decontamination and sample shipment are outlined below <br /> 41 SOIL SAMPLING PROCEDURES <br /> Soil borings will be advanced using direct push technology (Geoprobe 5404 soil probing unit) At <br /> least one soil boring will be continuously sampled using a macro core sampler Relatively <br /> undisturbed soil samples will be collected in all other borings using a Geoprobe soil sampling <br /> assembly loaded with pre-cleaned 1 125-inch by 6-mch brass sleeves Upon soil sample retrieval, <br /> the sample sleeve will be separated with a clean soil knife The exposed ends of the second sleeve <br /> will be covered with Teflon sheets, capped and sealed with tape Soils encountered in the borings <br /> will be visually classified by an AGE geologist in accordance with the Unified Soil Classification <br /> System(USCS) Additionally,soil samples will be field screened for the presence of volatile organic <br /> compounds using an organic vapor meter(OVM) <br /> Following sample collection, each preserved ground water container will be labeled with the boring <br /> Iocation, depth,time, date and sampler's initials Appropriately sealed and labeled samples will be <br /> placed in a chilled container under ice and transported under chain-of-custody procedure to a DHS- <br /> certified laboratory <br /> 42 GROUND WATER SAMPLE COLLECTION <br /> If ground water is encountered during sampling activities, then grab ground water sample will be <br /> collected from each soil boring utilizing a Geoprobe water sampling assembly For the sampling <br /> assembly,probe rods will be fitted with a retractable ground water screen and advanced to the total <br /> depth of each probe boring,the rods will then be pulled upward to allow ground water to flow into <br /> the screen A bailer fitting will then be placed on the end of 3/s-inch diameter polyethylene tubing, <br /> inserted through the rod assembly into the exposed screen, through which water will be manually <br /> pumped <br /> Following sample collection, each preserved groundwater container will be labeled with the boring <br /> location, depth, time, date and sampler's initials Appropriately sealed and labeled samples will be <br /> Aihanced GeoEnN ironmental,Inc <br />