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06 November 2003 <br /> AGE-NC Project No 98-0511 <br /> Page 4 of 5 <br /> hydrocarbon impacted soil and ground water and, if possible, the estimated volume of the <br /> contaminant plume and mass of the contaminants Also, conclusions and applicable <br /> recommendations will be included in the report The report will be in a format acceptable to the EHD <br /> and the RWQCB, and will be reviewed and signed by a California Registered Geologist <br /> 4.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist Procedures for the advancement of the soil probe borings, soil sampling, <br /> ground water sampling,equipment decontamination,sample shipment,and boring abandonment are <br /> outlined below <br /> 41 PROBE BORING ADVANCEMENT <br /> The probe borings will be advanced using a van-mounted Geoprobe 5400 direct-push probing unit <br /> • equipped with 1 25-inch probing rods The Geoprobe advances soil probe bonngs using a hydraulic <br /> or pneumatic hammer to drive soil and ground water sampling tools to specified depths <br /> 42 SOIL SAMPLING PROCEDURES <br /> Soil borings will be sampled at discreet five-foot Intervals using a 1 125" Geoprobe soil sampling <br /> assembly loaded with four six-inch brass sleeves Upon sample retrieval, the ends of the second <br /> sleeve will be covered with Teflon sheets, capped and sealed with tape <br /> Appropriately sealed and labeled samples will be placed in a chilled container under Ice and <br /> transported under chain-of-custody procedure to aDHS-certified laboratory Each sample sleeve will <br /> be labeled with the bonng designation,depth,time,date and sampler's initials Soils encountered in <br /> the bonngs will be visually classified by an AGE geologist in accordance with the Unified Soil <br /> Classification System(USCS) Additionally, soil samples will be field-screened for the presence of <br /> volatile organic compounds using an organic vapor meter(OVM), equipped with photo-ionization <br /> detector (PID) <br /> 43 IN-SITU GROUND WATER SAMPLING PROCEDURES <br /> A `grab' ground water sample will be collected at the water table utilizing a Geoprobe water <br /> • sampling assembly fitted with a pre-cleaned one-inch diameter 0 01-inch slotted temporary well <br /> Advanced GeoEnvi ron mental,Inc <br />