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26 July 2001 <br /> AGE-NC Project No 95-0173 <br /> Page 3 of 4 <br /> 23 REPORT PREPARATION <br /> Following CPT boring advancement and analysis of grab ground water samples, a report of findings <br /> will be prepared The report will include a description of work performed and the results of the soil <br /> and groundwater sampling and analysis Conclusions and recommendations will also be included <br /> in the reports, if applicable The report will be in a format acceptable to the PHS-EHD and the <br /> RWQCB, and will be reviewed and signed by a California Registered Geologist <br /> 3.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist Procedures for CPT boring advancement, grab ground water sampling, <br /> equipment decontamination and sample shipment are outlined below <br /> 3 1 CPT DRILLING AND GRAB GROUND WATER SAMPLE COLLECTION <br /> Based on the sand content of soil samples collected at the site at depths down to 80 feet bsg and <br /> petroleum-impacted ground water in monitoring well samples from as deep as 100 feet bsg <br /> (MW-13), CPT soil borings will be advanced to target depths of approximately 150 feet bsg utilizing <br /> a 25-ton truck-mounted CPT drill ng equipped with 2-Inch diameter hollow-stem rods The first soil <br /> boring(sounding) will utilize a hydraulic ram to advance a cone penetrometer to the desired depth <br /> Soil parameters such as cone bearing, sleeve friction, friction ration and pore water pressure will be <br /> measured as the cone penetrometer is advanced <br /> To eliminate cross-contamination from the known contaminated zones, additional grouped CPT <br /> borings will be advanced adjacent the Initial CPT sounding for single target-depth ground water <br /> sample collection, only one grab water sample will be collected from each grouped CPT boring <br /> Based on findings of the Initial CPT sounding, discrete grab ground water samples will be collected <br /> in selected saturated Intervals of porous and permeable material A HydroPunch sampling tool will <br /> be pushed Into the specified zone, then withdrawn approximately three feet to expose an Inlet screen <br /> The interior of the sampling tool should then fill with water and a 1-Inch outer diameter (O D ) <br /> stainless steel bailer will be lowered and utilized to extract a ground water sample Grab ground <br /> water samples will be collected in intervals of porous and perineable material All nnseate generated <br /> during drilling activities will be containerized In properly labeled DOT-approved 55-gallon drums, <br /> and will be stored on-site in an area lacking public access <br /> Following sample collection, the samples will be placed in laboratory-supplied containers and <br /> transported under chain-of-custody to a DHS-certified laboratory <br /> Advanced GeoEnvironmental,Inc <br />