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09/18/2000 17 08 20916710 AGE STOCKTON PAGE 04/05 <br /> • 28 August 2000 <br /> AGE-NC Prod ect No 97-0249 <br /> Page 6 of 10 <br /> • EPA Method 602 for BTEX and MTBE, <br /> • EP,A.Method 8260 modified for methanol, ethanol, 1.,2-DCA, EDB, tertiary butanol (THA), <br /> di-isopropyl ether(DIPS), ethyl tert butyl ether(ETBE) and tert amyl methyl ether(TAME), <br /> and MTBE <br /> Laboratory reports for ground water analyses, testing methods, laboratory quality assurance/quality <br /> control (QA/QC)reports, and sample chmn of custody documentation will be presented in a report <br /> with the fundings and recommendations <br /> 3 6 DEPORT PREPARATION <br /> Following each quarterly ground water monitoring event, a quarterly report will be prepared <br /> presenting the findings The quarterly reports will include a description of work performed and the <br /> results of the soil and groundwater sampling and analysts Conclusions and recommendations will <br /> also be included in the reports, if applicable The report will be in a format acceptable to the PHS- <br /> EHD and the CVRW QCB, and will be reviewed and signed by a California Registered Geologist <br /> 4.0, FIELD PROCEDURES <br /> All field procedures will be overseen by au AGE representative under the supervision of a California <br /> Registered Geologist Procedures for the monitor ng well installation, well development, ground <br /> water sampling,soil sampling, equipment decontainrinatioin and sample shipment are outlined below <br /> 41 CPT DRILLING AND GRAB GROUND WATER SAMPLE COLLECTION <br /> CPT soil borings will be advanced to depths of 70 feet bsg utilizing a 25-tori truck-mounted CPT <br /> drill rig equipped with 2-inch diameter hollow-stem rods The first soil boring will utilize a hydraulic <br /> ram to advance a cone penetrometer to the desired depth Soil parameters such as cone bearing, <br /> sleeve friction, friction ration and pore water pressure will be measured as the cone penetrometer is <br /> advanced Rinseate generated during drilling activities will be containerized in properly labeled <br /> D O T 55-gallon drums, and stored on-site in an area lacking public access Disposal alternatives <br /> will be evaluated at a later date based on laboratory results of nnseate <br /> A second soil boring will be located adjacent the first CPT boring for ground water sample <br /> collection Based on CPT findings, discrete grab ground water samples will be collected in intervals <br /> of porous and permeable material beginning at a depth of 20 feet bsg A HydroPunch sample tool <br /> Advanced GeoEnvironmentai,Inc <br />