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. 25 October 2002 AGE-NC PI oject No 02-0964 Page 5 of S advanced to appy oximately 160 feet bsg,depending on analytical results or Immediate field indications of grab water samples,the total depths of borings may vary according to subsurface conditions (e g , refusal) encountered during drilling activities Grab ground water samples will be collected in multiple Intervals of porous and permeable material, and lirruted soil samples will be collected at selected lithology changes to define the vertical extent of adsorbed hydi ocarbons below the farmer suspected UST-system locations Ground water and selected soil samples will be analyzed by a Department of Health Services(DHS)-certified laboratory foi petroleum hydi ocarbons, volatile organic compounds and halogenated organic compounds and fuel additives listed in Section 4 2 Laboratory reports for soil and ground water analysis, testing methods, laboratory QA/QC i eports, and sample chain of custody documentation will be presented In a report of findings and recommendations 33 REPORT PREPARATION Following the CPT site Investigation a report will be prepared presenting the findings Each report will Include a description of woi k performed and the results of the soil/ground water sampling and analysis Conclusions and recommendations will also be included in the reports preparing the site foi addition site assessment, Including monitor Ing well Installation and other corrective actions The report will be in a format acceptable to RWQCB guidelines, and will be reviewed and signed by a California Registered Geologist 4 0. FIELD PROCEDURES All field pi ocedul es will be ovei seen by an AGE i epresentative under the supervision of a California Registered Geologist Procedures for soil and ground watei sampling ale described below 41 CONE PENETROMETER TEST SOIL BORINGS Each CPT soil boring will be advanced to a total depth of 160 feet bsg utilizing a 25-tan truck- mounted CPT di ill ng equipped with 2-Inch diameter hollow-stem i ods The first soil bol Ing will utilize a hydi aullc ram to advance a cone penetrometer to the desired depth Soil parameters such as cone bearing, sleeve friction, friction ration and pore water pressure will be measured as the cone peneti ometer is advanced Rinseate generated as part of the drilling activities will be containerized In pr opel ly labeled DOT-approved 55-gallon drums and stored on-site in an area lacking public access Disposal alternatives will be evaluated at a latei date based on laboratory results of rinseate samples Advanced GeoEnvironmental,Inc