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III <br /> From each soil boring , undisturbed soil samples will be collected at five foot intervals into acetate <br /> liners using the Geoprobe sampler. In the field , a geologist will log all soil samples for <br /> hydrogeologic and lithologic characteristics according to the Unified Soil Classification System and <br /> screen each sample for any organic vapors using a PID. <br /> At the top of the groundwater-bearing zone in each soil boring , a push driven groundwater sampling <br /> device will be advanced an additional two feet into the formation . When the desired depth is <br /> reached , the sampler will be pulled up approximately four feet to expose the open borehole to an <br /> inner core well screen . Prior to groundwater sampling , groundwater from each of the borings will <br /> be hand purged using a check valve and polyethylene tubing . The volume of groundwater purged <br /> will depend on the strength of groundwater recharge. Following purging , groundwater samples will <br /> be collected through the Geoprobe drive rods using a bailer. <br /> Each of the soil borings will be abandoned using neat cement grout. The boreholes will be filled <br /> with grout from the bottom using a tremie pipe . Following borehole abandonment, the surface <br /> pavement will be restored . <br /> 2 . 2 . 2 Laboratory Analysis of Soil and Groundwater Samples <br /> Soil and groundwater samples will be properly contained , labeled , preserved and transported under <br /> chain-of-custody documentation to a state of California certified hazardous waste testing laboratory <br /> for analysis. Based on field observations and PID measurements, approximately three soil samples <br /> per boring and all of the groundwater samples will be submitted for laboratory analysis. Additional <br /> soil samples may be submitted for analysis, if required to adequately characterize the site. Field <br /> observations and sample selection will be reviewed with the PHS/EHD inspector, prior to sample <br /> submittal to the lab. <br /> Each soil and groundwater sample will be analyzed for TPH-as-gasoline, BTEX, MTBE, di-isopropyl <br /> ether (DIPE) , ethyl tertiary butyl ether (ETBE) , tertiary amyl methyl ether (TAME) , and tertiary <br /> butanol (TBA) by EPA Method 8260B , and for TPH-as-diesel , TPH-as-motor oil and TPH-as- <br /> kerosene by EPA Method 8015M . The soil samples collected from the soil boring adjacent to the <br /> former dispenser will also be analyzed for total lead by EPA Method 6010. All laboratory analyses <br /> will be performed on a standard turn-around . <br /> i <br /> 7 <br />