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2) Install a regenerative blower to the outlet connected to the piping located beneath <br /> the USTs <br /> 3) Monitor air for the presence of volatile organics using a photo-ionization detector <br /> (PID) pre-calibrated to isobutylene <br /> 4) Collect air samples from the blower discharge Two or three samples will be collected <br /> during the one-hour test period Samples will be analyzed for TPH as gasoline and <br /> BTE&X in accordance with approved EPA Methods <br /> 5.2 Extended Purge <br /> The following procedures will be followed to perform the extended purge <br /> 1) Measure the static water depths in each well prior to initiation of extended purge <br /> I2} Purge monitoring well MW-2 using a submersible purge pump We anticipate <br /> removing a maximum of 500 gallons of water in approximately 6 to 8 hours Purge <br /> water will be stored on-site in 55-gallon DOT drums or an above-ground Baker tank <br /> 3) While the purge pump is operating, install a regenerative blower over the well head <br /> The negative pressure supplied by the bloN%er should increase the well recharge <br /> 4) Measure depths-to-groundwater in surrounding wells on an hourly basis <br /> 5) Surge and purge wells MW-1, MVV-3, MW-4, MW-5 and MW-6 of a minimum of 3 <br /> well volumes to stabilized temperature, pH and conductivity Parameters will be <br /> measured at one-gallon intervals <br /> 6) Contain purge water in 55-gallon DOT drums and store on-site pending analytical <br /> results <br /> 7) After water parameters have stabilized, collect a water sample from each well using <br /> a new disposable bailer Samples will be collected in EPA 40-m1 vials <br /> 8) Collect a water sample from each purge water container Purge water samples will <br /> composited at the laboratory for analysis <br /> 9) Store the samples on ace and transport under chain-of-custody to a state-certified <br /> laboratory for analysis Samples will be analyzed for TPH as gasoline and BTE&X <br /> is accordance with EPA methods 8015m and 602 The analytical results of the purge <br /> water sample will be used to determine the disposal method <br /> Oeobp,wrdN 5e..+s. ,. <br /> L—kf.,d B--._,9 goe&S 6 <br />