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CLEARWATER <br /> G R O U P, I N C <br /> ' request of Mr Michael Infurna, one soil sample collected at approximately 75 feet <br /> bgs was analyzed for volatile organic compounds (VOCs) by EPA Method 8240 and <br /> for and total petroleum hydrocarbons as diesel fuel (TPHd) by modified EPA Method <br /> ' 8015 <br /> The CPT boring was grouted from total depth to ground surface by pushing the CPT <br /> rods (containing a "knock out" plug) back down the borehole When the rods were <br /> extended to the total depth of the boring, bentonite grout was pumped into the <br /> borehole as the rods were withdrawn to the ground surface <br /> 2.2 Soil Boring Drilling Using Hollow-Stem Auger Equipment <br /> ' On September 18 through 20, 1995, Clearwater supervised the drilling of one <br /> monitoring well (MW-6), two SVE wells (VW-1 and VW-2), two air sparge wells <br /> (SW-1 and SW-2). Soil boring and well locations are shown in Figure 2. <br /> 1 Monitoring well MW-6 was drilled and completed to a depth of 40 feet bgs, and the <br /> SVE wells and air sparge wells were completed to depths of 25 feet bgs and 32 feet <br /> bgs, respectively <br /> Drilling was conducted condc ed by Mitchell Drilling Environmental Corporation (MDE) <br /> using a CME-75 high-torque drill rig The rig was equipped with 8- and 10-inch- <br /> diameter hollow-stem augers to install 2- and 4-Inch diameter wells, respectively <br /> All downhole equipment was steam cleaned between borings to prevent cross <br /> contamination. I <br /> ' r <br /> Soil samples were collected at 5-foot intervals by driving a California-modified split <br /> ' spoon sampler ahead of the lead auger Selected undisturbed soil samples were <br /> sealed in the 2-inch-diameter brass sample tubes using Teflon'and plastic end caps <br /> Sample screening, sample logging, and sample handling were conducted in the <br /> ' same manner as described in Section 2.1 Soil samples were submitted to AEN and <br /> analyzed for TPHg and BTEX ' <br /> ! <br /> I . <br /> � I <br /> ' 2.3 Installation of Air Sparge, SVE,'and Groundwater Monitoring Wells <br /> I <br /> ' E Air sparge wells, SVE wells, and the groundwater monitoring well were constructed <br /> 1 ! I I k ! i r 11 I <br /> using ,Schedule 40 PVC ,welly materials', Each screened interval was constructed <br /> "I <br /> using screenrwith 0.020-iinchl`wide slots, and a''filtef' ack of No. 3 sand xvas;emplaced L , <br /> between the screen Mand,wall of ithe'boririg A+ bentonite seal) was placed 'ablove the II 1 f <br /> IE1 ' II,Il� ' I I i I , I 11 I 'fell III <br /> ' filter pack by,'liydrating bentoiute pellets.' Portland cement grout was placed between <br /> 'i <br /> r II II <br />' I I <br /> I <br /> II 1 <br /> DiolIPAR/3Q/PILOT 4 <br /> '� tf li'r��lIII � <br /> r g <br /> iii '�li ;I I <br /> �'i�I I �� � I I i rn� ! i t r I l l�i 1r'q �i II r i1 I I i 'i r t Ili �' I�I I,N`,♦�E` ,! " 1' "11 EII I I' i h f I 11'h� ` I I I I I " j I I I If 4'I 111111 I tl � <br />