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Site Background Information : Stallworth Auto Sales Page 4 of 11 collected from 71 -74 feet bsg , 126- 129 feet bsg and 145- 148 feet bsg at concentrations of 1 . 3 pg/I , 1 . 8 tag/I and 11 pg/I , respectively. On 24 June 2002 , two ground water monitoring wells (MW-5 and MW-6) were installed at the site . MW-5 and MW-6 are screened from 20 feet to 40 feet bsg . • No soil samples were collected from boring MW-6. A total of 3 soil samples collected from well boring MW-5 were analyzed for TPH-g , TPH-d , BTEX, the suite of five fuel additives , 1 , 2-DCA and EDB . No analytes were detected at or above laboratory reporting limits . • After the installation and development of the two ground water monitoring wells on- site , all on-site wells were sampled . The ground water samples were analyzed for TPH-g , TPH-d , BTEX, the five fuel additives , 1 , 2-DCA and EDB . • TPH-g was detected in the water samples collected from MWAA and MW-6 at concentrations of 140 , 000 pg/I and 1 , 600 tag/I , respectively; TPH-d was detected in water sample MW- 1A at a concentration of 37 , 000 pg/I . • BTEX compounds were detected in the water samples collected from MW- 1A and MW-6 at concentrations as high as 1 ,400 pg/I benzene, 51 , 000 pg/I toluene , 5 , 500 pg/I ethylbenzene and 26 , 000 pg/1 total xylenes, in sample MWAA. • EDB was detected in the water sample collected from MW- 1A at a concentration of 210 pg/I . TBA was detected in water sample MW-6 at a concentration of 25 pg/I . In addition , the volatile organic compounds isopropyl benzene , n-propylbenzene , n- butylbenzene and napthalene were detected in water sample MW-6 at concentrations of 35 pg/I , 66 pg/I , 10 pg/I and 7 . 0 pg/I , respectively. • No other analytes were detected at orabove laboratory reporting limits in the ground water samples . On 15, 16 and 17 June 2004 , soil borings CPT-2 , CPT-3 and CPT-4were advanced on-site utilizing CPT technology to model the geological and hydrogeologic framework and to assess potential dissolved petroleum-migration pathways beneath the site . Lithologic data was collected from the initial borings. Twin borings were then advanced adjacent to the initial boring to collect grab ground water samples from selected depths. • Ground water samples were collected from CPT-2 at 105 to 109 feet bsg , 127 to 131 feet bsg , and 172 to 176 feet bsg ; ground water samples were collected from CPT-3 at 179 to 183 feet bsg , and 195 to 199 feet bsg ; and from CPT-4 at 76 to 80 feet bsg , 143 to 147 feet bsg , and 189 feet and 193 feet bsg . • TPH-g was detected in all the ground water samples collected from CPT-3 and CPT-4 , at concentrations ranging from 5 , 900 micrograms per liter ( pg/I ) in HU4 to Advanced CeaEnviranmenta4 lne.