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19 July 2000
<br /> AGE-NC Project No 96-0232
<br /> Page 7 of 29
<br /> • water was collected in the rednlled P 13 at depths between 45-48 feet bsg, 64-67 feet bsg, 73-76 feet
<br /> bsg, and 90-93 feet bsg, respectively Second Zone, Rocky's Upper Zone, and Secondary Aquifer
<br /> Zone were sampled and grab ground water was collected in the rednlled P14 at depths between
<br /> 59-62 feet bsg, 73-76 feet bsg, and 85-88 feet bsg, respectively First Zone, Second Zone, Rocky's
<br /> Upper Zone, and Secondary Aquifer Zone were sampled for grab ground water from the rednlled
<br /> P15 at depths of 18-21 feet bsg, 37-40 feet bsg, 70-73 feet bsg, and 98-101 feet bsg, respectively
<br /> Second Zone, Rocky's Upper Zone, and Secondary Aquifer Zone were sampled for grab ground
<br /> water from rednlled P16 at depths of 37-40 feet bsg, 53-56 feet bsg, 70-73 feet bsg, and 87-90 feet
<br /> bsg, respectively Second Zone, Rocky's Upper Zone, Secondary Aquifer Zone, and Primary Zone
<br /> were sampled for grab ground water from redrilled P 17 at depths of 37-40 feet bsg, 55-58 feet bsg,
<br /> 80-83 feet bsg, and 111-114 feet bsg, respectively
<br /> A HydroPunch sample tool was pushed into the specified zone, then withdrawn approximately four
<br /> feet to expose an inlet screen The interior of the sampling tool fills with water and a 1-inch outer
<br /> diameter (O D ) stainless steel bailer was lowered and utilized to extract a ground water sample
<br /> Ground water samples were collected from each depth interval (zone) based on previously acquired
<br /> CPT-lithology data indicating favorable conditions for sampling ground water All nnseate generated
<br /> during drilling activities was containenzed in properly labeled DOT-approved 55-gallon drums, and
<br /> • was stored on-site in an area lacking public access All soil borings were backfilled over their entire
<br /> depth with a portland cement grout mix
<br /> . Following sample collection, the samples were placed in laboratory-supplied containers and
<br /> transported under chain-of-custody to a DHS-certified laboratory Each sample was analyzed for
<br /> TPH-g, TPH-d,BTEX, MTBE, DIPE, ETBE, TAME, TBA, methanol, ethanol, 1,2-DCA, and EDB
<br /> in accordance with EPA Methods 8015 and 8260B
<br /> 42 LABORATORY RESULTS OF GROUND WATER SAMPLES
<br /> A total of four ground water samples were collected and submitted for laboratory analysis from the
<br /> above mentioned depth intervals in P13 Methanol was detected in samples collected from Rocky's
<br /> Upper Zone(P13-64 to 67 and P13-73 to 76) at concentrations of 85 4gll and 170 µg/I, respectively
<br /> Ground water samples were collected from Second Zone, Rocky's Upper Zone, and Secondary
<br /> Aquifer Zone (85-88 feet bsg) in boring P14 Groundwater samples were collected from First Zone,
<br /> Second Zone, Rocky's Upper Zone, and the Secondary Aquifer Zone from P 15 Samples analyzed
<br /> from P 14 and P 15 were non-detect (ND) for the analytes tested
<br /> A total of four ground water samples were collected from P 16 and submitted for laboratory analysis
<br /> Ethanol was detected in Second Zone and Rocky's Upper Zone from ground water samples P16-37
<br /> to 40 and P16-70 to 73 at concentrations of 8 5 ,ugll and 8 6 ,ug/l, respectively MTBE was detected
<br /> Adianced CeoErmronmental,Inc
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