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Site Background Information: Herman and Helens Marina <br /> Page 9 of 13 <br /> MTBE was detected by TCLP in samples B15-14.16, B16-16, B17-11.5 and B17-15 <br /> at concentrations ranging from 0.0019 mg/I (1315-14.16) to 0.086 mg/I (1317-11.5). <br /> • HU3: Soil samples B15-26, B16-26, B17-27, MW11-50 and MW11-60 were collected <br /> from HU3. TPH-g and TPH-d were not detected in HU3 samples. The BTEX <br /> compounds toluene and xylenes were detected in sample B15-26 at low <br /> concentrations of 0.013 mg/kg and 0.01 mg/kg, respectively. <br /> • The fuel additive MTBE was detected in samples B15-26 and B17-27 at <br /> concentrations of 0.012 mg/kg and 0.64 mg/kg, respectively; MTBE was detected <br /> by TCLP only in sample B17-27 at a concentration of 0.063 mg/I. <br /> • HU4:Soil samples MW11-70 and MW11-80 were collected from HU3. Petroleum <br /> hydrocarbons were not detected in HU4 soil samples. <br /> • No additional analytes were detected at or above laboratory detection limits in the <br /> soil samples analyzed, and none of the analyzed compounds were detected at or <br /> above laboratory detection limits in the soil samples collected from borings MW12 <br /> and MW14. <br /> Ground Water Samples <br /> • A total of 15 grab ground water samples from soil borings B14 through B17 and <br /> CPT1 through CPT4 were collected in the hydrogeologic intervals HU1, HU3, HU4, <br /> HU7 and HU8. <br /> • HU1: Grab ground water samples B14 through B17, and CPT4-17 were collected <br /> from HU1. TPH-g was detected in samples B15 through B17, and CPT4-17 at <br /> concentrations ranging from 22,000 micrograms per liter (Ng/1) in sample B16 to <br /> 140,000 pg/I in CPT-4-17. TPH-d was detected in samples B15 through B17 at <br /> concentrations ranging from 920 pg/I (1317) to 6,800 pg/I (615). Petroleum <br /> hydrocarbons were not detected in sample B14. BTEX compounds were detected <br /> in all HU1 samples at maximum concentrations of 1,400 pg/I benzene (1316), 2,800 <br /> pg/I toluene(B16), 2,200 pg/I ethylbenzene(1315) and 9,400 pg/I total xylenes(1315). <br /> The fuel additive MTBE was detected in samples B15 through B17, and CPT4-17 <br /> at concentrations ranging between 5,500 pg/I (1316) and 130,000 pg/I (CPT4-17). <br /> The fuel additive TAME was detected in samples B17 and CPT4-17 at <br /> concentrations of 260 pg/I and 1,800 pg/l, respectively. <br /> • HU3: Grab ground water sample CPT3-61 was collected from HU3. Petroleum <br /> hydrocarbons were not detected in sample CPT3-61. <br /> • HU4: Grab ground water samples CPT1-55, CPT3-80 and CPT4-54 were collected <br /> from HU4. Petroleum hydrocarbons were detected only in sample CPT3-80. TPH-g <br /> was detected at a concentration of 100 fag/I, and the BTEX compounds were <br /> detected at concentrations of 7.4 pg/I benzene, 14 pg/I toluene and 6.2 pg/I xylenes. <br /> Advanced Geo Environ mental,Inc. <br />