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i <br /> Quarterly Groundwater Monitoring Report <br /> Frontier Transportation <br /> ' 0998-411 <br /> October 16, 1998 <br /> ' Table I: Groundwater Monitoring Results Using EPA Methods 8015 and 8420( /L) <br /> Well ID Date D-T-TW TPH-g TPH-d B T E X MTBE11 <br /> MW-1 08/96 10.34' 1.800 <50 98 18.8 55.8 130 L300 <br /> 04/97 9.21' 520 68 31 <0.5 2.8 1.5 910 <br /> 03/98 6.90' <50 <500 <0.5 <0.5 <0.5 <1 11 <br /> 09/98 10.05' <50 <500 <0.5 <0.5 <0.5 <1 63 <br /> MW-2 08/96 10.20' 850 95 12.7 7.9 4.5 120 12.3 <br /> 04/97 9.02' 73 250 6.4 <0.5 2.2 0.7 <12.5 <br /> 03/98 6.70' <50 <500 <0.5 <0.5 <0.5 <1 <5.0 <br /> 09/98 9.87' 120 <500 4.4 <0.5 1.3 <1 <5.0 <br /> MW-3 08/96 10.40' 8,00(} 610 610 170 96.6 54.0 1.700 <br /> 04197 9.25' 30,000 1,8(}0 3.200 2,000 1,400 1,(}00 14,000 <br /> 03198 7.10' 42.000 <500 7,290 500 <25 560 29.400 <br /> 09/98 10.08' 26,000 600 3.570 190 854 1,357 13.600 <br /> MW-4 03/98 6.20' <50 <500 <0.5 <0.5 <0.3 <I <3.0 <br /> 09/98 9,66' 80 <500 1.6 <0.5 1.6 2.8 <5.0 <br /> MW-5 03/98 7.06' <50 <500 <0.5 <0.5 <0.5 <I <5.0 <br /> ' 09/98 9.97 90 <500 0.6* <0.5 <0.5 2 v.0 <br /> MW-6 03/98 7.05' <250 1.500** <2.5 <2.5 <2.5 <5.0 <25 <br /> ' 09/98 10.04' <50 <500 <0.5 <0.5 <0.5 <I <5.0 <br /> MW-7 03/98 6.70' <50 1. [<500 N.5 <Q.5 <(}.5 <I <5.0 <br /> 09198 9.85' <50 <500 <0.5 <(}.5 <0.5 <1 <5.0 <br /> ' *=Mixture in Mineral Spirit/Diesel Range. <br /> **=Unknown compounds in motor oil range. <br /> ' Laboratory analytical results identified high dissolved phase petroleum hydrocarbons <br /> exclusively limited to groundwater collected from MW-3. Groundwater collected from <br /> MW-1, MW-2, MW-4, MW-5, MW-6, and MW-7 identified no detectable (<500 ug/L) dissolved <br />' TPH-d concentrations. In monitoring well MW-3, groundwater analysis identified a TPH-d <br /> concentration of 600 ug/L. Dissolved concentrations of TPH-g were identified below 100 ,ug/L <br /> from groundwater samples collected from MW-1, MW-4, MW-5, MW-6, and MW-7. Only two <br />' monitoring wells observed TPH-g concentrations greater than 100 ug/L, 120 µg/L in MW-2 and <br /> 26,000 ug/L, in MW-3. No detectable concentrations of BTEX were identified in groundwater <br /> collected from MW-1, MW-6, and MW-7. Low level BTEX concentrations were observed in <br />' groundwater collected from MW-2, MW-4, and MW-5 at <5.7 ug/L, <6 ug/L, and 2.6 ug/L, <br />' 3 <br />