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' Report of Findings <br /> Frontier Transportation, Inc. <br />' August 31, 2005 <br /> Page 2 <br />' In January of 1998, Blakely Environmental Investigations, Inc (BEII) advanced four(4) <br /> groundwater monitoring wells (MW-4 through MW-7)to assess the extent of subsurface <br /> contamination beneath the site Soil samples were collected every five feet Laboratory analysis <br /> of soil samples identified no detectable concentrations of TPH-g, B'I'ER, or MTBE <br /> In January 2000, BEII advanced two borings (B-5 and B-6), installed four additional <br /> groundwater monitoring wells(MW-8 through MW-11), and collected nine soil vapor oil identified sampinoes for <br /> a soil vapor survey as part of an additional site assessment Soil sample analysis <br /> detectable concentrations of petroleum hydrocarbons with the exception ofboring <br /> B-6 <br />' Maximum contaminant levels in B-6 were identified 100 mg/kg as TPH-g, µgIkg as BTEX, <br /> and 10,600 µg/kg as MTBE at 10' bgs Maximum soil <br /> subsequently or identified <br /> momtoring <br /> ' sample point V5 at 4'bgs Groundwater samples sequently collected from all <br /> wells <br /> ' In May 2002, BEII installed two additional groundwater monitoring wells (MW-12 and <br /> MW-13) screened from 30' bgs to 40' bgs Soil sample results identified maximum TPH-g, <br /> BTEX, and MTBE concentrations of 700 mg/kg, 115,000 µg/kg, and 25,000 µg/kg in soil <br /> ! collected from MW-13 at 10' bgs Soil concentrations attenuate by 99% at 15'bgs No <br /> detectable TPH-g,BTEX, and MTBE were identified if 325 tons <br /> 1 nips Also, <br /> monitoring <br /> icorand replaced d11 by-3 <br /> was abandoned prior to excavation and removal <br /> MW-3R- <br /> in <br /> W-3R <br /> oundwater monitoring well <br /> In June 2003, BEII installed an 1 addrtional ultidentified a maximum MTB�Co centration screened from_30' bgs to 40' bgs Soil sample res <br /> detectable <br /> ntrations of <br /> of,L020 gg/kg at 10'abgs using EPA Method i821b B-14 No <br /> See gore 2 forwell locations PH-g or <br /> CdTEX were identified in th <br /> e soil collected fro <br /> Qll��NZC� bol ;+26 IirYt�- Vrn�f/��bL <br /> Jin January 2004, BEII installed four additional groundwater momtonng wells Deep <br /> monitoring wells MW-15, MW-16 and MW-18 wadvanced 20bbg and screened reened from 3 0' <br /> from 5' <br /> bgs to 40' bgs Shallow momtonng well MW-17 was <br /> µlig <br /> bgs to 20' bgs Soil sample results identified a maximum MTBE concentration lead scavengers were at <br /> 10' bgs in MW-15 using EPA Method 8260B No other oxygenates <br /> detected The maximum TPH-gas detected was 17 mg/kg at 10' bgs in MW-15 using EPA <br /> Method 8015M No detectable BTEX was identified in the soil column for MW-15 through <br /> ' MW-18 See Figure 2 for well locations <br /> ' Quarterly groundwater monitoring has continued at the site and has identified the <br />