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f <br /> GRANITE CONSTRUCTION FACILITY <br /> March 17, 1997 <br /> Page 3 <br /> July 7, 1994 - Groundwater monitoring wells MWI - MW6 were sampled. <br /> Analysis of water samples collected from NMI - MW3 revealed <br /> elevated concentrations of TPH as gasoline ranging from 570 µg/l <br /> to 1100 pg/l. No detectable concentrations of TPH as gasoline, <br /> diesel, or BTEX were detected in wells MW4 - MW6. <br /> October 7, 1994 - Groundwater monitoring wells NMI -MW6 were sampled. <br /> Analysis of water samples collected from MW 1 - MW3 revealed <br /> elevated concentrations of TPH as gasoline ranging from 84 µg/l to <br /> 670 µg/1. No detectable concentrations of TPH as gasoline, diesel, <br /> or BTEX were detected in wells MW4 -MW6 <br /> 1995 <br /> January 9, 1995 - Groundwater monitoring wells MW 1 -MW6 were sampled. <br /> Analysis of water samples collected from NMI - MW3 revealed <br /> elevated concentrations of TPH as gasoline ranging from 190 pg/I <br /> to 760 µg/l. No detectable concentrations of TPH as gasoline, <br /> diesel, or BTEX were detected in wells MW4 - MW6. <br /> January 17, 1995 - One soil boring (B18) and two additional monitoring wells were <br /> drilled in the vicinity of the former USTs. Analysis of soil samples <br /> collected from the borings did not reveal any detectable <br /> concentrations of petroleum hydrocarbons. <br /> January 23, 1995 - Groundwater samples were collected from monitoring well MW7 <br /> and MW8. Analysis of water samples collected from MW7 and <br /> MW8 revealed no detectable concentrations of petroleum <br /> hydrocarbons. <br />