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k" K L E I N F F L D E R <br />5.2 GROUNDWATER SAMPLING RESULTS <br />Three (3) groundwater samples were collected from monitoring wells MW -1, MW -2, and MW -3, <br />located downgradient and north of the showroom, upgradient and southeast of the service garage, <br />and downgradient and west of the showroom, respectively (Plate 2). Table 3 summarizes the <br />groundwater analytical results. <br />TABLE 3 <br />SUMMARY OF GROUNDWATER ANALYTICAL RESULTS <br />MCL = Maximum Contaminant Level per 22 CCR <br />mg/L = milligrams per liter <br />ug/L = micrograms per liter <br />ND = analyte not detected above the laboratory reporting limit <br />NA = not applicable, no MCL established <br />5.2.1 Groundwater Flow Direction and Gradient <br />The groundwater monitoring wells were surveyed for elevation and location on the Tradeway <br />Chevrolet site. The tops of the monitoring well PVC casings were chosen as the measuring point <br />for the survey as they are also the measuring point during sampling. The groundwater flow <br />direction and gradient was calculated using the surveyed information. Please refer to the following <br />table for the data used to calculate the groundwater flow direction and gradient. <br />20-3978-03.CHEV / ST02RI I I Page 12 of 18 <br />Copyright 2002, Kleinfelder, Inc. July 1, 2002 <br />MW -1 <br />MW -2 <br />MW -3 <br />Units <br />MCL <br />Date Sampled <br />Sample ID Number <br />5/28/02 <br />25331 <br />5/28/02 <br />25332 <br />5/28/02 <br />25333 <br />TPH-g <br />ND <br />ND <br />ND <br />ug/L <br />NA <br />Benzene <br />ND <br />1.5 <br />ND <br />ug/L <br />1.0 ug/L <br />Toluene <br />ND <br />1.6 <br />ND <br />u <br />150 u <br />Eth lbenzene <br />ND <br />1.3 <br />ND <br />ug/L <br />700 ug/L <br />Xylene <br />ND <br />8.3 <br />ND <br />ug/L <br />1,750 u <br />MTBE <br />ND <br />ND <br />ND <br />u <br />13 ug/L <br />DIPE <br />ND <br />ND <br />ND <br />u <br />NA <br />ETBE <br />ND <br />ND <br />ND <br />ug/L <br />NA <br />TAME <br />ND <br />ND <br />ND <br />u <br />NA <br />Methanol <br />110 <br />ND <br />ND <br />ug/L <br />no MCL, 740,000 ug/L <br />taste and odor threshold <br />W G <br />Fuel Fingerprint <br />ND <br />ND <br />ND <br />m /L <br />NA <br />MCL = Maximum Contaminant Level per 22 CCR <br />mg/L = milligrams per liter <br />ug/L = micrograms per liter <br />ND = analyte not detected above the laboratory reporting limit <br />NA = not applicable, no MCL established <br />5.2.1 Groundwater Flow Direction and Gradient <br />The groundwater monitoring wells were surveyed for elevation and location on the Tradeway <br />Chevrolet site. The tops of the monitoring well PVC casings were chosen as the measuring point <br />for the survey as they are also the measuring point during sampling. The groundwater flow <br />direction and gradient was calculated using the surveyed information. Please refer to the following <br />table for the data used to calculate the groundwater flow direction and gradient. <br />20-3978-03.CHEV / ST02RI I I Page 12 of 18 <br />Copyright 2002, Kleinfelder, Inc. July 1, 2002 <br />