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1 <br /> 1 16 February 1999 <br /> AGE-NC Project No 97-0290 <br /> Page 6 of 11 <br /> 1 <br /> 3 6 LABORATORY ANALYSES OF GRAB WATER SAMPLES <br /> 1 Grab water samples were analyzed for <br /> • TPH-g In accordance with EPA Methods 5030 and 8415m, <br /> 1 <br /> • Volatile aromatic hydrocarbons (BTEX) with MTBE in accordance with EPA Method <br /> 180201602, and <br /> • Volatile organics with oxygenated compounds (DIPE, ETBE, MTBE, TAME and TBA) In <br /> accordance with EPA Method 8260 Modified <br /> Grab water samples collected from probing P3 and borings B4 through B7 were also analyzed for <br />' Total petroleum hydrocarbons quantified as diesel(TPH-d) in accordance with EPA Method <br /> 8015m <br /> 10 <br /> 3 7 MONITORING WELL PURGE PROCEDURES <br /> On 04 December 1998, a Solinst water level meter was used to measure the depth to ground water <br />' in monitoring wells MWI through MW5, relative to the tops of the well casings The ground water <br /> elevations and gradient were determined from these data(Table 7) <br />' After recording water level measurements, a PVC bailer was used to remove sediment from MWI <br /> through MW5 and to purge MW 1 and MW2 A two-stage submersible pump was then used to purge <br />' MW3, MW4 and MW5 of standing water and to develop the new wells Approximately 8 to 16 <br /> gallons of water were removed from each well <br />' On 22 January 1999, a PVC bailer was used to remove sediment from monitoring wells MW6 and <br /> MW7 A two-stage submersible pump was then used to develop the new wells <br />' On 26 January 1999, a Solinst water Ievel metes was used to measure the depth to ground water in <br /> monitoring wells MWI through MW7, relative to the tops of the well casings The ground water <br /> elevations and gradient were determined from these data (Table 7) After recording water levels, a <br /> PVC bailer was used to purge MW6 and MW7 of approximately eight gallons of water each <br /> For both monitoring events, ground water temperature, pH and conductivity were measured at <br /> regular purge-volume intervals during purging using an lCM water analyzer Field sheets and data <br /> are included in Appendix B Purged water was stored on-site In labeled, 55-gallon DOT-approved <br /> Advanced GeoEnNironmenta1,Inc <br /> I <br />