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• 08 January 2004 <br /> AGE-NC Project No 95-0103 <br /> Page 3 of 8 <br /> In addition, the effluent samples were analyzed for pH In accordance with EPA Method 150 1 and <br /> total petroleum hydrocarbons quantified as diesel (TPH-d) by EPA Method 8015 Modified <br /> 2R MONITORING AND SAMPLING <br /> 3 QUARTERLY GROUND WATE <br /> On 28 November 2003,ground water monitoring and sampling were performed on monitoring wells <br /> MW-1 through MW-6 at the request of the EHD <br /> 2 3 1 Well Monitoring and Evacuation <br /> A Solinst water level meter was used to measure the depth to ground water In monitoring wells <br /> MW-1 through MW-6 relative to the tops of the well casings(Table 1) The ground water elevation <br /> In each well was calculated by subtracting the measured depth to ground water from the surveyed <br /> casing elevation I <br /> . After water levels were measured,ground water(amlmmum of three casing water-volumes per well) <br /> were evacuated (purged) from wells MW-1, MW-3, MW-4 and.MW-5 Well MW-1 was purged of <br /> 28 gallons utilizing a waterra lift-bailer Wells MW-3,MW-4 and MW-5 were purged of 7,4 and 9 25 <br /> gallons of water, respectively, utilizing polyethylene disposable bailers <br /> Temperature,pH and conductivity were measured for stabilization at regular purge-volume intervals <br /> from each well using an Oakton water analyzer,the field measurements are Included In Appendix B <br /> Purged water was subsequently treated through the on-site ground water treatment system <br /> 2 3 2 Ground Water Sample Collection and Analysis <br /> Water samples were retrieved from each purged well using the dedicated disposable bailers after <br /> allowing the well to achieve a minimum of 80 percent recharge prior to sample collection The <br /> samples were transferred Into 40-m1 EPA-approved VOA vials containing 0 5 ml of 18%hydrochloric <br /> acid as a sample preservative The samples were properly labeled and transported In a chilled <br /> container under chain-of-custody to CTEL a DHS-certified laboratory,for analysis The groundwater <br /> samples were analyzed for <br /> TPH-g In accordance with EPA Method 8015 Modified and <br /> • BTEX and MTBE In accordance with EPA Method 8260 <br /> Advanced GeoEnviron mental,Inc <br /> F <br />