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30 August 1999 <br /> AGE-NC Project No 97-0312 <br /> -Page 3`of 8 " <br />' A water-tight, traffic-rated well box was installed over UST-6 The well and boring locations are ` <br /> shown on Figure 2 The monitoring well construction is illustrated on Figure 3 , <br /> 24 LABORATORY ANALYSES OF SOIL SAMPLES <br />' Selected soil samples and the three grab water samples were analyzed for <br /> r <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> I accordance with EPA Methods 5030 and 8015m, and <br /> • Volatile aromatic hydrocarbons (benzene, toluene, ethylbenzene and total xylenes, BTEX) <br /> with methyl tertiary-butyl ether (MTBE) in accordance with EPA Method 8020/602 <br /> Four soil samples and the three grab water samples were also analyzed for <br /> IFuel oxygenates (MTBE, di-isopropyl ether [DIPS], ethyl tert-butyl ether [ETBE], tert-amyl <br /> methyl ether [TAME] and tert-butanol [TBA]) in accordance with EPA Method 8260 <br /> modified <br /> 2 5 MONITORING WELL PURGE PROCEDURES <br /> On 16 June 1999, a Solinst ,Nater level meter was used to measure the depth to ground water in- <br /> monitoring wells UST-2 through UST-6, relative to the tops of the well casings The ground water <br /> elevation,in each well and hydraulic gradient were determined fromrthese data (Table 4) <br /> After measuring ground water depths, monitoring vell UST-6 was developed using a PVC bailer <br /> to remove sediment within the well casing Approximately'l5 gallons of water was removed Due <br /> to pump failure, further purging was not performed On 17 Tune 1999,-monitoring wells UST-2 <br /> through UST-6 were purged using a Grundfos submersible purge pump Approximately 14 to 18 <br /> gallons of water was removed from each of these wells Ground water was purged frarn near the top , <br /> of the water column to remove water trapped within the unscreened interval of the well casings <br /> Temperature, pH and conductivity of purged \,�ater were measured at regular purge-volume intervals <br /> during purging using an ICM model 52200 water analyzer The recorded field data and logs are <br /> included in Appendix C Purged water was stored on-site in 55-gallon DOT-approved drums pending <br /> laboratory analyses <br /> t <br /> 4di arced CIOs•n%a onm�n1j1,Inc <br /> I <br /> S 3 <br />