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r I <br /> I I q <br /> 21 December 1999 <br /> AGE-NC Project No, 98-0426 <br /> Page 3 of 6 <br /> ' 4 After recording water level measurements, a two-stag6 submersible pump was used to purge each <br />' monitoring well of standing water Approximately 6 gallons of water was removed from each well <br /> r (approximately 3 well casing volumes) Ground water temperature, pH and conductivity were <br /> measured at regular intervals during purging using a Hydac water analyzer Field sheets and data are' ' <br /> Included In Appendix C Purged water,was stored at 121 West Park Street in labeled, 55-gallon <br /> A DOT-approved drums <br /> , t i <br /> t ! <br /> 26 COLLECTION OF GROUND WATER SAMPLES <br /> 3 <br /> r Water samples were collected from each purged well using new disposable plastic bailers Each <br /> water sample was`transferred into 40-m1 VOA vials containing 0 5 ml-18% hydrochloric acid as a <br /> 11 sample preservative After collection, the samples were properly labeled, placed in a chilled r <br /> container and transported under chain-of-custody to Alpha Analytical Laboratories, Inc , and were <br /> analyzed for <br /> 1 rI <br /> • TPH-g In accordance with EPA Methods 5030/8015m, and ` <br /> • • Volatile aromatics(benzene,toluene,ethylbenzene and xylenes,BTEX)with methyl tertiary- <br /> butyl ether(MTBE) in accordance with EPA Method 602/8020 <br /> 27 SURVEYING " <br /> On 03 December 1999, the casing elevations of wells MW 1, MW2, and MW3 were surveyed to the"' <br /> }nearest 0 01-foot relative to each other by representatives�of AGE The casing of monitoring well' <br /> n MW was assigned an arbitrary elevation of 100 feet and the relative casing elevation of MW2 and <br /> MW3,calculated (Table'2) <br /> ! � I <br />' 3.0 FINDINGS <br /> Field observation, results of laboratory analysis of soil and'gr6und'1water samples and a discussion , <br /> of data collected during field work follows <br /> 3 1 STRATIGRAPHY I ' <br /> r <br /> Silty fine sand was encountered,in each bonng'at a depth of 15 feet bsg Silt, overlain by sand was <br /> ' encounterdd in the sample collected from a depth of 25 feet bsg In boring MW2 ` Clay was <br /> • encountered in the remainder of the samples collected The boring logs are included as Appendix <br /> I <br /> � Y <br /> 1 <br /> Advanced GeoEnvi ron mental,Inc <br /> l <br /> y , <br />