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1 <br /> • 24 June 2005 <br /> AGE-NC Project No 95-0103 <br /> ' Page 3 of 12 <br /> ' tertiary-butyl ether(MTBE) in accordance with EPA Method 8021 or 8260B <br /> In addition, the effluent an sample were analyzed for <br /> ' •• Total petroleum hydrocarbons quantified as diesel TPH-d by EPA Method 8015 Modified, <br /> ' • Ethylene-dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) In accordance with EPA <br /> Method 8260B (24 February 2005 only), <br /> ' Volatile organic compounds(VOCs)with fuel additives tertiary butanol(TBA),di-isopropyl ; <br /> ether (DIPE), ethyl tertiary-butyl ether (ETBE) and tertiary-amyl methyl ether (TAME) in <br /> accordance with EPA Method 8260B in accordance with EPA Method 624 (24 February <br /> 2005 only), <br /> • Semi-volatile organic compounds (SVOCs) in accordance with EPA Method 625 (24 <br /> February 2005 only), <br /> • Leaking Underground Fuel Tank(LUFT)metals and copper in accordance with EPA Method <br /> 6010B (24 February 2005 only), <br /> '�. • pH in accordance with EPA Method 150 1 <br /> ' 23 QUARTERLY GROUND WATER MONITORING AND SAMPLING <br /> As direct by the EHD by letter dated 18 April 2005, ground water monitoring and sampling were <br /> performed on monitoring wells MW-i through MW-6, vapor wells VE-1, VE-6 and ground water <br /> extraction wells EW-1, EW-2 and EW-3 on 10 and 11 May 2005 <br /> ' 2 3 1 Low-Flow Well Monitoring and Ground Water Sample Collection and Analysis <br /> On 10 May 2005 a Solinst water level meter was used to measure the depth to ground monitoring <br /> ' water in the wells relative to the tops of the well casings (Table 1) Subsequently,the ground water <br /> elevation in each well was calculated by subtracting the measured depth to ground water from the <br /> surveyed casing elevation After water levels were measured, ground water was purged at a rate of <br /> ' approximately 500-m1 per minute from ten wells utilizing low-flow technology A peristaltic pump <br /> and disposable tubing was lower to a depth of 20 feet below casing and ground water purged or <br /> evacuated from the following wells MW-1 trough MW-5, EW-1 through EW-3 and vapor wells <br /> ' VE-1 and VE-6 While purging the ground water was continually monitored for oxidation reduction <br /> potential (OPR), dissolved oxygen (DO)content,pH, conductivity and water temperature within a <br /> ��• 500-m1 flow cell which housed the YSI 556 multi parameter meter, which electronically collected ' <br /> Advanced GeoEnvironmental,Inc <br /> w <br />