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' 23 July 2004 <br /> . AGE-NC Project No 99-0624 <br />' Page 3 of 8 1 <br />' 2 14 Laboratory Analyses of Soil <br /> Selected soil samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br />' Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl tertiary-butyl ether <br /> (MTBE) in accordance with EPA Method 8260,and <br />' The fuel additives di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), MTBE, <br /> tertiary-amyl methyl ether(TAME), tertiary butanol (TBA), 1,2-dichloroethane(1,2-DCA) <br /> and 1,2-dibromoethane (EDB) by EPA Method 8260 Modified <br /> 1 <br />' 2 1 5 Monitoring Well Development <br /> On 22 April 2004, monitoring well MW5 was developed utilizing a Waterra inertia pump with a <br />' • hose bailer Ground water was purged from the monitoring well until ground water was visually <br /> sediment free, approximately 20 gallons of water were removed from the well Purged ground water <br /> was containerized in properly labeled DOT-approved model 17H 55-gallon drums and stored on-sate <br />' Field sheets and data are included in Appendix C <br />' 2 1 6 Well Head Survey <br /> On 08 July 2004,a California state-licensed survey engineer from Baumbach&Piazza,Inc surveyed <br />' the location and elevation of the top of the well casings of monitoring wells MW 1 through MW7 <br /> Elevations were surveyed to the nearest 0 01-foot relative to City of Lodi benchmark 4563,surveyed <br /> at 7 56 feet above mean sea level (MSL) Coordinate locations (x and y) of well locations were <br />' calculated to the nearest 0 1-foot using coordinate datum NAVD 83 (1986)from global positioning <br /> satellite(GPS) observations The results of the monitoring well survey are reported in Table 1 The <br />' surveying report (Baumbach & Piazza, Inc ) is presented in Appendix E <br />' 2 17 Equipment Decontamination <br /> All augers used were cleaned prior to advancement in each boring location The sampling equipment <br />' was washed in an Alconox solution and rinsed with water prior to each sampling run to avoid cross- <br /> contamination <br />' Advanced GeoEnvironmental,Inc <br />