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1 01 April 2004 <br /> AGE-NC Project No 02-0950 <br /> tPage 3 of 9 <br />' • Total lead in accordance with EPA Method 6010B <br /> One grab ground water sample was collected from boring B4 (B4-H20) and analyzed for <br />' • TPH-g and TPH-d in accordance with EPA Method 8015 Modified, and <br /> • BTEX and fuel additives by EPA Method 8260 Modified <br /> 2 1 5 Monitoring Well Development <br />' On 17 October 2003, monitoring wells MW-1 through MW-3 were developed utilizing a Waterra <br /> inertia pump with a hose bailer Ground water was purged from each monitoring well until ground <br />' water was visually sediment free, approximately 25 gallons of water were removed from each well <br /> Purged ground water was containerized in properly labeled DOT-approved model 17H 55-gallon <br />' drums and was stored on-site Field sheets and data are included in Appendix C <br /> I . 2 1 6 Well Head Survey <br /> On 29 October 2003, a California state-licensed survey engineer from Morrow Surveying surveyed <br />' the location and elevation of monitoring wells MW-1 through MW-3, the location was surveyed to <br /> the nearest 0 1 foot relative to coordinate datum NAVD 83 (1986), and the elevation at the top of <br /> the well casing was surveyed to the nearest 0 01-foot relative to Stockton benchmark #102, at an <br /> elevation 7 56 feet above mean sea level (MSL) The results of the monitoring well survey are <br /> contained in Table 1 The surveying report (Morrow Surveying) is presented in Appendix E <br /> 2 1 7 Equipment Decontamination and Borehole Abandonment <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 At the conclusion of soil boring activities, boring B4 was permanently sealed to <br /> Iprevent vertical migration of contaminants,under EHD oversight,the borehole was backfilled with <br /> cement slurry from the total depth to surface grade <br /> 2 2MONITORIN UARTERLY WELL <br /> Q G PROCEDURES <br /> The initial quarterly ground water monitoring event was performed on 21 October 2003, ground <br /> • water monitoring was performed on monitoring wells MW-1 through MW-3 <br /> I <br /> Advanced GeoEnvironmental,Inc <br />