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' Bless Environmental Management Inc U-Haul#709 50 002-70954-04 Groundwater Monitoring Report 01/23/03 3 0 GROUNDWATER MONITORING PROGRAM The groundwater monitoring program discussed below includes one monitoring event conducted in September 2002 The measurement and sampling methods employed throughout the groundwater monitoring event are discussed in the following sections 3 1 GROUNDWATER MEASUREMENTS—SEPTEMBER 2002 On September 2 p 3, 2002, Bles Environmental measured the depth to groundwater in 18 of the 25 ' groundwater monitor well casings associated with the site The "A" casings did not contain water and thus were not measured Groundwater levels in the "B" and "C" well casings were measured from a surveyed point on the top of the monitoring well casing to the groundwater surface All water levels were measured to the nearest hundredth of a foot (0 01 ft) using a Heron electronic water-level sounder The water level depth and time of measurement were recorded on a standard field data sheet The original field data sheets for this monitoring event are included in Appendix A and presented alongside previous monitoring data in Table 2 Groundwater depth measurements were performed in accordance with Blaes Environmental groundwater monitoring procedures presented in Appendix B Groundwater depths recorded on September 23, 2002, ranged from approximately 59 84 feet below top of casing (btoc) in well MW-7C to approximately 62 98 feet btoc in well MW-6C Groundwater elevations ranged from approximately 41 10 feet below mean sea level in well MW-8A to approximately 43 28 feet below mean sea level in well MW-3B (Table 2) Free-phase hydrocarbons were observed in monitor well MW-3B during collection of groundwater level measurements As a result, MW-3 was not sampled during this groundwater monitoring event Other observations collected during groundwater ' monitoring activities are presented on the field data sheet included in Appendix A ' Depth-to-water measurements from the "B" and "C" well casings were used to create groundwater condition maps showing the groundwater flow direction across the site (Figures 3 and 4, respectively) 6