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Former Manna Pro SitE Page 4 Quarterly Groundwater Monitoring Report ' Project No 207 2 February 15, 2006 r labeled, inserted into foam holders and placed in an ice chest cooled to 4°C for transport to the laboratory ' Gasoline contaminated purge & rinseate water generated during the activities described above was stored in poly drums located on the site American Valley Environmental will remove this material prior to the next scheduled depth to water measuring event 2.2 Groundwater Sample Analyses Groundwater samples were analyzed as follows ' • Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 8015(m) ' • Benzene, Toluene, Ethylbenzene, and Xylene (BTEX) by EPA method 602 The detection limits are included in the summary analytical data table; (Table 1) ' Detectable levels of gasoline range petroleum hydrocarbons and/or BTEX compounds were found in samples from 5 of the 7 samples ' 2.3 Field Data ' The field data for this groundwater monitoring event are summarized in Table 1 The level of groundwater has changed only slightly since the last groundwater monitoring event completed on September 19, 2005 As shown in ' Figure 3, the gradient is consistent with its historical norms with a northeast i bearing of flow ' Based on the field data obtained in this monitoring event, the overall groundwater gradient and bearing of flow as determined by a 3-point ' calculation from wells MW-4, MW-8 and MW-9 is 0 0020 ft/ft on a bearing of N35oE This compares with a gradient and bearing of 0 0028 ft/ft on a bearing of N67,, E from the September monitoring event ' 2.4 Waste Disposal ' Purge water from this monitoring event was temporarily stored in 55-gallon drums on the site The waste water will be removed for recycling prior to the next monitoring event On December 14, 2005 Valley Waste Oil removed the water from the prior event for recycling A photocopy of the manifest is . attached as Appendix C ' 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 Modesto, CA 95356 Fax (209) 569-0293 I