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' Former Manna Pro Site Page 4 Quarterly Groundwater Monitoring Report Project No 207 2 February 6, 2004 i ' analytical laboratory) All samples were checked for head space bubbles, labeled, inserted into foam holders and placed in an ice chest cooled to 4°C for transport to the laboratory ' Gasoline contaminated purge & ranseate 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 lie compounds were found in water samples from 4 of the 6 wells that were sampled 2.3 Field Data The field data for this groundwater monitoring event are summarized in Table ' 1 The level of groundwater has risen several inches since the last groundwater monitoring event completed on September 23rd, 2003 As shown ' in Figure 3, the gradient is consistent with its historical norms with a northeast 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 0018 ft/ft on a bearing of N580E This compares with a gradient and bearing of 0 0020 ft/ft on a bearing of N43,)E from the June 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 Purge water from the prior event was collected on r2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 Modesto, CA 95356 Fax (209) 569-0293