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GEOMATRIX <br /> portion of a temporary equipment access ramp The ramp was constructed for equipment used to <br /> refurbish two anhydrous ammonia storage tanks at a nearby facility (see WGR letter in <br /> Geomatrix, 2004) On February 26, 2003, wells MW3-2, MW3-5, MW3-6, MW3-1, and MW3- <br /> 4 (Figure 2) were purged and sampled by WGR in that order Depth to groundwater was <br /> measured in the site monitoring wells before purging Prior to sampling each well, the presence <br /> of separate-phase petroleum hydrocarbon was assessed with a disposable bailer About 75 to <br /> 100 gallons of water was purged from each well using a dedicated stinger and vacuum truck <br /> Each dedicated stinger is stored on the site in its own sealed plastic bag Suction on the vacuum <br /> truck lane remains on during purging and while making and breaking the connection with the <br />' individual stingers <br /> After purging the initial 75 to 100 gallons from each well, a new, clean disposable bailer was <br /> used to collect water from each well for measurement of field parameters Measured field <br /> parameters (electric conductivity, pH, temperature, dissolved oxygen, and oxidation reduction <br />' potential) were recorded on field data sheets (Appendix A) After the first set of field parameters <br /> was collected and water levels had recovered, an additional 50 gallons of water was purged with <br /> the dedicated stinger New clean disposable bailers were used to collect groundwater samples <br /> for field parameters and laboratory analysis of total petroleum hydrocarbons quantified as <br /> gasoline (TPHg) and benzene, toluene, ethylbenzene, and xylenes (BTEX) <br /> Groundwater samples collected by WGR were preserved and transported under chain-of-custody <br /> (Appendix B) procedures to Precision Enviro-Tech Analytical Laboratory (PET) in Stockton, <br /> California, a state-certified laboratory The groundwater samples from the five sampled site <br /> monitoring wells were analyzed by PET for TPHg and BTEX using U S Environmental <br /> 1 Protection Agency Method 8260B <br />' 3.0 MONITORING RESULTS <br /> First quarter 2004 monitoring results are discussed in the following sections <br /> 3.1 GROUNDWATER ELEVATION,FLOW DIRECTION,AND GRADIENTS <br /> Groundwater elevation data from February 26, 2004 (Table 1), were used to construct <br /> potentiometric contours on Figure 3 No floating product was reported in any of the site wells <br /> Groundwater levels have risen about 2 to 3 feet in the site monitoring wells since fourth quarter <br /> 2003 <br /> 2 <br /> 11 PRO]EMN6000s\6437 00016437 19 doe <br />