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air was "turned off' to the southern portion of the system and has been providing air only <br /> to MW-4, MW-5, MW-14, VW-4, VW-5 and VW-6 since February 1994. The layout of the <br /> blower piping is depicted in Figure 3. <br /> 2.5 Bioremediation Pilot Test <br /> On February 2, 1994, a total of five wells were inoculated with hydrocarbon-consuming <br /> bacteria by representatives of GeoAudit. Wells MW-4, VW-1, VW-4, VW-5 and VW-6 were <br /> inoculated with 70 to 180 gallons of inoculum, depending upon well diameter and depth. In <br /> accordance with an agreement with the CVRWQCB, the wells were chosen to prevent <br /> impact to water during the pilot test. <br /> t was scheduled to last a period of two months, February and March 1994. Data <br /> The pilot test p rY <br /> and results for the first month of the Pilot Test (February) was reported in a "Monthly <br /> Monitoring Report" dated March 11, 1994 and submitted to the CVRWQCB. Data and <br /> results for the second month of the Pilot Test will reported in a separate monthly <br /> monitoring report. <br /> 3.0 PROCEDURES <br /> 3.1 Groundwater Monitoring <br /> According to the C & A order, annual monitoring and sampling of all monitoring wells at <br /> the site shall occur during the first calender quarter of each year. On March 28, 1994, <br /> I representatives of GeoAudit performed annual quarterly monitoring procedures at the site. <br /> Water depths were measured in all wells. Water was purged and groundwater samples were <br /> collected from all wells with adequate water, in accordance with the C & A order. <br />' 3.2 Monitoring Well Purge Procedures <br /> iA solinst water level meter was used to measure the groundwater depth in each monitoring <br /> well (Table 1). An attempt was then made to purge each well of a minimum of three well <br /> volumes. Ten monitoring wells (MW-6 through MW-14 and EW-1) had sufficient volumes <br /> of water to be purged. Five of the wells (MW-1 through MW-5) were either dry or purged <br /> dry within one gallon. <br />' The wells were purged using a stainless steel bailer. Well EW-1 was purged using a 2" <br /> submersible pump. Temperature, pH and conductivity of the purge water were measured <br /> at approximately 2-gallon intervals (10-gallon intervals for EW-1) using Orion pH, <br /> temperature and conductivity meters (Table 2). The water was stored in DOT-approved <br /> drums and stored on-site. <br /> 1-33/4-PW1DM QR! 6 � <br /> r <br />