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� CAMBRIA <br /> Groundwater Analyses Groundwater samples were analyzed for TPHg, BTEX, MTBE, <br /> fuel oxygenates (MTBE, TAME, TBA, DIPE, and ETBE) by <br /> EPA Method 8260B <br /> Soil Disposal• Approximately 178 tons of soil were generated during field <br /> activities, temporarily stored onsite, and covered with plastic <br /> sheeting The soil stockpile was sampled and profiled for <br /> disposal (laboratory data in Appendix E) On <br /> November 20, 2001, Manley and Sons Trucking, Inc of <br /> Sacramento, California transported the soil to Allied Waste <br /> ' 4 Industries' Forward Landfill in Manteca, California for disposal <br /> Well Materials Wells MW-10 and MW-11 are constructed using two-inch <br /> diameter, Schedule 40 PVC casing with a screen slot size of <br /> 0 020-inch and#2/12 Monterey sand <br /> Screened Interval• Well MW-10 is screened from 30 to 45 fbg, and well MW-11 is <br /> screened from 25 to 45 fbg Monitoring well construction <br /> details are presented on Table 1 and on the exploratory boring <br /> logs (Appendix C) <br /> Well Development/Sampling Blaine developed and purged the new wells on <br /> December 7, 2001 Blaine developed the wells using surge <br /> block agitation and pump evacuation Blaine sampled the new <br /> wells and the existing site wells on December 10, 2001 <br /> Blaine's field sheets, documenting the development and <br /> sampling events, are included in Appendix D <br /> Wellhead Survey Virgil Chavez Land Surveying of Vallejo, California surveyed <br /> the top of casing elevations for all site wells relative to mean sea <br /> level on November 30, 2001 (Appendix F) <br /> Groundwater Flow Direction Cambria prepared a groundwater contour map using the water <br /> level measurement data from wells MW-1 through MW-7, <br /> MW-10, and MW-11 collected on December 10, 2001 <br /> (Figure 3) Groundwater flow direction is easterly this quarter <br /> • with an approximate hydraulic gradient of 0 003 <br /> 0854 5 <br />