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C A M B R I A tertiary butyl ether, and tertiary butanol [TBA]), and lead scavengers (1, 2-dichloroethane and ethylene dibromide) by EPA Method 8260B Grab groundwater samples from bonngs B-1 through B-7 were also analyzed for methanol and ethanol Soil Disposal: Soil generated during field activities was stored onsite on, and covered with, plastic sheeting The soil stockpile was sampled and profiled for disposal (laboratory data in Appendix D) On June 8, 2004, Manley and Sons Trucking, Inc of Sacramento, California transported 2 55 tons of soil to Allied Waste Industries' Forward Landfill in Manteca, California for disposal Well Materials The monitoring wells were constructed using 2-inch diameter, Schedule 40 PVC casing with a 0 020-inch screen slot size and Monterey #2112 sand-pack Well construction details are presented on Table 1 and on the logs in Appendix B . Screened Intervals• The screened intervals for wells MW-1 through MW-5 extend from 15 to 35 fbg Well Development/Sampling: Blame gauged and developed the new wells on June 4, 2004 All sit wells were then gauged, purged, and sampled on June 2004 Blaine's groundwater monitoring and well development report is presented in Appendix C Wellhead Survey• Virgil Chavez Land Surveying (licensed land surveyor No 6323) of Vallejo, California surveyed the top of casing elevations for wells MW-1 through MW-5 relative to mean sea levelandsurveyed the wells' latitude and longitude on June Ar, 2004 (Appendix E) s 11\15N� Groundwater Flow Direction: Cambria prepared a groundwater contour map using the water level measurement data collected on June 22, 2004 from the site wells (Figure 3) Groundwater flow direction is generally towards the east at an approximate hydraulic gradient of 0 01 Groundwater Elevations: Static groundwater elevations gauged on June 22, 2004 ranged . from 5 62 to 6 20 feet above mean sea level 1660 4