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CAMBRIA <br /> tested for fuel oxygenates (TBA, MTBE, DIPE, ETBE, <br /> TAME, and 1,2-DCA) by EPA Method 8260A or 8260B <br /> Soil Disposal Soil cuttings from the investigation were placed on and <br /> covered with plastic sheeting, and profiled for disposal <br /> Manley and Sons Trucking transported the soil on December <br /> 30, 1999 to Forward, Inc 's Manteca, California landfill for <br /> final disposal <br /> Well Materials Well S-4 was constructed using four-inch diameter Schedule 40 <br /> PVC casing with a screen slot size of 0 020 inch and 2112 <br /> Lonestar Sand <br /> Screened Interval The screened interval in well S-4 is from approximately 37 to <br /> 57 fbg Monitoring well construction details are presented on <br /> the exploratory boring log and summarized in Table 1 <br /> • Well Development/Sampling Blaine Tech Services, Inc of San Jose, California will develop <br /> and purge well S-4 as part of the first quarter 2000 sampling <br /> event Blaine's groundwater monitoring and well <br /> development report, and groundwater analytical results will be <br /> presented in our first quarter 2000 Quarterly Monitoring <br /> Report <br /> Wellhead Survey Virgil Chavez Land Surveying, California, licensed land <br /> surveyor # 6323, surveyed the top of casing elevations for, <br /> and the locations of wells S-1 through S-4 on January 17, <br /> 1999 The surveying report is included as Appendix C <br /> HYDROCARBON DISTRIBUTION IN SOIL <br /> Boring SB-4 was drilled adjacent to the northern dispenser island, which is suspected of being <br /> the source area of petroleum hydrocarbons in soil and groundwater at this site Soil samples <br /> collected were collected from this boring from 65 to 110 fbg to evaluate the vertical extent <br /> of petroleum hydrocarbons in the soil Since previous borings in this area had characterized <br /> soil from the surface to 65 fbg, soil samples from boring SB-4 were not collected above this <br /> . depth <br /> 0797 5 <br />