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CAMBRIA <br /> Waste Industries' Forward Landfill in Manteca, California for <br /> disposal <br /> Well Materials Wells MW-6 and MW-8 were constructed using four-inch <br /> diameter, Schedule 40 PVC casing with a screen slot size of <br /> 0 020-inch and#2112 Monterey sand <br /> Screened Interval Well MW-6 is screened from 45 to 65 fbg and well MW-8 is <br /> screened from 46 to 66 fbg Monitoring well construction <br /> details are presented on Table 1 and recorded on the exploratory <br /> boring logs (Appendix B) <br /> Well Development/Sampling Blaine developed and purged well MW-6 on November 27, 2000 <br /> and Sampled the well for the first time on November 30, 2000 <br /> Blaine developed and purged well MW-8 on March 12, 2001 <br /> and sampled the well initially on March 16, 2001 Blaine <br /> developed the wells using surge block agitation and pump <br /> . evacuation Blaine's field sheets, documenting the development <br /> and sampling events, are presented as Appendix E The <br /> sampling results have been submitted with Cambiia's quarterly <br /> groundwater monitoring reports <br /> Wellhead Survey Morrow Surveying of West Sacramento, California surveyed the <br /> top of casing elevations for wells MW-5, MW-6, and MW-8 <br /> relative to mean sea level during June 2001 (Appendix F) <br /> HYDROCARBON DISTRIBUTION IN SOIL <br /> No TPHg or benzene were detected in soil samples collected from any of the borings MTBE <br /> was detected (by EPA Method 8260B) in soil samples collected from boring SB-6 at <br /> concentrations ranging from 0 010 to 17 ppm at depths from 14 5 to 30 5 fbg, in SB-7 at 0 26 <br /> ppm at 20 fbg, and in SB-8 from 0 0090 to 0 037 ppm from 25 to 35 5 fbg <br /> The soil chemical analytical data are summarized in Table 2 and the TPHg, benzene, and MTBE <br /> concentrations are presented on Figure 3 Laboratory analytical data are included in <br /> Appendix D <br /> • <br /> 1346 5 <br />