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CAMBRIA <br /> Circumslot PVC casing All wells were constructed with a <br /> screen slot size of 0 020-inch and#2/12 Monterey sand <br /> Screened Interval. Wells MW-4, MW-5, P-1, and P-2 are screened from 48 to <br /> 63 fbg, and wells MW-6 and MW-7 are screened from 45 to <br /> 60 fbg and 47 to 62 fbg, respectively Monitoring well <br /> construction details are presented on Table 1 and recorded on <br /> the exploratory boring logs (Appendix B) <br /> i <br /> Well Development/Sampling• Blaine developed and purged wells MW-4 through MW-7, P-1, <br /> and P-2 on September 16, 2002 and sampled all site wells on <br /> September 19, 2002 Blame developed the wells using surge <br /> block agitation and pump evacuation Blaine's groundwater <br /> monitoring and well development report, which includes field <br /> sheets, is presented as Appendix C <br /> I <br /> Wellhead Survey. Virgil Chavez Land Surveying (licensed land surveyor <br /> No 6323) of Vallejo, California surveyed the top of casing <br /> elevations for wells MW4 through MW-7, P-1, and P-2 relative <br /> to mean sea level and surveyed the well's latitude and longitude <br /> on September 20, 2002 (Appendix E) <br /> I <br /> Groundwater Flow Direction: Cambria evaluated water-level measurement data from <br /> September 19, 2002 and prepared a groundwater flow direction <br /> table (Table 2) and a groundwater contour map including a rose <br /> diagram (Figure 3) Groundwater flow direction is <br /> predonunantly to the east-southeast this quarter with a hydraulic <br /> gradient ranging from 0 009 to 0 0143 <br /> Hydrocarbon Distribution in Soil <br /> No TPHg, BTEX, or fuel oxygenates (including MTBE) were detected in soil samples collected <br /> from well borings MW-5 through MW-7 No soil samples were analyzed from well boring <br /> MW-4, because it is located adjacent to boring SB-3, where soil samples have already been <br /> collected and analyzed <br /> 0955 7 <br />