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C A M B R I A above the bentonite A traffic rated vault box was set in concrete at grade to protect the well head i Well Naming Convention The groundwater monitoring wells installed during this investigation were given well names that are not typical for monitoring wells Since these wells have deeper screened intervals and were installed in groups, we added a number to the i end of the well name to differentiate these wells from each other This extra number indicates the depth of the bottom of the screened interval For example well MW-11-82 is part of the MW-11 well cluster and the bottom of its screened interval is 82 fbg Screened Interval: Each well installed during this phase of field work had a ten foot screened interval In general, two screened intervals (70 to 80 fbg and 110 to 120 fbg) were installed during this investigation The actual screened intervals for each well varied and are shown in Table 1 The exploratory boring logs are presented in Appendix B Well Development/Sampling. Blame Tech Services, Inc (Blaine) of San Jose, California developed the new wells on September 24, 2002 Blaine developed wells MW-19-81 and MW-19-120 using surge block agitation and pump evacuation The CMT wells could not be surged due to the small casing size, therefore development consisted of purging only Blaine's field sheets, documenting the development and sampling events, are included in Appendix D Wellhead Survey: Virgil Chavez Land Surveying of Vallejo, California surveyed the elevation and location of the pre-existing wells on February 20, 2002 This survey was performed to comply with the State of California Geotracker requirements The elevations and locations of the new wells were surveyed on September 20, 2002 The surveyor's report for both surveying events is included in Appendix E 1399 4