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t'amoed Lvmbcr MfriKl CA <br /> Pate 2 <br /> The water to MW I was Cloudy with blackish-gra) suspended material There was a slight gas odor,but not <br /> as strong as MW I The well was bailed for approximately 45 minutes until only a fcw inches of water wcre <br /> retrieved in the bailer The water temperature was measured to be 7I'f at 1520 <br /> The water from writ MW-1 was sampled at 1645 The water %4as cloudy with blackish gray suspended <br /> maicnal The sample were placed in a cooler With blue ice immediately following sampling <br /> All of the samples wcre labelled discretely at the time of sampling and kept in a cooler vAth ice 0%vrnight until <br /> shipping the laboratory via rcderal txpress <br /> ANALYTICAL RESULTS <br /> Laboratory analyses were completed by North Creel. Analytical in Bothell, Washington, <br /> which is accredited by California DHS (FLAP 1267) Anal}tical data are included as <br /> Appendix A to this letter report, and indicate that significant contamination remains at <br /> this property <br /> DISCUSSION <br /> Water level readings qualify earlier readings completed in 1989, indicating the general <br /> groundwater gradient to be to a northeasterly direction (see notes above and <br /> Appendix C) Overall water level appears to have dropped some 6 feet which is likely <br /> partially due to the earlier, 1989, measurements being taken from ground level rather <br /> 1 than top of well casing and partially due to the drought conditions over the last few <br /> years The site itself is level <br /> 1 Water quality in the wells appears to be contaminated in a generally comparable manner <br /> to the 1989 monitoring event with exception of MW-3, which has deteriorated <br /> significantly in quality (see Appendices A and B) <br /> Increase <br /> in the groundwater contamination at the location of MW-3 Indicates some <br /> upgradient "mounding", presuming the source to be located prommal to MW-1 <br /> As a result of this information, we suggest that SRK's "Proposed Subsurface Investigation <br /> dated August 1991 and amended by letter dated September 30, 1991 be further amended to <br /> include a borehole located west of existing monitor well MW-3 at the fence line, and that this <br /> additional borehole be developed as a monitor well if gross contamination is identified <br /> 1 We await your review and response to this Iciter report prior to proceeding with this <br /> investigation Please do not hesitate to call if you have any questions <br /> With regards, <br /> STEEFFEN ROBERTSON AND KIRSTEN (U S ) INC <br /> ' Rob Gwilym, C P G <br /> Principal, Senior Environmental Geoscientist <br /> RG/sal <br /> Enclosures <br /> cc Ann Arney - Dallas <br /> nw.ria.., ,•. slerren <br /> Robcnson anJ Kirsic• <br />