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There are several other wells located in the area surrounding these four wells that can <br /> be used for analysis. Columbini Irrigation wells #1 and 3, monitor well MW-446, and <br /> Columbini Domestic well #1 are in the vicinity of Columbini Irrigation well #2 (Figure <br /> 1). Columbini Domestic well #3, monitor well MW-443, and 5116 Domestic are in the <br /> vicinity of 5116 Irrigation. Solari Domestic and Solari Irrigation are in the vicinity of <br /> Main Street Domestic and Irrigation, as well as several monitoring wells (Figure 1). <br /> Groundwater quality hydrographs of these four wells indicate that the concentrations <br /> of total dissolved chromium generally have been less than detection limits for the past 5 <br /> years (Figures D-138, 140, 142, and 144). Only Main Street Irrigation had a <br /> concentration above the reporting limit over the past 5 years. This occurred in July 2000, <br /> when the reporting limit for total dissolved chromium was changed from 10 micrograms <br /> per liter(µgh) to 1 (µg/1). <br /> Due to the existing network of monitoring wells in the area around these wells, the <br /> lack of cooperation by the owners of the irrigation wells, the presence of inactive or <br /> inoperative wells, and the groundwater quality data, Dudek is asking that these four wells <br /> be dropped from future sampling events. <br /> If you have any questions regarding this matter please contact Peter Quinlan or myself at <br /> (760) 942-5147. <br /> Dudek & Associates, In . <br /> Peter i n, Princi <br /> KayvIlkhanipour, H ogeologist. <br /> cc: Dave Lieb (Marley) <br /> Anthony Calestini (Marley) <br /> Dan Thompson (Marley, Kansas ofc.) <br /> Harlin Knoll (San Joaquin Co. Public Health Services) <br /> Mr. Emmanuel K.A. Mensah (Califonia EPA) <br /> Donna Keller(GeoAnalytical) <br /> Lily Herskovitz(H-3-2) <br /> H:\HazWaste\Hazwaste\Marley\Well Letter 5-25-01.doc <br />