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FROM PRRRGON <br /> <br />PARl1G <br />CONSUL <br />PHONE N0. 9703771880 OCT. 11 2001 S1:SSAM Pl <br />113 OAK PARK DRIVE, SUITE 110 <br />FORT COLLINS, COLORADO 80525 <br />FAX C O 1/ER S HEE T <br />DATE: <br />TO: <br />FROM: <br />Re: <br />cc: <br />October 11, 2001 <br />Kate Pickford/DMG <br />Scott A. Ruthertord, P.E. <br />Tmne: 11:45 AM <br />PHONE: <br />Fax: 303-832-8106 <br />PHONE: 970-377-1600 <br />Fax: 970-377-1880 <br />Aggregate Industries F Street Facility, Greeley, CO <br />PROJECT NUMBER: 1001018 <br />Connie Davis/Aggregate Industries FAX; 970-378-6856 <br />Number of pages including coves sheet: 1 <br />Message <br />Kate, attached is the estimate of the seepage velocity for the above-referenced site. The <br />seepage velocity estimates were based on the hydraulic conductivity published in <br />Colorado Groundwater Circular Na. 11; hydraulic gradients estimated for the site based <br />on the Septemher 19, 2001 piezometric surface; and a range of published effective <br />porosities. <br />As we discussed, installation of an additional groundwater monitoring well at the site Is <br />planned for the afternoon of Monday October 15, 2001. Please review the attached <br />Information and the Site Characterization Report and provide me with your input <br />regarding the proposed well location. Please call if you have any questions. <br />Seatl <br />