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1 <br />1 <br />' Mary M. Harnett <br />Land and Resource Manager <br />Western Mobile Northern/Lafarge <br />1800 N. Taft Hill Road <br />I P.O. Box 2187 <br />Fort Collins, CO 80522 <br />Re: Home Office Well Monitoring Protocol <br />Project No. 864-050 <br /> <br /> <br />May 31, 2001 <br />1 Dear Mary, <br />We are pleased to present this well monitoring protocol for your review and use. We <br />1 have produced a document that hopefully will meet your needs for creating pertinent, <br />timely information regarding groundwater levels and neighborhood concerns in the <br />vicinity of the North Taft Hill Expansion site. To summarize, the protocol creates the <br />following process: <br />• Lafarge will take measurements in 11 wells in the vicinity of the site, as shown on <br />the enclosed map. <br />' • Measurements will begin immediately and be taken through the life of the <br />operation known as the North Taft Hill Expansion. <br />• Some wells may require a short liner or cap to create a consistent measuring <br />'basis. <br />• Careful record keeping and consistent field measurements on a monthly basis <br />are necessary for creating a set of data that is defensible. <br />• Some data analysis, following procedures outlined in the protocol, will be <br />necessary to determine results from the measurements. <br />• Brief annual reports must be prepared and mailed to neighbors who own wells <br />that are being monitored. Other neighbors or regulators may request being <br />added to the mailing list. <br />I The information generated by this process must be incorporated into management <br />decision making for the protocol to be of value. A summary of this proposed decision <br />tree is as follows: <br />' If no significant change in groundwater levels is found (as determined by data <br />analysis outlined in the protocol), then Lafarge needs to take no action. <br />• If significant change in groundwater levels is found, and qualitative complaints <br />' are made by landowners within the "zone of influence" (as shown on the well <br />location map), then Lafarge must provide some sort of mitigation for those <br />landowners within the "zone of influence" of the affected well. <br />TSTy ~ lding D <br />Fart Callinr, CO 80525 <br />Consulting Engineers (970) 226-0557 <br />Melro (J03) 595-9103 <br />Fax (970) 226-0204 <br />Email Inro~ fs[inc.com <br />www.ts[inc.com <br />