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~ RANT <br />ENVIRONMENTAL, INC: <br />June 22, 2000 <br />' Mr. Paul Banks <br />Banks and Gesso <br />' 720 Kipling St, Suite 117 <br />Lakewood,.Colorado 80215 <br />' Subject: Groundwater Analytical Results <br />Dear Mr. Banks: <br />' Grant Environmental, Ine. (Grant) compared the Speer Property groundwater analytical <br />results to Colorado drinking water standards (Title 25-1 CRS, as amended). The analytical <br />results and regulatory standards are presented in the attached table. <br />Five wells were sampled for pesticides and herbicides in groundwater. None of the <br />' samples analyzed exceed Colorado drinking water standards. Only two compounds were <br />detected that have. drinking water standards (endrin and methoxychlor); however, these <br />detections are well below the standards. Endrin was detected in well MW-4AS at a <br />' concentration of 0.15 micrograms per liter (ug/I). The drinking water standard for endrin is 2_0 <br />ug/I. Methoxychlor was tentatively identified in samples from wells MW-4AS and MW-5AS at <br />concentrations of 0.055 ug/I and 0.059 ug/I, respectively. These concentrations are nearly five <br />orders of magnitude below tho drinking water standard of 40.0 u I. The analytical laboratory <br />' - qualified the methoxychlor detections as "estimated" values because the concentrations fell <br />between the analytical reporting limits and the method detection limits. <br />' Several other compounds were detected in the groundwater from wells MW-4AS and <br />MW-5AS; however, these compounds do not have drinking water standards. Most of these <br />detections were also estimated and qualified by the analytical laboratory. <br />' Based on the wells sampled and the analytical results, there does not appear to be an <br />areally-extensive groundwater quality impact at the Speer Property. <br />Please call us at (303) 790-7400 if you have questions. Thank you for the opportunity to <br />provide this service to you. <br />Sincerely, <br />Grant Environmental <br />' ~~"'"s O' ~~ <br />' Patrick F. Breen <br />Senior Hydrogeologist <br />'Richard L. Henry <br />Chief Hydrogeologist <br />a ac en <br />' 12150 East Brlarwood Ave., Suite 200, Englewood, Colorado 80112 <br />(303) 790-7400 FAX (303) 799-6993 <br />