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MOLEN & ASSOCIATES, 4 <br />ENVIRONMENTAL CONSULTANTS A Z <br />2090 E. 104th Ave., Suite 205 ? Thornton, Colorado 80233 <br />Office 303-450-1600 ? Fax 303-452-4515 <br />October 14, 2008 <br />2? <br /> <br />Mr. Jared Ebert <br />Department of Natural Resources <br />Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Divisica c... <br />n'r'q _ <br />Re: Postponing Aggregate DIMP Sampling Program for Jeronimus Lake Property <br />Dear Mr. Ebert: <br />In June 2008, Molen & Associates, LLC started the DIMP (diisopropyl methylphosphonate) sampling <br />program of the Jeronimus Lake and Topper Property according to the approved sampling protocols. <br />Three sampling events were completed for the?ronimus property also known as Cooley Reservoir & <br />Fulton Wildlife Area Pit, Permit No. M-1999-034, AM-01. One sampling event was completed for the <br />Topper Well as described in the sampling program. Recently Aggregate Industries has decided to curb <br />their mining activities on the Jeronimus Lake property and plans to postpone the sampling program. <br />This letter describes the three sampling activities, the analytical results and the postponement. <br />The three sampling events of Jeronimus Lake were taken from the water pump pontoon. The approved <br />Lake Sampling Protocol was used to do the sampling. Sample bottles were obtained from the <br />Colorado Department of Public Health and Environment Laboratory and Radiation Services Division <br />and delivered back to the lab within 24 hours after the sampling. Chain of custody procedures were <br />followed along with proper chilling and labeling of samples. All three Jeronimus Lake samples had <br />analytical results below the method detection limit (MDL) of 1.0 ug/L and well below the maximum <br />contaminate limit (MCL) of 600 ug/L. <br />One sampling event included the Topper Well. The Well Sampling Protocol for well #32883 was used <br />to do the sampling. The well was allowed to purge by engaging the pump for the appropriate time <br />prior to sampling. A representative of the Topper family was there during the sampling event and <br />engaging the pump. The well was surged to obtain the sampling after purging. Analysis indicates that <br />DIMP was not detected above the MDL of 1.0 ug/L.