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January 29, 1997 <br /> <br />JAN 3 Q 199i <br />Mr. James C. Stevens <br />Division of Minerals and Geology _ .~ : ,,.,,,,~~gy <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Re: Costilla Landfill Pit (Permit M-80-233), Apparent failure to comply with permit, i.e. <br />groundwater monitoring requirements. <br />Dear Mr. Stevens: <br />This letter is in response to your correspondence of January 13, 1997 regarding the aforementioned <br />facility. Within this document (per previous reports from Greystone), the condition of wells MW2 <br />and MW3 is reported as dry during the third and fourth quarter of 1996. Within your correspondence <br />the request is made for a remedial action plan that assures that water samples will be obtained during <br />the next quarterly sampling period. This activity is currently scheduled for March of this year. <br />In compliance with this request, Greystone proposes that the wells will be assessed in both February <br />and March to determine the presence of water in these wells. If water is available for sampling, then <br />these wells will be sampled. If water is not determined to be present, then an alternative course of <br />action will be determined. Please note that when water was available in these wells, concentrations <br />of constituents tested for were not substantially above the levels determined for the upgradient <br />(background) well. <br />Greystone appreciates the cooperation of the CDMG in this matter. Should you have any questions, <br />or require further information, please do not hesitate to contact me at (303)850-0930. <br />Sincerely, <br />~~l ~~,~ <br />Marc E. Sydnor <br />Senior Hydrogeologist <br />MS/ms <br />cc: Robert Vasquez, Costilla County <br />nA~ <br />a~ (~a'~ °~~ . <br />,~~~~~ <br />5990 Greenwood Plaza Blvd. Suite 250 Englewood, CO 80111 <br />(303) 850-0930 Fax (303) 721-9298 <br /> <br />