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.~_-- <br />== TerraMatrix <br />Engineering 8r Environmental Services <br />1475 Pine Grove Road • PO Box 77401® FtF C,~~~E~ <br />Steamboat Springs, Colorado 60477 <br />303-879-6260 • fax 303-879-9048 SAN ~ ~ 1995 <br />January 10, 1995 Ge0lo9Y <br />p'wision of iwnetats ~ <br />Mr. Randal Price <br />Division of Minerals and Geology <br />215 Centennial Building <br />1313 Sherman Street <br />Denver, CO 80203 <br />RE: Kerr Coal Company - 1994 Annual Hydrology Report -File No. C-80-006 <br />Mr. Price: <br />iii iiiiiiiiuiii iii <br /> <br />Enclosed are [wo copies of the Kerr Coal Company Annual Hydrology Report for the 1994 water year. <br />It presents the field and laboratory results of the monitoring program, along with graphical <br />representations of select parameters. <br />In response to the recommendations in your letter dated March 14, 1994, "RE: Kerr Coal Co., Marr <br />Strip Mine, 1992 and 1993 Annual Hydrologic Report Review", Kerr offers the following: <br />Recommendation <br />Check all well depths, casing condition, annulus condition annually and make sure all wells are <br />capped. This information should be submitted in the annual hydrologic report. If repair or <br />rehabilitation is necessary the mine should perform this as needed. <br />Response. Kerr initiated this program on April 6, 1994. The inspettion is documented on a <br />report form included in Section 8.0, Well Inspettion of the 1994 Annual Hydrology Report. <br />Recommendation <br />Field instruments should be calibrated on a regular basis. <br />Response. Mr. Mossman does calibrate the fieid instruments prior to conducing sampling. As <br />with all electronics, this does not always assure no problems. However, Kerr will continue to <br />calibrate the field instrument on a regular basis. <br />Recommendation <br />Elettrical conductivity should be adjusted to 25 degrees C and given as specific conduttance. <br />Response. The field instrument, Cole-Parmer Model 1491-63, used by Kerr to measure electrical <br />conductance is preadjusted at the factory to have a reference temperature of 20 degrees C. If <br />necessary, these values could be further adjusted, by hand, to 25 degrees C. <br />Steamboat Springs, CO • Denver, CO .Seattle, WA • Juneau, AK • Santiago, Chile SA <br />