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Whetstone, <br />APPENDIX A <br />STANDARD OPERATING PROCEDURE <br />(SOP) FOR OPERATION AND <br />CALIBRATION OF FIELD WATER <br />QUALITY INSTRUMENTS: <br />THERMOMETER, pH METER, DISSOLVED <br />OXYGEN METER, ORP METER, AND <br />SPECIFIC CONDUCTANCE METER <br />BLACK RANGE <br />M I N E R A L S <br />Prepared for <br />Black Range Minerals <br />110 N. Rubey Drive, Suite 201 <br />Golden, CO 80403 <br />Prepared by <br />Whetstone Associates, Inc. <br />104 W Ruby Avenue <br />Gunnison, Colorado 81230 <br />970 - 641 -7471 <br />Document 4153A.140129 <br />January 29, 2014 <br />