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PERMITTEE NAME/ADDRESS(Include Facility NamelLocahonlfDifferent) NAME: Oxbow Mining LLC ADDRESS: PO Box 535 Somerset, CO 81434-0535 FACILITY: 9ANBORN CRK & ELK GRK MINES LOCATION: 3737 HIGHWAY 133 SOMERSET, CO 81434 ATTN: Mike Ludlow Exec VP NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) DISCHARGE MONITORING REPORT (DMR) C00000132 007-A PERMIT NUMBER DISCHARGE NUMBER MONITORING PERIOD MMIDDIYYYY MM/DD/YYYY 06/01/2015 06/30/2015 Form Approved OMB No 2040-0004 DMR Mailing ZIP CODE: 81424-0535 MINOR GUNIS SEDIMENT POND TO HUBBARD CREEK External Outfall No Discharge NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system des gned to assure that qualified personnel properly gather aM valuate the information submitted Based an my ingwry of the person or persons who manage the system, or those peMons directly responsible for gathering the information, the information submitted is to the best of my knowletlge and belief true accurate and complete I am aware that there are significant penalties for submitting fake information including the possibility of fine and imprisonment for ownng violations QUANTITY OR LOADING QUALITY OR CONCENTRATION NO. FREQUENCY SAMPLE PARAMETER SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT EX OF ANALYSIS TYPE VALUE VALUE UNITS VALUE VALUE VALUE UNITS pH SAMPLE .,..._ ...... ...... ....._ MEASUREMENT 0040010 PERMIT *~"*"* ~`~"~ ••... 6.5 """" 9 SU Monthly INSITU Effluent Gross REQUIREMENT MINIMUM MAXIMUM Solids, total suspended SAMPLE *•*'** ***"* *`**~* *••*** MEASUREMENT 0053010 PERMIT '***** *`*`•* ***'** '***" 35 70 mg/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Solids, settleable SAMPLE •'*'~' *`*~~' **•'~ *****` MEASUREMENT 005451 0 PERMIT **`*** ****" `~***' ****•` Req. Mon. Req. Mon. mL/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Iron, total [as Fe] SAMPLE *`**" ~*'*" `*"*' ~***•' MEASUREMENT 0104510 PERMIT ****•' "***" "**** •***"' 3500 7000 ug/L Monthly GRAB Effluent Gross REQUIREMENT 30DA AVG DAILY MX Oil and grease SAMPLE MEASUREMENT 0358210 PERMIT *****` **'*"* *"`*' ***~'* •"•'* 10 mg/L Contingent GRAB Effluent Gross REQUIREMENT INST MAX Flow, in conduit or thru treatment pla it SAMPLE *`**" ****** •***** ****** MEASUREMENT 50050 1 0 PERMIT Req. Mon. Req. Mon. MGD "*•*" ***"** ****"' ****** Monthly INSTAN Effluent Gross REQUIREMENT 30DA AVG DAILY MX Solids, total dissolved SAMPLE `*•**' *•**** *"**` `*•"* MEASUREMENT 702951 0 PERMIT **"*** ••**** ***•** **""` Req. Mon. Req. Mon. mg/L Quarterly GRAB Effluent Gross I REQUIREMENT 30DA AVG DAILY MX NAMEITITLE PRINCIPAL EXECUTIVE OFFICER I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system des gned to assure that qualified personnel properly gather aM valuate the information submitted Based an my ingwry of the person or persons who manage the system, or those peMons directly responsible for gathering the information, the information submitted is to the best of my knowletlge and belief true accurate and complete I am aware that there are significant penalties for submitting fake information including the possibility of fine and imprisonment for ownng violations \ r ` l / 1 TELEPHONE DATE -� / , t� 7t �Z/ �� G�lW/LGA . SIGNATURE OF PRINCIPAL EXECUTIVE OFFICER OR AUTHORIZED AGENT TYPED OR PRINTED ARFA Code NUMBER MMIDDIYYYY COMMENTS AND EXPLANATION OF ANY VIOLATIONS (Reference all attachments here) TSS & TOTAL IRON LIMITS WILL BE WAIVED, AND SETTLEABLE SOLIDS LMT APPLIED FOR -1 PRECIP EVENT,SETTLEABLE SOLIDS LIMIT MAY BE WAIVED FOR >10YR,24HR EVENT -SEE I.A.1,PP 4-5, AND I.A.2, P. 5 FOR RQMNTS.TDS MONITORING -SEE PART VI.A.2.G OF RATIONALE. 30 DAY AVG. IS HIGHEST MONTHLY AVG. DURING PERIOD REPRTD. EPA Form 3320A (Rev.01106) Previous editions may be used. 10/17/2013 Page 1 at