PERMFILE114490

• Permit No: C1981010
• IBM Index Class Name: Permit File
• Doc Date: 5/17/2004
• Doc Name: p. C-94 to C-179
• To: DMG
• Section_Exhibit Name: Appendix W 2003 Report Section 2.5 Appendix C Part 2
• Media Type: D
• Archive: No

LTA COMMERCIAL TESTING 8 ENGINEERINGCO.
srce „m.
NARRATIVE
• CLIENT
Trapper Mining, Inc. Craig Mine, P.O. Box 187, Craig, CO 81626-0187
• DATE OF REPORT
March 31, 2003
• PERMIT AND SAMPLE INFORMATION
NPDES permit #I:
Type of sample:
Date and time of sample(s):
Date and time of test start:
Dilution water:
Receiving temperature(s):
•
CO-0032]]5
Effluent Grab
03/24/03 N/A
03/25/03 1200
Reconstituted Laboratory Water
2.5 ° C
• TEST ORGANISMS
Ceriodaphnia dubia
Fathead Minnow
Age: <24 hrs
Age: l2 days
• PROCEDURE
Acute, 48 and 96 hour bioassays as outlined in the most recent protocols specified by the
Water Quality Control Division of the Colorado Department ofNealth (1998).
• DISCUSSION
Trapper Mining's Craig Mine outfall 020 effluent was not acutely toxic to either species
tested. Therefore, Trapper Mining, Inc. is can ently in compliance with the acute WET
portion of its Colorado State Discharge Permit for the first quaver of 2003.