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TR9PPER MINING INC. <br />,.~....~ <br />III IIIIIIIIIIIIIIII <br />May 29, 1990 <br />CERTIFIED #P568141748 <br />~~~=~~~ <br />Section Chief <br />Colorado Dept. of Health ,JAN 1 'i:)'?L <br />Waste Management Division MIN~~ i.4P)G <br />Underground Tank Program _ <br />4210 East 11th Ave. =~~_AMATIOPi ~IV1~"- ~1 <br />Denver, CO 80220 <br />Dear Sir: <br />Subject: Site Assessment for Underground Storage Tank Closure <br />Recently Trapper Mining Inc, removed three underground waste oil tanks <br />(one 4,000-gallon, one 2,000-gallon, and one 350-gallon) at its facility <br />located 6-1/2 miles south of Craig, Colorado (see attached map). All <br />tank removal procedures were in accordance with applicable and current <br />state and federal regulations. <br />- A site assessment and waste sludge composition determination were per- <br />formed for each underground tank as it was removed from the ground. <br />Prior to tank removal and following the establishment of our surface <br />waste oil storage system, a sample of the waste oil sludge from each <br />tank was taken and analyzed as to the hazardous nature of the waste <br />material. Analysis performed included the following parameters: <br />TOX (Total organic halogens) <br />BTEX (Benzene, Toluene, Ethylbenzene, Xylene) <br />flashpoint <br />EP toxicity for metals <br />Attached are waste sludge analysis reports provided by ACZ Laboratories <br />in Steamboat Springs, Colorado. Based on these analyses (non-hazardous <br />or toxic) the material (approximately 1,000 gallons) was transported and <br />disposed of by Conservation Services, Inc., Denver, Colorado. Attached <br />is an Industrial Waste Disposal Manifest provided to Trapper Mine by <br />Conservation Services Inc, (No. 030022; CSI waste code no. CO-02-042090- <br />03639). The empty waste oil tanks will either be sold to a local scrap <br />metal dealer or disposed of in out active mine pit. <br />Underground tanks were excavated with a backhoe and removal procedures <br />monitored by Trapper Environmental Quality, Engineering, and Safety per- <br />sonnel. A Colorado Registered Professional Engineer (Roger Fish, <br />#26063) was on hand to evaluate and docwnenC our findings (see attached <br />correspondence). <br />P.0. Box 187 Craig, Colorado 81626 (303) 824-4401 <br />