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r 1 U MINE ID # OR PROSPECTING ID # INSPECTION DATE 5-11-94 (Page 2) • M-80-052 INSPECTOR'S INITIALS ACS The Division conducted an inspection of this site on December 28, 1993 in response to a complaint referral from the Colorado Department of Health (CDH Log # 931201). The inspection report prepared as a result of that inspection specified that the operator arrange to conduct certain investigative excavations at the Bite once the snow was off the Bite and the ground had thawed. The excavations were to determine the presence and extent of backfilling at the site with lime, and/or contamination of soil from petroleum spills. The report further specified that a representative of the Division be present to observe the excavations, and this inspection report documents observations made by the Division during the follow-up inspection. The backfilled water ponds that were associated with the asphalt batch plant that was operated at the pit during the summer of 1993 were excavated with a back-hoe. The back-fill consisted of a mixture of soil and lime, as well as some small pockets of pure lime. There was also some small amounts plastic and other debris. Two samples of the back-filled material were collected from the pits. When water was added to the samples, the pH of the resulting mixture in both cases was between 12 and 13 indicating the definite presence of lime, however, it was apparent from this inspection that the intent of back-filling of the small pond excavations was not disposal of lime, but that the lime ended up in the fill incidentally. As it was noted in the 12/28/93 inspection report, incorporation of incidental amounts of lime into back-fill material does not pose an environmental problem. The operator was instructed to remove and dispose of that lime that remained scattered on the ground surface in the area of the former batch plant. Also noted during this inspection, was a small area (20'x15') of oil saturated soil. Excavation revealed that the oil soaked ground extended to a depth of 2 to 6 inches. The operator loaded the contaminated soil onto a dump truck while the Division was still at the site, and was instructed to remove the soil to an approved disposal facility. Since the time of the inspection, the operator has notified the Division that the Jackson County landfill will not accept the soil, and the Division gave verbal approval to dump the soil in a single pile at the originally contaminated location until a suitable disposal area can be located. The operator must provide representative photographs of the cleaned up area once the contaminated soil has been removed, and must notify the Division as to how the soil was disposed. It was noted that the entrance sign has been posted and the permit boundaries have been adequately marked. This was in accordance with the requirements of the 12/26/93 report. The operator should maintain at least a 50 foot set-back from the cut-slope associated with the irrigation ditch once the pit extends that far to the east. It was noted that some of the asphalt piled at the south-east corner of the disturbed area was placed on top of topsoil. The operator should salvage and stockpile all topsoil before any areas are used for storage or any other mining related activities. I & E Contact Address NAME Keith Holsinoer OPERATOR Holsinger Gravel Pit STREET P.O. Box 37 CITY/STATE/ZIP Walden, CO 80480 cc: Carl Mount, DMG ~ CE BL FS ~ HW ® HMWMD (CH) Scott Klarich SE Colorado Dept. of Health ~ WQCD (CH) Hazardous Waste Control ~ OTHER 4300 Cherry Cr. Dr. S. Denver, CO 80222-1530