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Technical Revision No. 06 Permit No. M-77-344 Noloam, Inc. Quarry Portland, Colorado 1. Introduction The purpose ofthis Technical Revision is to allowthe landfilling of cement kiln dust (GIGO) in previously mined areas of the Holnam, Inc. quarry. Included in this Technical Revision is a description of Holnam's CI{D disposal procedures and facilities, a closure plan for the disposal areas, a description of erosion control measures used at the site, a discussion of CKD sampling and analysis, and a description of hydrogeologic conditions at the site. The Holnam Portland quarry is located in the SE 1/4 of Section 17, T19S, R68W, Fremont County, Colorado (Figure 1) which is adjacent to the Arkansas River approximately 22 miles northwest of Pueblo and five (5) miles east of Florence, Colorado. The "affected area" of the quarry consists of approximately 485 acres located on the north side of the Arkansas River. Approximately 107,000 tpy of CKD is currently disposed of in onsite landfills in mined portions of the quarry (Figure 2). In addition to the CICD, sludge from the nearby Fremont Sanitation District wastewater treatment plant is added to the landfill as daily cover. The site is currently operating under a mining permit (No. M-77-344) obtained from the State of Colorado. The mine reclamation plan - statesthat CICDwill beused for mine reclamation. Under Colorado Solid Waste Regulation IA 1.3.7, CKD is exempt from regulation for facilities that currently have mining permits, therefore, the site does not have a solid waste_permit for landfilling CICI). 2. Description of Holnam's CICD Disposal Plan and Disposal Facilities. Disposal of CKD into the quarry area at Holnam's Portland plant began in 1986. The amount of CKD landfilled in the quarry area since that time is as follows: 1986-89 approximately 95,000 tons per year KS-990102 Pege 1 K-S &Company August 16, 1999 CopyrigAt1999