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5TATE OF COLORADO <br /> Bill Ritter,Jr.,Governor <br /> James B.Martin,Executive Director OV co d <br /> Dedicated to protecting and improving the health and environment of the people of Colorado ye ` y 190 <br /> 4300 Cherry Creek Dr.S Laboratory Services Division *� * <br /> Denver,Colorado 80246-1530 8100 Lowry Blvd. " <br /> Phone(303)692-2000 Denver,Colorado 80230-6928 �87 <br /> TDD Line(303)691-7700 (303)692-3090 <br /> Located in Glendale,Colorado Colorado Public <br /> Health <br /> of Pubc Hlth <br /> http:l/www cdphe.state.co.us and Erivironment <br /> May 4, 2009 <br /> Ms. Patti Zietlow <br /> Colorado Springs Utilities <br /> MSC 0940 <br /> Colorado Springs Utilities <br /> P.O. Box 1103 <br /> Colorado Springs, CO 80947-0940 <br /> Re: Final Agency Actions: 1) Approval with Modification for Request to Place Inert <br /> Construction and Demolition Debris in the Clear Spring Ranch Gravel Pit #2 — Phase 2 <br /> Mining Area, El Paso County, Colorado; and 2) Approval for Request for a Waiver fi•om <br /> the Liner and Groundwater Monitoring Requirements for the Placement of Inert Fill in <br /> the Clear Spring Ranch Gravel Pit#2 —Phase 2 Mining Area, El Paso County, Colorado <br /> Dear Ms. Zietlow: <br /> The Hazardous Materials and Waste Management Division of the Colorado Department of <br /> Public Health and Environment ("the Division") has reviewed the subject requests. The Request <br /> to Place Inert Construction and Demolition Debris in Gravel Pit #2 —Phase 2 Mining Area("Fill <br /> Request') was received in our office on January 28, 2009. Prior to evaluating the Fill Request, <br /> Colorado Springs Utilities (CSU) was asked to provide a formal waiver request to the Division <br /> seeking relief frorn constructing a liner'beneath Gravel 'Pit i-12 as weli as waiving the groundwater <br /> monitoring requirements. The Request for a Waiver from the Liner and Groundwater <br /> Requirements for the Placement of Inert Fill in the Clear Spring Ranch Gravel Pit #2 -- Phase 2 <br /> Mining Area(Waiver Request) was received in our office on April 1, 2009. <br /> Gravel Pit # 2 is an active mine operating under Permit M-1992-074, issued by the Colorado <br /> Division of Minerals and Geology (now known as the Division of Reclamation Mining and <br /> Safety). After the mining has been completed, Gravel Pit 92 will be backfilled with inert <br /> material, according to the Certificate of Designation (CD) issued by El Paso County, CD-04-001. <br /> According to the Fill Request, the material to be placed within Gravel Pit #2 will be restricted to <br /> inert non-putrescible materials such as soil, gravel, concrete, asphalt, and other inert solids <br /> generated frorn CSU and other City of Colorado Springs projects. Although the facility's <br /> Engineering Design and Operations Plan (EDOP) states that till materials will not be accepted <br /> from non City-owned generators, and the till material will be periodically spot-checked for non- <br /> I <br />