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<br />PnR~1GON <br />CONSULTING GROUP <br />i ~ i <br />February 27, 2002 <br />Ms. Connie Davis <br />Aggregate Industries -WCR, Inc. <br />P. O. Box 3121 <br />Greeley, Colorado 80633 <br />RE: January 2002 Quarterly Monitoring Report <br />Aggregate Industries F Street Facility <br />4509 F Street <br />Greeley, Colorado <br />Project Number 1001018 <br />Dear Ms. Davis: <br />1103 Oa4 Ak Drive, Suirc I IO <br />fort Cdliro, CO BO525 <br />Poore (970) 377-1600 <br />I'iz (970)77AIBBJ <br />w.w.wr.KOrr~.m <br />DnVID M. Rnu, P.E, DEE <br />Scan A. Rummwxo, P.E <br />BKICK $Mrix, RE <br />JnMts M. TxoMns, P.E <br />RRAD C. Woxun <br />S7tvtz+A M,uuq P.E <br />AMr D. Wsern, ELT. <br />HFw'mvx S. NnmMnx <br />The purpose of this report is to summarize the results of the quarterly groundwater sampling <br />event performed at the site in January 2002. As requested, copies of this report were <br />submitted to the Colorado Division of Minerals and Geology (DMG), Colorado Department <br />of Public Health and Environment (CDPHE) and Weld County Department of <br />Environmental Health. The approximate location of the site is shown on Figures 1 and 2 <br />which are attached to this report. <br />I. BACKGROUND <br />The subject facility is leased by Aggregate Industries -WCR, Inc. (Aggregate Industries) and <br />is used for the mining of aggregates and production of asphalt pavement. A 10,000-gallon <br />diesel-fuel above-ground storage tank (AST) was utilized at the site for the fueling of on-site <br />machinery and vehicles. During the reconciliation of the April 2001 inventory records for <br />the AST, it was discovered that a release had occurred from the diesel-fuel system. The <br />release was investigated by Aggregate Industries personnel beginning on May 1, 2001 and <br />was confirmed on May 7, 2001. The release was reported to the CDPHE on May 8, 2001. <br />Based on information provided by Aggregate Industries, the volume of the diesel-fuel spill <br />was estimated to be approximately 10,840 gallons and reportedly occurred over a relatively <br />short period of time from mid-March to the end of April 2001. <br />°SERVICE~ QUALITY, AND INNOVATION° <br />ENVIRONMENTAL ENGINEERING AND GEOHYDROLOGY <br />