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1 <br />t 2.0 SITE DESCRIPTION <br />' 2.1 Topography <br />Average elevation at the Montgomery Pit is approximately 6499 feet above mean sea level (amsl). <br />' The facility is located on the northern side of a topographic high and with a gentle slope towazd the <br />Eagle river. The northem boundary of the site is approximately 50 feet south of the Eagle River. <br />Surface soils mainly consist of silts, sands, some clay and gravel with boulders ranging from %Z inch <br />' to 6 inches in diameter. <br />2.2 Surface Drainage <br />Surface drainage at the Montgomery Pit facility runs to the north. The site is bound by the Hockett <br />Ditch to the south, and to the north by the Eagle River which flows from east to west. <br />' 2.3 Surrounding Land Use <br />Adjacent land to the south is mainly rocky and mountainous terrain. To the north is the Eagle river <br />flood plain. <br />' 3.0 PREVIOUS INVESTIGATIONS <br />' Dames & Moore conducted a preliminary site investigation of the Montgomery Pit facility on <br />November l2 and 12, 1998. Tltis site assessment included an initial site reconnaissance, mapping, <br />' a photographic record and collection of environmental soil samples. <br />Three soil samples, a dust sample and three wipe samples were collected during [his preliminary <br />' investigation. All samples were analyzed for chlorinated and phenoxy weed killers, volatile organic <br />compounds (VOCs), Total Recoverable Petroleum Hydrocazbons (TRPH), Diesel Range Petroleum <br />Hydrocazbons (DRO) and Oil & Grease. Lab analysis results showed no detections of VOCs in any <br />' of the samples. The chemical 2,4D was detected only in one soil sample at concentrations below <br />regulatory limits. It was also detected in a bag house dust sample, and in all three wipe samples <br />collected from the original dnun containers. Dicamba was detected in all samples at concentrations <br />' below Practical Quantitation Limits (PQLs). TRPH and oil & grease was detected in two soil <br />samples at low concentrations. <br />' Based on the previous results, a complete site investigation was performed by Greg Lewicki & <br />Associates and TechLink Environmental at the site on Mazch 26, 1999. This site investigation was <br />performed following the Sampling and Analysis Plan approved the Colorado Division of Minerals <br />and Geology on February 23, 1999. <br />Environmental Site Investigation Montgomery Pil <br />TechLink Enviromnental, Inc. 3 B&B Excavating <br />LJ <br />