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• EXHIBIT I ADDENDUM: ADJUNCT SOILS INFORMATION <br />1.0: Existing Information <br />Following an initial review of the permit document, additional soils data was considered to be necessary to <br />adequately describe the edaphic conditions of an area proposed for gravel mining (addendum area) to the <br />west of the site originally proposed for facility disturbances. This addendum area consists of a neady level <br />river alluvial deposft overlain by Map Unil #50 (IGm loam, wol, 3 to 8 percent slopes), as described by the <br />Natural Resources Conservation Service (1995). The characteristics of this map unit were described in <br />Exhibit I submitted previously. <br />2.0: Site-specific Data Collection <br />The site-specific soil sampling efforts completed for the addendum area were completed by personnel <br />from Azurite, Inc. on November 11, 1997. The field sample methodology used followed that <br />recommended to Azurite by a representative of Cedar Creek Associates, Inc. <br />• To complete sampling, the proposed addendum area was viewed to become familiar with access routes <br />and surficial soil conditions characteristic of the site as influenced by topography, vegetation, and <br />geology. The addendum area was divided into two "blocks" within which sampling was completed. In <br />each block, one transact was walked in a nominally north-south direction. Fve sub-samples were taken <br />along each transact representing the surficial soil material from 6 to 18 inches in depth depending upon <br />soil profile conditions. In addition, notes were taken concerning surfical soil condRions (percent rock, <br />vegetation, litter, and bare ground), slope angle, soil color, texture, and percent coarse fragments. The <br />subsamples were then composited for shipment to the laboratory. <br />Two samples representing the surtace soil material of the two blocks were sent to the Soil and Plant <br />Testing Laboratory on the Colorado State University campus for analysis. The analyses to be completed <br />consisted of pH, texture (field method), percent organic matter, NHq-N and NO3-N (ppm),phosphorus <br />(ppm),potassium (ppm), electrical conductivity (mmhos/cm),lime estimate, and micro-nutrients (ppm). <br />The following discussion is based on this site-specHic analysis. Laboratory data sheets depicting results <br />of sample analysis are included at the end of this exhibit. <br />C~ <br />