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Environmental Protection Plan, Schwartzwalder Mine 14-1 <br />0 14. GEOCHEMICAL DATA AND ANALYSIS <br />(a) Geochemical Characterization of Waste Rock and Fill <br />Waste rock from the mine includes lime-silicate-hornblende gneiss, garnet-biotite gneiss, mica schist, and <br />smaller amounts of quartzite, pegmatite, and vein material. The East and West Waste Rock Piles have a <br />combined area of about 6.3 acres (Figure 2-1). The footprint of the East Waste Rock Pile is about 4.0 <br />acres. The footprint of the West Waste Rock Pile is about 2.3 acres. <br />Waste rock has also been placed as fill in the valley adjacent to Ralston Creek. The fill material covers an <br />area of approximately seven (7) acres. The composition of the fill is similar to the waste rock piles. <br />During reclamation, additional fill was mined from the Black Forest Mine, east of the Schwartzwalder <br />Mine, and used as cover and fill material in the valley. The material from the Black Forest Mine is a <br />hornblende gneiss similar to the hornblende gneiss that was produced from the Schwartzwalder Mine. <br />Geochemical characterization data for waste rock are available from several sources including whole rock <br />analyses of elemental composition, acid-base accounting tests, acid consumption tests, and a bottle roll <br />leaching test. Sources of waste rock geochemical characterization data are summarized in Table 14-1. <br />Table 141. Summary of Geochemical Characterization Data for Waste Rock and Fill <br />Test Type Sample Source <br />Whole Rock Analysis Underground workings <br />Acid-Base Accounting Waste rock piles <br />Bottle Roll Underground workings <br />Acid Consumption Waste rock piles <br />• (i) Whole Rock Analysis <br />Whole rock analyses of the elemental chemistry of rock materials at the Schwartzwalder Mine are available <br />from studies by Wallace (1983) and Wallace and Karlson (1985). Average mineral and chemical analyses <br />for the evaluated rock types are summarized in Table 14-2. <br /> <br />4109C.090807 Whetstone Associates