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b) The October 20, 1987 analysis relates the acid base <br /> potential of the Terry Tunnel sediment ranging from -14 . 8 to <br /> -13 . 7; Table 28 (attached) suggests anything less than -5 <br /> tons CaCO3 equivalent/1000 tons is unsuitable for use as a <br /> growth medium (potential root zone) . <br /> c) The copper content of the Terry Tunnel sediment ranges from <br /> 136 to 172 parts per million (ppm) ; Table D-2 of the <br /> consolidated permit relates the Lake Emma sediment copper <br /> content as 53 . 7 ppm; Table 1 shows normal uncontaminated <br /> soil copper ranges between 2-100 ppm; Table 3 suggests <br /> phytotoxicity levels ranging between 40 and 100 ppm. <br /> d) The lead content of the Terry Tunnel sediment ranges from <br /> 380-420 ppm; Lake Emma sediments (Table D-2, page D: 4) were <br /> 204 ppm; Table 1 shows normal uncontaminated soil lead <br /> ranges from 2-200 ppm; Table 2B suggests soils with lead <br /> concentrations greater than 2 ppm are unsuitable for use as <br /> a growth medium; Table 3 suggests phytotoxic ranges from <br /> 2-200 ppm. <br /> e) Table 3 suggests manganese concentrations exceeding 60 ppm <br /> may be phytotoxic; Terry Tunnel sediments range from 160-199 <br /> ppm. <br /> f) Terry Tunnel sediment zinc concentrations range from <br /> 370-490 ppm; Lake Emma sediment zinc concentration <br /> (Table D-2) is related as 105 ppm; Table 1 suggests normal <br /> uncontaminated soils zinc concentrations range from <br /> 10-300 ppm; Table 3 suggests phytotoxic levels of zinc <br /> concentrations to be 40 ppm or greater . <br /> g) Terry Tunnel sediments cadmium concentrations range from 6 . 2 <br /> to 9. 34 ppm compared to Lake Emma ' s 0. 37 ppm cadmium <br /> concentration. <br /> 2. Please provide a schedule of transporting the Terry Tunnel <br /> sediments to Tailing Pond Number 3 , as required in your <br /> consolidated permit. Additionally, future disposal of Terry <br /> Tunnel sediments must occur atop Tailing Pond Number 3 . <br /> RESPONSE <br /> Response to the subject of Terry Tunnel muds will be made under <br /> separate cover , as this subject is not related to the amendment No. 3 <br /> for open pit mining in the Sunnyside Basin. <br /> Monitoring - Sunnyside Basin <br /> 1 . Please specify baseline monitoring sampling frequency as well as <br /> post-baseline monitoring schedules; it is understood that an <br /> -16- <br />