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aqueduct to underground workings or other fractured bedrock. <br /> It is highly recommended that these areas be capped to <br /> minimize infiltration. Crushed waste-rock (very fine <br /> particle size) or the slime fraction of the mill tailing may <br /> supplement the lake sediments for use as "impermeable" <br /> media. <br /> RESPONSE <br /> Pit bottoms will not be excavated beyond where they can daylight to <br /> surface drainages . Lake sediments will be placed over the pit floors <br /> to the extent that material is available to help reduce percolation <br /> rates . <br /> Water Quality - Sunnyside Basin <br /> 1 . Please revise the previous question found in Exhibit D - Mining <br /> Plan, Number 1 under Waste Rock Deposition. <br /> RESPONSE <br /> See response to Exhibit D Mining Plan, Number 1 under Waste Rock <br /> Deposition. <br /> Water Quality - Terry Tunnel <br /> 1. Pursuant to the consolidated permit, pond sediments from the <br /> Terry (and American) Tunnel require disposal atop Tailing Pond <br /> Number 3 . As noted in the Division ' s October 28 , 1987 Inspection <br /> Report, the Terry Tunnel pond sediments were placed in an <br /> excavated trench east of the ponds; the Division requested <br /> sediment analyses . <br /> Upon review of the Terry Tunnel sediment analysis dated <br /> October 20 , 1987 , Tables D-2, D-3 ad D-4 on pages D: 4 and 5 of <br /> the consolidated permit, and literature concerning soil <br /> constituents related to phytotoxicity and suitability for use as <br /> a growth medium (Tables 1 , 2 and 3 ) , it appears that the Terry <br /> Tunnel sludge is not necessarily transported Lake Emma sediments, <br /> is not suitable as a plant growth medium, and requires adequate <br /> disposal atop Tailing Pond Number 3 . <br /> Sunnyside Gold Corporation ' s response to the Division ' s <br /> inspection report, including an AB-DTPA extract analysis of the <br /> sediments, received by the Division on January 4 , 1988 , assessed <br /> that the Terry Tunnel pond sediments were actually transported <br /> Lake Emma sediments because of similarities in the textural and <br /> chemical analyses of the sludge : <br /> -14- <br />