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<br />y <br />are proposed to be included) in NPDES permits such as silver and <br />manganese appears to be possible based on this data. An increase <br />in the standard for other parameters, such as cadmium, which may <br />be considered for inclusion in future discharge permits, also <br />appears to be very feasible. <br />r <br />3.2 Recommendations <br />Based on the evaluation of the existing data base, the following <br />recommendations are made to achieve the remaining objectives of <br />this program: <br />1) Initiate a quality assurance program with respect to sampling <br />and laboratory analyses. This program would involve taking split <br />] samples from the NPDES discharge point 005. One set of samples <br />i will be sent to Bookcliffs Laboratories which has analysed all <br />previous samples. The split sample will be sent to another <br />laboratory to allow inter-laboratory comparison and verification. <br />Analysis results should be examined as soon as available so that <br />if any significant differences in analytical results are noted <br />re-analyses by the laboratories will be possible. An additional <br />split sample should be preserved and retained by either CYCC or <br />= TCC so that any questionable analysis may still be re-analysed if <br />j the sample has been discarded by the laboratory. <br />i 2) Initiate sampling for total and total recoverable <br />concentrations of zinc, silver, copper, and iron from all <br />sampling sites in addition to the existing monitoring program. <br />These parameters are planned to be included on the new NPDES <br />permit for site 005. A current set of data needs to be collected <br />to examine whether the change to total recoverable metal <br />) concentration limitations will provide significant relief from <br />~ potential exceedences. In addition a correlation between total <br />concentrations and total recoverable concentrations needs to be <br />generated. <br />3) Obtain a technical revision from CMLRD to allow dischar es <br />rom the oun mine and the We ge sump o be re-route 'nto <br />t Area 2 p1t. This wou pravi e surge con r~o~for the mine <br />~discha c e e ici D. <br />Considerable cost savings will be rea ize rom reduced <br />i maintenance requirements for the pond since approximately 99~ of <br />the suspended material presently entering the pond will be <br />deposited in the Area 2 pit after re-routing. <br />4) Obtain a suite of <br />Area 2 pit at a point <br />be analysed for TSS, <br />silver, and tonal rec <br />used to verify the <br />significantly reduce <br />would also be used to <br />samples at l0 foot depth intervals from the <br />close to the pit overflow. Samples should <br />total zinc, total recoverable zinc, total <br />~verable silver. These analyses may then be <br />hypothesis that a baffling system may <br />total metals contributions to Pond D and <br />optimize z_ design of such a system. <br />