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<br />" <br /> <br />would be made monthly during the September-through-April period and <br /> <br /> <br />bimonthly during the May-through-August period. At each in-reservoir <br /> <br /> <br />sampling location, between 3 and 6 water-quality samples would be <br /> <br /> <br />collected to give a vertical profile of conditions. Also, secchi-disk <br /> <br /> <br />depths would be measured at each survey location. Field measurements of <br /> <br /> <br />water temperature, dis.solved-oxygen concentration, pH, and specific <br /> <br /> <br />conductance would be made in association with each collected sample. <br /> <br /> <br />For purposes of this proposal, it has been assumed that 3 samples each <br /> <br /> <br />would be collected at the tributary-arm reservoir profiles and that 6 <br /> <br /> <br />samples would be needed at the near-dam deeper reservoir profile for a <br /> <br /> <br />total of 12 samples per survey. The general guideline of collecting <br /> <br /> <br />samples between one-half meter below the reservoir's water surface and <br /> <br /> <br />one-half meter off the bottom would be adhered to; aslo, sample <br /> <br /> <br />intervals of 1-1/2 meters for vertical profiles would be maintained, <br /> <br /> <br />In general, it is anticipated that reservoir field surveys would be made <br /> <br /> <br />between 0800 and 1600 hours of each sampling day. In the case that <br /> <br /> <br />inclement-weather and/or ice-cover conditions would result in surveys <br /> <br /> <br />not being conducted in accordance with the above-described frequency, <br /> <br /> <br />more intensive survey coverage may be considered during the summer <br /> <br /> <br />(May-through-August) period. The chemical and biological variables to be <br /> <br /> <br />measured for the in-reservoir sampling are summarized in Table 2. <br /> <br /> <br />Only upper mixing-zone samples would be collected for chlorophyll <br /> <br /> <br />a and algal biomass analyses; cell-density counts would be included in <br /> <br /> <br />the analyses of algal biomass for a total of 48 samples for these <br /> <br /> <br />biologically- related variables, <br /> <br />40 <br />