04-9 (ml 6.12) a pristine stream flowing at 100 cubic feet per second (cfs) in the rocky mountains contains 5 mg/l of suspended solids (ss). during the spring, ice melt conveys an additional 250 mg/l of tss at a rate of 20 cfs into the stream. determine the concentration of tss in the stream during the spring. (hint: treat the ice melt as a secondary stream added to the first.) 46 mg/l