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JUL 24.96 16:59 FR W 4 H PACIFIC 206 822 5341 TO I?062598829 P.02/09 <br />Calculations must be submitted for the compost filter treatment sysu-m and the <br />upstream control sttuctwes showing that the developed peak rate of flow from the 6 <br />month. 24-tour storm will be routed to and treated by the compost filter treatment <br />system. <br />A contingency plan must be submitted to the City for review and approval, dygg <br />whatt_omatittttttYilure of the syam_and indicating the steps to be taken in the event <br />of system Allure. in 4errny e� Ow" :^J oFtLv jr, IJ.rs /fedoceof -Flow <br />-t'hf lIn 4'tnt A14-crs. 4.0 C40"P05ihcn c:F rVUd"W. <br />�A monia wl% plan must also be submitted to the City for review and approval. The <br />tM'goal of the monitoring plan is to document that stotmwater runoff from the 6 month, ►1 k�° <br />R" �� ( 24-hour storm jt flowing through the compost media before discharge to Merrill and <br />•CLnD� Ring Creek. It would appear that flow measurement from each bay of filters is <br />t.lor rl ' possible. Is it proposed? How often? What flow rates we expected from each bay? <br />In addition, the beight of compost melia within the cartridges should be measured i r <br />periodically (if settlement of the media is a possible problem). re <br />as d or <br />i also have the following question, which may or may not be answered by the ln0 du <br />operation and *+ntVWrAmC manual: & <br />uJ t <br />Do the radial cartridges come "pre -filled" with compost, or are they filled on site? If k A%Vf iV5 <br />they <br />filled on site, the plans or maintenance manual should specify the procedure to 1 �,; Lk�r <br />e used. <br />,f f° k� �5 <br />, <br />Wben maintaining the system. are entire cartridges replaced, or is just the compost 1�"1l <br />within the cartridge replaced? C0'6 k a n <br />if settlement of the compost madla in the radial filters is a possible concern. will the a} <br />cartridges be "topped off" periodically to prevent stormwater flow from passing <br />through the cartridge without being treated by the compost media? <br />] Given. the configuration of the system, is it possible to determine If an individual <br />F <br />G .cartridge has Ailed, or just a section of cartridges. What signals the need for <br />rof,n0'tieplacrmetm of the cartridges? <br />' t r '3 -� How will sediment that accumulates in the treatment cells be removed? <br />r 7 <br />0 <br />�1 �Ar Skd �' ia� rts! F�27 <br />N1�81 �5 y JG yE h'Vd'G' 11 'f i cJ e <br />dal watol l,R.rel ;� r 11"cc�� <br />lF�kl P��,rrq J iplM,Or ,uc� <br />rt� kK dory r'� �aekr <br />5�5 W'�� <br />C1 <br />07/24/96 16:52 TX/RX N0.0327 <br />P.002 <br />