Laserfiche WebLink
Mr. Gabriel Karam <br />August 2, 2002 <br />Page - - <br />4. For the biological treatment process, design calculations should include the <br />following: <br />Process performance objectives. <br />Sludge yield. <br />c. Design mean cell residence time (MCRT). <br />.d. Process kinetic design calculations. <br />Oxygen demands. <br />Aeration system performance and required air flows. <br />Alkalinity balance and required chemical additions, if any. <br />Waste sludge volumes and solids content. <br />Clarifier overflow rate and solids flux. <br />5. For the disposal system design, a geotechnioal report is required, including soii ; <br />characteristics, groundwater elevations, and analyses of soil permeability and the <br />capacity of the soil profile to accept water without surfacing. The analysis must <br />address the percolation and subsurface flow away from the disposal area of - <br />effluent and rainwater during the winter when evapotranspiration is not possible. • <br />- 6. A geotechnical report indicating soil conditions and depth to groundwater for the <br />treatment plant site. <br />Hydraulic calculations for all pumping systems and gravity flow portions of the , . plant. <br />8 Consideration should be given to the need for influent screening or grinding.- . _ • <br />9. Plans for taking ,units out of service for repair or maintenance and consideration <br />of the need for eme.rgency storage. <br />10. Sludge handling methods, including any required dewatering, transportation, and <br />. disposal. <br />.A descriptiOnof any automated 'control functions. For example, haw are all the _ „ , • <br />pumps controlled to Match flows through the plant? - <br />12. Provisions for power failure. <br />The -plans are indornplete in many aspects (no architectural or structural drawings, no <br />site plan, inadequate mechanical plans and sections, etc.), however, based on what is <br />shown, We have the following concerns: - <br />- <br />There should be an influent flow meter.