8/17/2010 SEWER COMMISSION Minutes

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cap NOME because this approach may place the I In the absence of historical data,a PM I Many STEP systems have exces- customer in a more responsible post- I program initially should be executed an- sive 0&M costs that are attributable tion of identifying system alarms and malty,with a gradual increase in the time II to excessive investments in service reporting them to the management ! between PM intervals once the integrity equipment or labor costs.While STEP entity,Most studies reveal that cus- of the system is established. I systems can be maintained with basic tourers want as little responsibility as tools,a small pickup truck,and suf- possib�e related to their systems. Maintenance Activities II ficient replacement-part inventory,it In practicality,the most cost-efficient I One of most important compo- 1 is common to see heavy-duty utility STEP management approaches balance j nents of STEP O&M cost is tank pump-i vehicles in use.Additionally,while most PM and RM to achieve the lowest overall I out intervals.Extended tank pump tasks can be performed by asingle ser- cost for O&M.The STEP systems that intervals can be achieved through vice technician during normal business typically achieve the best overall O&M the use of larger tanks and through �I hours,many high-cost system man- cost tend to extend PM cycles to the I the inspection and measurement of agemeut entities employ two or more maximum time increment possible until I solids and scum accumulation.While I service personnel,often working during RM maintenance starts to become cost- lower capital costs can be achieved by 1 overtime hours.It is more typical for a prohibitive.PM intervals can be affected 1 using smaller tanks,the cost of larger I single technician with a pickup truck to significantly by material quality,filter flow- tanks easily can be paid back through maintain about 2000 STEP connections through area,and tank quality and sizing. extended pump-out intervals.Some i with high-quality STEP systems. Selecting a PM protocol and cycle time studies have found that managed Public education is important. should be derived based on historical STEP tank pump-out programs can New customers should be given guid- information garnered from established' achieve pump-out Intervals up to and ance that explains their wastewater systems with similar characteristics. sometimes in excess of 10 years. collection system,along with the dos 51 - inflico , ® ,s The DensaDegm clarifier/thickener is a high-rate solids contact clarifier which produces very dense sludge that rapidly settles and thickens in one tank.Degremont Technologies-Infilco offers trusted,proven solutions for all your sludge treatment needs.Contact us today! e Enhanced primary treatment of wastewater •Tertiary treatment—Phosphorus removal x s Lime softening t c , Combined clarification and softening Clarification of surface waters t • 4•� E p @ WR&T %VWN'.WEF.0RWMA4{AZINF k I