{"id":63540,"date":"2006-10-10T17:50:15","date_gmt":"2006-10-10T17:50:15","guid":{"rendered":"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/article\/sensing-a-solution_o"},"modified":"2006-10-10T17:50:15","modified_gmt":"2006-10-10T17:50:15","slug":"sensing-a-solution_o","status":"publish","type":"post","link":"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/projects\/infrastructure\/sensing-a-solution_o\/","title":{"rendered":"Sensing a solution"},"content":{"rendered":"<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"> <\/div><div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"> <p class=\"wp-block-paragraph\">Isolation is the name of the game in Naperville, Ill. The city\u2014a rapidly growing community of 140,000\u2014is in the process of isolating problem sections of its wastewater collection system to make it more efficient and prioritize maintenance.<\/p> <p class=\"wp-block-paragraph\">The wastewater collection system is a separate sanitary sewer system\u2014most of it gravity-fed\u2014with 469 miles of sewer lines and 19 pump stations. The treatment plant also receives flows from nearby Warrenville, Ill.; average daily flow entering the plant is 22.5 mgd.<\/p> <p class=\"wp-block-paragraph\">In recent years, the system has experienced tremendous expansion and hydraulic loadings. Clay lines installed as early as the 1920s are deteriorating. Reducing inflow and infiltration (I\/I) to avoid overload\u2014thus avoiding higher treatment costs, excessive pumping costs, and increased pump wear\u2014is critical.<\/p> <p class=\"wp-block-paragraph\">The Water Distribution and Collection Division of the city&#8217;s Department of Public Utilities has developed a flow monitoring program that provides \u201csnapshots\u201d of current conditions, letting them identify, isolate, and rehabilitate sections that aggravate the I\/I problem. The agency monitors flows at 24 permanent and 10 temporary sites. Two of the permanent sites measure flows from Warrenville for billing; the rest are used primarily for I\/I monitoring and determining I\/I versus rehab costs.<\/p> <p class=\"wp-block-paragraph\">Field supervisor Tony Conn says permanent meters help determine what lines have the most serious I\/I problems. \u201cWe break these areas down into smaller sections using our temporary flow meters, and we keep these in place during the entire rehab process,\u201d he says. \u201cWe compare the flows in these sections before and after rehab and can also easily determine the amount of I\/I we knocked off at what cost.\u201d<\/p> <p class=\"wp-block-paragraph\">Naperville is replacing the older sensors with Sigma AV flow and level sensors from Loveland, Colo.-based Hach Co. The sensors\u2014developed to withstand harsh environments\u2014avoid problems that the older sensors displayed. About every two weeks, technicians had to clean fouled sensors or level-adjust ones that were drifting.<\/p> <p class=\"wp-block-paragraph\">In six permanent monitoring sites, the city has installed new sensors with oil-filled cover plates, designed for sites susceptible to extreme fouling. The high-viscosity silicone oil prevents fouling for up to a year and can be easily replenished onsite. Scattergraph plots of depth and velocity readings from the sensors reveal hydraulic conditions and can expose bottlenecks and obstructions. Based on its success, the city plans to replace all its permanently mounted flow and level sensors with the AV units over the next several years, funding the effort through user fees. Most importantly, the new measurement devices are improving upon the I\/I mitigation program&#8217;s positive results.<\/p> <p class=\"wp-block-paragraph\">\u201cIn the areas that we have been working, the payback in rehabilitation costs is about eight years,\u201d says Conn. \u201cAlso, a $6 million treatment plant expansion will not be necessary because flows have been reduced.\u201d<\/p> <p class=\"wp-block-paragraph\"><i>\u2014 Jim Caruso is product application specialist of flow and sampling for Hach Co., Loveland, Colo.<\/i><\/p><\/div> ","protected":false},"excerpt":{"rendered":"<p>Isolation is the name of the game in Naperville, Ill. The city\u2014a rapidly growing community of 140,000\u2014is in the process of isolating problem sections of its wastewater collection system to make it more efficient and prioritize maintenance. The wastewater collection system is a separate sanitary sewer system\u2014most of it gravity-fed\u2014with 469 miles of sewer lines [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":63543,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"scheduledNewsletterDates":[],"_scheduled_newsletter_id":0,"footnotes":"","jetpack_post_was_ever_published":false,"zonda_content_type_url_append":"_o","zonda_dfp_zone":"","zonda_exclude_recommended_contents":false,"zonda_exclude_most_popular":false,"zonda_exclude_tagged_results":false,"zonda_eyebrow":"Products Solving Problems","zonda_last_newsletter_date":"2099-12-31T23:59:59.999-05:00","zonda_original_url":"","zonda_pdf_version":0,"zonda_print_headline":"Sensing a solution","zonda_promo_abstract":"The Water Distribution and Collection Division of the city's Department of Public Utilities has developed a flow monitoring program that provides snapshots of current conditions, letting them identify, isolate, and rehabilitate sections that aggravate the I\/I problem.","zonda_promo_headline":"","zonda_promo_image":0,"zonda_subheadline":""},"tags":[],"news_item_type":[28],"section_10":[83124],"subject":[1027],"organization":[],"award":[],"person":[],"product_type_10":[],"content-group":[],"event":[],"location":[],"state":[],"brand":[21460],"jlc-category":[],"year_tax":[],"sponsor":[],"coauthors":[88654],"class_list":["post-63540","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","news_item_type-article","section_10-infrastructure","subject-distributors","brand-public-works"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Sensing a solution<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zonda-develop.go-vip.net\/concrete-construction\/projects\/infrastructure\/sensing-a-solution_o\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sensing a solution\" \/>\n<meta property=\"og:description\" content=\"Isolation is the name of the game in Naperville, Ill. The city\u2014a rapidly growing community of 140,000\u2014is in the process of isolating problem sections of its wastewater collection system to make it more efficient and prioritize maintenance. 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