First Things First. Awkward. Backflow Prevention & Residential Landscape. 17 Failure Rates of Assemblies on Lawn Irrigation Systems Joe Smolinski

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1 17 Failure Rates f Assemblies n Lawn Je Smlinski & Residential Landscape Ptential fr Failure & Assciated Risk First Things First First Things First Je Smlinski Currently: Deputy City Manager in Mansfield, Texas Class A Water License WO Previusly: Directr f Utilities Labratry Directr / Quality Assurance Officer Licensed Irrigatr - LI Assembly Tester BP Irrigatin Inspectr - II 5 Jeff Price Directr f Utilities in Mansfield, Texas Class A Water License WO Plumbing Inspectr I 2936 Assembly Tester BP 4933 Custmer Service Inspectr CI 2313 Wastewater Cllectins Operatr III WW First Things First Awkward David Multn Utility Cmpliance Manager in Mansfield, Texas Class A Water License WO Assembly Tester BP Custmer Service Inspectr CI 9873 Licensed Irrigatr - LI Irrigatin Inspectr - II 4 Cde Enfrcement Officer What d these fur peple have in cmmn? Deputy City Manager that used t be the Directr f Utilities Directr f Utilities Utility Cmpliance Manager Any six year ld that yu ve ever met 2017 ABPA Cnference San Antni, TX 4 April

2 17 Failure Rates f Assemblies n Lawn Je Smlinski They All Lve t Talk Abut Pp What Culd Pssibly G Wrng? Sewer Treatment Plants Sanitary Sewer Systems Sewer Lift Statins and Frced Mains Fecal Clifrm Bacteria Dg Pp The Water That Yur Device Is Submerged In Rsce P. Cltrane Did Yu Knw Fecal Clifrm Thrives at What Temperature? 37º Celsius What is 37º Celsius Equivalent T? 98.6º Fahrenheit Human Bdy Temperature What Happens t the Water in a Bx in the Texas Heat? Fecal Clifrm Incubates Shift Gears But Befre We D Remember These Three Things The Rle Landscape Irrigatin Plays in Lcal Water Supply And The Need T Prtect It 2017 ABPA Cnference San Antni, TX 4 April

3 17 Failure Rates f Assemblies n Lawn Je Smlinski Yu Have Mre Influence Than Yu Realize Public Health Using Mansfield as an example: 18,690 residential water cnnectins Over 13,695 f them are cnnected t an irrigatin system 73% All f them, hpefully, have a backflw preventin device Yu have the pwer t educate them abut the risks assciated with backflw Quality f Life Irrigatin helps them prtect their investments and bst prperty value Fundatin Landscaping Testers have the ability t help them use their resurces wisely Water cnservatin Can help them save them mney Inclining blck rate structure Infrastructure csts Super Sized Infrastructure A Little Abut Water Demand A Little Abut Water Demand Yu Are Here We Can Help One Anther Water Purveyrs Public Health Water Quality Water Supply Backflw Testers Business pprtunity fr thse already cmmitted t prtecting public health Landscape Irrigatrs Yu have t ask yurselves, as industry prfessinals, what is the greatest risk t yur lngterm survival in this industry? Shwers Flwers Getting Back t Backflw A Real Life Example f Hw Cst Can Override Reasn Opprtunity Lst Drught Restrictins Water Rates Cst t Cnsumers 2017 ABPA Cnference San Antni, TX 4 April

4 17 Failure Rates f Assemblies n Lawn Je Smlinski Backlash Over Backflw: Just Trying T D The Right Thing I Warned Yu "T ften (the current prgram) seems arbitrary, with a resident n ne side f the street getting a letter and anther ne nt. Or ne resident being charged ne amunt and anther being charged much mre," he said. "I am ppsed t the way the rdinance is being enfrced nw, (but) at the same time I understand this is ultimately abut maintenance. S I d believe we need t revisit this." Lngview News-Jurnal Lngview repeals yearly tests fr residential systems Epidemilgy 101 Acute Gastrintestinal Illness is Significantly Under Reprted Hw many f yu have ever had the runs? Hw many f yu went t the dctr fr treatment? Hw many f yu had a dctr that cllected a stl sample? Hw many samples were tested fr waterbrne bacteria? Hw many had the lcal health department ntified? Five Questins There are a lt f ptential surces: Industrial Pllutants Cmmercial Cntaminants Sme are much less bvius: Landscape Irrigatin Fertigatin Rsce P. Cltrane Mansfield, Texas City-Wide Backflw Preventin Devices Cmmercial Devices 1,937 in (2009) 2,452 in (2016) Backflw Study: Prbability & Risk 2017 ABPA Cnference San Antni, TX 4 April

5 17 Failure Rates f Assemblies n Lawn Je Smlinski City-Wide Backflw Preventin Devices Cmmercial Devices 1,937 in (2009) 2,452 in (2016) Residential Devices 12,000 in (2009) 13,695 in (2016) City-Wide Backflw Preventin Devices Cmmercial Devices 1,937 in (2009) 2,421 in (2015) Residential Devices 12,000 in (2009) 13,370 in (2015) Data Frm Other Cities 10-15% failed the 1 st year they were tested 2-5% failed in subsequent years Cllege Statin 24% failed the 1 st year Every 7 years 2009 Backflw Study Is There an Actual Risk? Are the Devices in the Field Gd? 2009 Study Sample Size 372 ut f 12,000 Cnfidence Level = 95% Cnfidence Interval = +/-5% Ppulatin Permitted Residential Recrds frm 1987 Unpermitted Representative Age Prperty Value 2009 Study Bacterilgical Data Tested 34 fr Clifrm / E.Cli 34 (100%) had Clifrm Bacteria 21 (72%) had Clifrm & E.Cli Backflw Device Tests Tested (19.9%) Failed Failure Rate Wrse With Age What did the 2009 study tell us? Water in the bx is nt safe 100% clifrm 72% fecal clifrm Failure rate is wrse with age N surprise 19.9% verall 11 65% depending n age Installatin almst never cnfrms t manufacturers specificatins Belw grade, submerged What the 2009 study did nt tell us Are results repeatable? Water quality in main line Test cck #4 Main Line Abve vs. Belw Des belw grade installatin increase failure rate? 2017 ABPA Cnference San Antni, TX 4 April

6 17 Failure Rates f Assemblies n Lawn Je Smlinski 2015 Study Update Cntaminatin was Cnsistent Searched fr standing water in bx 11 samples cllected 100% clifrm 64% fecal clifrm (7) Water Quality in Main Line 36 samples cllected frm test cck #4 33% clifrm (12) 5.5% fecal clifrm (2) Abve vs. Belw Tested fails frm that were replaced passed 5 that were nt replaced failed again Tested 64 abve grade installs 100% passed Water Quality n Supply Side Test cck # mg/l avg. residual 100% abve 0.5 mg/l Water Quality n Discharge Side 2017 Study Update 35 samples cllected frm test cck #4 77% clifrm (27) 0% fecal clifrm (0) 0.3 mg/l avg. Cl2 60% n residual % Failure Rate Overall Failure Rate Increases with Age Imprper Installatin 100% Clifrm Bacteria 72% Fecal Clifrm Bacteria N One Cares Cnfirmed Failure Rate Bacteria in Bx Main Line Cntaminatin 33% Clifrm 5.5% Fecal Clifrm Abve Grade Installatin Better Results in This Study Previus Results Repeatable Failure Rates Bacterilgical Cntaminatin Disinfectant Residual Present n Supply Side 2.86 mg/l Insufficient Disinfectant Residual n Discharge Side 0.3 mg/l 60% = 0 mg/l What we need frm ther cities Similar studies Scientific in their apprach Access t water quality labratries Tests fr fertilizers, herbicides, and pesticides are extremely expensive Defend water quality, nt budgets Public health vs. cst Public perceptin Outreach What we need frm the state Clear directive What des the state say? Tw VERY different questins: Shuld we be ding it? D we have t d it? Spnsr a study Guidance dcument Questins? 2017 ABPA Cnference San Antni, TX 4 April