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RealWorldImplicationsofCalifornia’sNSF/ANSI61Certified
ConcreteRequirements
SteveCaswell,P.E.,Carollo EngineersKevinPeacock,DNTanks
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RevisedWaterworksStandards• CCRTitle22
• UpdatedandrevisedrequirementsforWaterworksprojects
• Specificrequirementsfornewwells,storagetanks,reservoirs,sourcecapacity,permitting,watermainsandadditives
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RevisedWaterworksStandards
• Section64591‐ indirectadditives‐chemicalsleachingfrommaterialsincontactwithdrinkingwateri.e.pipes,storagetanks,coatingsandanymaterialsincontact.
CCRTitle22
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Section64591‐ IndirectAdditives
..watersystemshallnotuseanychemical,material,lubricant,orproductintheproduction,treatmentordistributionofdrinkingwaterthatwillresultinitscontactwiththedrinkingwaterincluding
– processmedia(carbon,sand)– protectivematerials(coatings,linings,liners)– joiningandsealingmaterials(solventcements,weldingmaterials,gaskets,lubricatingoils),
– mechanicaldevicesusedintreatment/transmission/distributionsystems(valves,chlorinators,separationmembranes
– pipesandrelatedproducts(pipes,tanks,fittings)
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Section64591‐ IndirectAdditives
• …testedandcertifiedasmeetingthespecificationsofNSFInternational/AmericanNationalStandardInstitute(NSF/ANSI)61‐2005/Addendum1.0‐2005(DrinkingWaterSystemComponents—HealthEffects),whichisherebyincorporatedbyreference
• ThisrequirementshallbemetundertestingconductedbyaproductcertificationorganizationaccreditedforthispurposebytheAmericanNationalStandardsInstitute.(ANSI)
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ANSIandNSF
• NSFInternationalisastandardsdevelopmentorganizationandalsooperatesANSIaccreditedcertificationprograms.
• ThereareotherANSIaccreditedcertificationprograms.
• ANSI approvesstandardsandaccreditscertificationorganizations.(www.ansi.org)
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ANSI– approvesSTDSandaccreditsprograms:http://www.ansi.org/
1. CanadianStandardsAssociationhttp://www.csagroup.org/us/en/industries/plumbing/drinking‐water‐requirements
2. IAPMOhttp://www.iapmortl.org/Pages/ANSINSF.aspx
3. NSFInternational(alsodevelopsstds)http://www.nsf.org/business/water_distribution/standard61_overview.asp
4. UnderwritersLaboratoryhttp://www.ul.com/global/eng/pages/offerings/industries/waterandfood/water/prodcert/components/
5. WaterQualityAssociationhttp://www.wqa.org “WQAGoldSeal”http://www.wqa.org/sitelogic.cfm?ID=1632
AccreditedCertificationPrograms
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CurrentProjectOptionsforConcrete
Option3– FacilityCertificationMethod
Option2 – ConcreteSiteMixEvaluationMethod
Option1 – ApprovedComponentsCertificationMethod
Option4– AlternativeMethod
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Option1– ApprovedComponentsCertificationMethod
Whenallcomponents(cement,admixtures,aggregates,etc.)oftheconcretemixturearecertifiedbyanapprovedNSF/ANSI61laboratory,noadditionaltestingisrequiredtocertifytheconcretemixture.Listsofapprovedcomponentscanbefoundatthefollowingwebsites:
– http://info.nsf.org/Certified/PwsComponents/– https://www.wqa.org/Find‐Products– http://database.ul.com/cgi‐bin/XYV/template/LISEXT/1FRAME/index.html
– http://pld.iapmo.org/default.aspx– http://www.csagroup.org/us/en/services/testing‐and‐certification/certified‐product‐listing
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Option1– ApprovedComponentsCertificationMethod
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Option1– ApprovedComponentsCertificationMethod
ConstituentApproval– ANSI/NSF61approvedadmixtures– ANSI/NSF61approvedcement
• Cemex• CalPortland• Lehigh•Mitsubishi
– AggregateTesting• ANSICertifiedLaboratory
– Totaldurationfortestingfromshippingofaggregates4‐8weeks
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Option2‐ ConcreteSiteMixEvaluationMethodAprojectspecificmethodwhereaconcretemixtureistestedforNSF/ANSI61complianceeventhoughoneormoreoftheindividualcomponentsarenotcertified.Asampleofthehardenedconcrete,typicallyaconcretecylindercastbyanapprovedlaboratory ,isanalyzedtodetermineifthemixturemeetstherequiredspecifications.
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Option2‐ ConcreteSiteMixEvaluationMethodCylinderTesting
– Developmixdesign– CastcylinderandsendtoANSIapprovedlaboratory– Soaktestingisperformed– Totaldurationfortestingfromstartofcasting8‐12weeks
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Option3– FacilityCertificationMethodAbatchingfacilitycanbecertifiedtoproduceNSF/ANSI61approvedmixtures.Thismethodistypicallymoreexpensivethantheothermethodsbutallowsthefacilitytosupplytheapprovedmixturetoanyprojectsolongasthefacilitymaintainstheircertification(1‐5yearsdependingonthecertificationcompany).Theprocessforcertificationisasfollows:1. Companysubmitsanapplication.2. Provideproductformulation,toxicologyand
productuseinformation.3. Toxicologydepartmentreviewsformulations.4. Plantauditandsamplecollection.5. Laboratoryconductstesting.6. Finaltoxicologyevaluation.7. Certificationissuedforcompliantproducts
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Option4‐ AlternativeMethod
ThelawallowsuserstoproposeanalternativemethodofcompliancetotheWaterBoardwithdemonstrationthattheproposedalternativewillprovidethesamelevelofprotectiontopublichealthandobtainwrittenapprovalfromthedepartment.
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CityofSacramento,CA–ProjectCaseStudy
SteveCaswell
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CityofSacramentoWaterTreatmentPlantRehabilitationProject
• $114M constructioncost• Currentlyunderconstruction• Two160MGDtreatmentplants• Replacing90yearoldconventionaltreatmenttrain• Addingsolidshandlingfacilitiestobothtreatmentplants
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ProjectTimeline
Planning2007‐2009
Design2010‐2012
ConstructionNTP May2013
ConstructionCompletionAugust2016
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Design‐ RegulatoryDiscussions
• Summer2012– DPH positiononlycementandadmixturesmeetNSF61,notaggregate
• Latefall2012– DPH indicatesthataggregateand/orcylindertestingMAYberequired
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Design‐ SupplierDiscussions
Supplier ConstituentTesting CylinderTesting
Cement Admixture Aggregate
Supplier1 Yes Yes No Possibility
Supplier2 ? Yes No ?
Supplier3 ? Yes No ?
Supplier4 No Yes No Yes
Supplier5 No Yes No No
Supplier6 Yes Yes No Possibility
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Design‐ SupplierDiscussions
Supplier Constituent Testing CylinderTesting
Cement Admixture Aggregate
Supplier1 Yes Yes No Possibility
Supplier2 ? Yes No ?
Supplier3 ? Yes No ?
Supplier4 No Yes No Yes
Supplier5 No Yes No No
Supplier6 Yes Yes No Possibility
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Design‐ SpecificationDevelopment
• Factorstoaddress– Unknownregulatoryposition– Unknownabilityofsupplierstomeetstandard– Couldtestingbecompletedpriortobid?– Scheduleimplications
• Approach– Constituent‐OR‐ Cylindertestingallowed– Contractorresponsibleforallcosts– Mustbeapprovedpriortoanyconcretepours
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Construction‐ ConcreteComplianceMethods
• ConcreteConference– Supplierindicatedusingconstituentmethod– StartedtestingpriortoNTP– Approvaltook10weeks– ApprovalnotanNSFlisting
• Massconcreteimplications– Useofflyash– Requiredtestingusingcylindermethod– Approvaltook3months
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Construction‐ OtherConsiderations
• DefininglocationsthatrequireNSF61concrete• Pre‐caststructures
– Nopre‐castsuppliershaveNSF61approvals– Canusejobmixorgetapproval
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CaseStudiesCentralValley
• 1.10MGStorageTank• InsideDiameter:86’‐0”• WallHeight:26’‐0”• ConcreteCompliancethroughConstituentComplianceAlliedConcretewasSupplier– NSFapprovedadmixtures– NSFapprovedcement(CalPortland)– AggregatetestingthroughIAMPO
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CaseStudiesCentralValley,CA
• 3.0MGStorageTank• InsideDiameter:126’‐0”• WallHeight:37’‐0”• ConcreteCompliancethroughConstituentComplianceCalaveraswasConcreteSupplier– NSFapprovedadmixtures– NSFapprovedcement(Lehigh)– AggregatetestingthroughUL
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ProjectDevelopment• Understandearlyinprojectdesign/developmentifconcretewillbeincontactwithpotablewater.
• Engageinconversationswithlocalconcretesuppliersand/ormanufacturersonavailability
• Determineiftestingwillbedonepriortobidorafterbid
• Testingrequirementscanbesetforthinspecificationsforoncontractor
• Testingmaybedonebyownerorconsultantpriortobid
• CheckwithyourlocalWaterBoardofficeregardingcompliance
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GoingForward• NSFStd 61Table3.1– MaterialSpecificAnalyses
– Dec2012Proposedtestsforcementbeyondregulatedmetals• GC/MS,• dioxinsandfurans,• radionuclides,• glycolsandethanolamines
• Longtermgoal:Istestingnecessaryconsideringatrackrecordofresults.
• Foracertainvolume/surfaceareacantestingbewaived.
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Summary
Testingcanbecompletedforanyprojectthrough:ConstituentTestingCylinderTesting
Questions?