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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?