Designation:F1525–96(Reapproved2001)StandardGuideforUseofMembraneTechnologyinMitigatingHazardousChemicalSpills1ThisstandardisissuedunderthefixeddesignationF1525;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoversconsiderationsfortheuseofmem-branetechnologyinthemitigationofdiluteconcentrationsofspilledchemicalsintogroundandsurfacewaters.1.2Thisguideaddressestheapplicationofmembranetechnologyaloneorinconjunctionwithothertechnologies.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Inaddition,itistheresponsibilityoftheusertoensurethatsuchactivitytakesplaceunderthecontrolanddirectionofaqualifiedpersonwithfullknowledgeofanypotentialorappropriatesafetyandhealthprotocols.2.ReferencedDocuments2.1ASTMStandards:F1127GuideforContainmentbyEmergencyResponsePersonnelofHazardousMaterialSpills23.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1concentrate,retentate—inreverseosmosisandnano-filtration,respectively,theportionofthefeedsolutionthatdoesnotpassthroughthemembraneiscalledconcentrate,whilethetermretentateismorecommonlyusedforultrafiltrationandmicrofiltration.3.1.2crossflowfiltration—afiltrationprocessinwhichthefeedflowsalmostparalleltothefilterormembranesurface.Itisalsocalledtangentialflow.3.1.3flux—ameasureoftherateatwhichthepermeate(orfiltrate)passesthroughthemembraneperunitareaofmem-brane.ItisreportedinunitsofL/m2/day,m3/m2/day,orgal/ft2/day.3.1.4fouling—theaccumulationofunwanteddepositsorscalesonamembranethatresultsinafluxreduction.3....
