EPA 9100 SATURATED HYDRAULIC CONDUCTIVITY,

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1、METHOD9100SATURATEDHYDRAULICCONDUCTIVITY,SATURATEDLEACHATECONDUCTIVITY,ANDINTRINSICPERMEABILITY1.0INTRODUCTION1.1ScopeandApplication:Thissectionpresentsmethodsavailabletohydrogeologistsandandgeotechnicalengineersfordeterminingthesaturatedhydraulicconductivityofearthmaterialsandconductivityofsoil

2、linerstoleachate,asoutlinedbythePart264permittingrulesforhazardous-wastedisposalfacilities.Inaddition,ageneraltechniquetodetermineintrinsicpermeabilityisprovided.AcrossreferencebetweentheapplicablepartoftheRCRAGuidanceDocumentsandassociatedPart264StandardsandthesetestmethodsisprovidedbyTableA.1.

3、1.1Part264SubpartFestablishesstandardsforgroundwaterqualitymonitoringandenvironmentalperformance.Todemonstratecompliancewiththesestandards,apermitapplicantmusthaveknowledgeofcertainaspectsofthehydrogeologyatthedisposalfacility,suchashydraulicconductivity,inordertodeterminethecompliancepointandmo

4、nitoringwelllocationsandinordertodevelopremedialactionplanswhennecessary.1.1.2Inthisreport,thelaboratoryandfieldmethodsthatareconsideredthemostappropriatetomeetingtherequirementsofPart264aregiveninsufficientdetailtoprovideanexperiencedhydrogeologistorgeotechnicalengineerwiththemethodologyrequire

5、dtoconductthetests.Additionallaboratoryandfieldmethodsthatmaybeapplicableundercertainconditionsareincludedbyprovidingreferencestostandardtextsandscientificjournals.1.1.3Includedinthisreportaredescriptionsoffieldmethodsconsideredappropriateforestimatingsaturatedhydraulicconductivitybysinglewellor

6、boreholetests.ThedeterminationofhydraulicconductivitybypumpingorinjectiontestsisnotincludedbecausethelatterareconsideredappropriateforwellfielddesignpurposesbutmaynotbeappropriateforeconomicallyevaluatinghydraulicconductivityforthepurposessetforthinPart264SubpartF.1.1.4EPAisnotincludingmethodsfo

7、rdeterminingunsaturatedhydraulicconductivityatthistimebecausethePart264permittingstandardsdonotrequiresuchdeterminations.1.2Definitions:Thissectionprovidesdefinitionsoftermsusedintheremainderofthisreport.Thesedefinitionsaret