ÿWPC>)  •’ yƒ³4-e`¹Ý;&Æ=Iâo±tj¼WaoÚ´Cjý¦¯óÓþd¤Ý–èÞuŽ G ,û*4…羂;Rj–2¿—’gOõq½èŸÊÍÊß;û;gËMú#Λ—ç¹c^»¦f#rh~ FrSGû^ !&ßbvšÀ~ÆÉ¬j«Û4ܤÐcÓ;ߥ7pž‘úà0clU6ž¸M¸1ñh*Ýê%Ñc=&ûKÝ­Ž0Ť*¹¦ÉÈ læáSfNœ´ aþýoʇ\4È_3Ôo¿„à§+½);ÔhBÏŠf< ®ž“ùýŒþº–ü/Ç3 •Œt2•„‹çIŽ„ÑEÙûã&ÃÊæ°§z—œ]ßp]ê‹t1íbôšS‘¦ k=AÄÐ5À ÍõÞ~§Z<—½ÌŽ£×KˆxC{¢¨Ýåú&²]Çü1¥‰$ú–ûвhLSˆa®½w‰¢¼†[;5ÁWt1ÞbH¶ù± xoÃ@†h3³’†oFe‡x ”ß@Kh ïÅüûgÖ›^B!$QZóïI­¬i¿›DD*Zˆa+Ý.i ˜¶{N—öÈä³á—Á ð݆•&ú(0ì¤Ô‡ó̉ƒ Uñâ¸íÓ= 0~V 0xÔ 0kL 0k· 0š" 0~¼ 0Ñ: 0ä 0¦ï 0÷• 0 Œ 0– 01´ 0Cå 0V( 0Ï~ 0¤M 0¤ñ 0Õ 0¼X 0» 0ÙÏ 0£¨ 0£KU:î %( 0z. 0ä¨ Œ 0= 0FÚ 0P  1“p 0Ù 1Ü 0·á¢˜ 0O:!E‰!#É‹! 0OT$N£$ 0O¥$ 1·ô$«%n­»% 04h& Bœ&U@¹&^ ù&w'4 '&'UJC((•( m—( 0P®(®(U@þ(V& ÿÿ8Document[8]Document Styleà0..àà8` ..` àÌVÿÿ8Document[4]Document Styleà..àò òòò.óó€€ó óV ÿÿ8Document[6]Document Styleà8..àÌV ÿÿ8Document[5]Document Styleà0..àÌV/ÿÿ8Document[2]Document StyleÌò òÔ2ÔA.Ô3  Ô€òòÔ  ÔÔ  ÔÌó óóóV& ÿÿ8Document[7]Document Styleà0..àà0` ..` àÌzU ÿÿ:Right Par[1]Right-Aligned Paragraph NumbersàÐ.. àÔ2ÔI.Ô3  Ô€ˆà°..°àà0..àÌzh ÿÿ:Right Par[2]Right-Aligned Paragraph Numbersà..ààÐ` ..øàÔ2ÔA.Ô3  Ô€ˆà..àà0` ..` àÌV?ÿÿ8Document[3]Document StyleÌà..àò òÔ2Ô1.Ô3  Ô€Ô  ÔÔ  Ôó óz{ ÿÿ:Right Par[3]Right-Aligned Paragraph Numbersà..àà` ..` ààи ..P àÔ2Ô1.Ô3  Ô€ˆà` ..` àà0¸ ..¸ àÌzŽ ÿÿ:Right Par[4]Right-Aligned Paragraph Numbersà..àà` ..` àภ..¸ ààÐ..¨ àÔ2Ôa.Ô3  Ô€ˆà¸ ..¸ àà0..àÌz¢ ÿÿ:Right Par[5]Right-Aligned Paragraph Numbersà..àà` ..` àภ..¸ àà..ààÐh..ˆàÔ2Ô(1)Ô3  Ô€ˆà..àà0h..hàÌzµ ÿÿ:Right Par[6]Right-Aligned Paragraph Numbersà..àà` ..` àภ..¸ àà..ààh..hààÐÀ..ààÔ2Ô(a)Ô3  Ô€ˆàh..hàà0À..ÀàÌzÇ ÿÿ:Right Par[7]Right-Aligned Paragraph Numbersà..àà` ..` àภ..¸ àà..ààh..hààÀ..ÀààÐ..°àÔ2Ôi)Ô3  Ô€ˆàÀ..Ààà0..àÌzÚ ÿÿ:Right Par[8]Right-Aligned Paragraph Numbersà..àà` ..` àภ..¸ àà..ààh..hààÀ..Ààà..ààÐp..àÔ2Ôa)Ô3  Ô€ˆà..àà0p..pàÌVXÿÿ8Document[1]Document StyleÌÔ  Ôà@ì..^àòòò òÔ  ÔÔ2ÔI.Ô3  Ô€Ô  ÔÔ  ÔÔ  ÔˆÌóóó ól2ÿÿ:Technical[5]Technical Document Styleà..àò òÔ2Ô(1)Ô3  Ô€.€€ó ól2ÿÿ:Technical[6]Technical Document Styleà..àò òÔ2Ô(a)Ô3  Ô€.€€ó ól/%ÿÿ:Technical[2]Technical Document StyleÌò òÔ2ÔA.Ô3  Ô€òòÔ  ÔÔ  ÔóóÌà..àó ól,!ÿÿ:Technical[3]Technical Document StyleÌò òÔ2Ô1.Ô3  Ô€Ô  ÔÔ  Ôà..àó ól(!ÿÿ:Technical[4]Technical Document Styleò òÔ2Ôa.Ô3  Ô€Ô  ÔÔ  Ôà..àó ól:0ÿÿ:Technical[1]Technical Document StyleÌòòò òÔ  ÔÔ2ÔI.Ô3  Ô€Ô  ÔÔ  ÔÔ  ÔÌóóà..àó ól1ÿÿ:Technical[7]Technical Document Styleà..àò òÔ2Ôi)Ô3  Ô€.€€ó ól1ÿÿ:Technical[8]Technical Document Styleà..àò òÔ2Ôa)Ô3  Ô€.€€ó ó<þ6X9`("Courier 10cpiXR& ÿÿ8BibliogrphyBibliographyà0..àà°..°àÌÌfpÿÿ2Doc InitInitialize Document StyleÓ€ÓÈÓS€ !    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Ðthis€title€(relating€to€Post„Closure€Care€Maintenance€Requirements).Ð l&|" ÐÌò òó óÔ#†<&õ%%1&õ½#ÔAdopted€August€6,€2003à€ÂÂ0(#àEffective€September€1,€2003ˆÐ ((8$ ÐÌò òðð330.231.€€Groundwater€Monitoring€Systems.ó óÐ ä)ô & ÐÌò òó óÔ‡1&õ%%<&õÔà  à(a)€€A€groundwater€monitoring€system€must€be€installed€that€consists€of€a€sufficient€number€ofÐ  +°"( Ðmonitoring€wells,€installed€at€appropriate€locations€and€depths,€to€yield€representative€groundwaterÐ ~,Ž#) Ðsamples€from€the€uppermost€aquifer€as€defined€in€ðð330.2€of€this€title€(relating€to€Definitions).Ð \-l$* Їà  àà ` à(1)€€Background€wells€shall€be€installed€to€allow€determination€of€the€quality€ofÐ ð Ðbackground€groundwater€that€has€not€been€affected€by€leakage€from€a€unit.€€A€determination€ofÐ Î Þ Ðbackground€quality€may€include€sampling€of€wells€that€are€not€hydraulically€upgradient€of€the€wasteÐ ¬ ¼ Ðmanagement€area€if€hydrogeologic€conditions€do€not€allow€the€owner€or€operator€to€determine€whichÐ Š š Ðwells€are€hydraulically€upgradient€or€if€sampling€at€other€wells€will€provide€a€better€indication€ofÐ h x Ðbackground€groundwater€quality€than€is€possible€from€upgradient€wells.Ð F V ÐÌà  àà ` à(2)€€The€downgradient€monitoring€system€must€include€monitoring€wells€installed€toÐ  Ðallow€determination€of€the€quality€of€groundwater€passing€the€relevant€point€of€compliance€as€definedÐ àð Ðin€ðð330.2€of€this€title.€€The€downgradient€monitoring€system€must€be€installed€to€ensure€the€detectionÐ ¾Î  Ðof€groundwater€contamination€in€the€uppermost€aquifer.€€When€physical€obstacles€preclude€installationÐ œ¬  Ðof€the€groundwater€monitoring€wells€at€existing€units,€the€wells€may€be€installed€at€the€closestÐ zŠ  Ðpracticable€distance€hydraulically€downgradient€from€the€relevant€point€of€compliance€as€defined€inÐ Xh  Ððð330.2€of€this€title€that€will€ensure€detection€of€groundwater€contamination€of€the€uppermost€aquifer.Ð 6F  ÐÌà  à(b)€€The€executive€director€may€approve€a€multi„unit€groundwater€monitoring€system€instead€ofÐ ò  Ðseparate€groundwater€monitoring€systems€for€each€municipal€solid€waste€landfill€(MSWLF)€unit€whenÐ Ðà  Ðthe€facility€has€several€units,€provided€the€multi„unit€system€meets€the€requirement€of€subsection€(a)€ofÐ ®¾ Ðthis€section€and€will€be€as€protective€of€human€health€and€the€environment€as€individual€monitoringÐ Œœ Ðsystems€for€each€MSWLF€unit,€based€on€the€following€factors:Ð jz ÐÌà  àà ` à(1)€€number,€spacing,€and€orientation€of€the€MSWLF€units;Ð &6 ÐÌà  àà ` à(2)€€hydrogeologic€setting;Ð âò ÐÌà  àà ` à(3)€€site€history;Ð ž® ÐÌà  àà ` à(4)€€engineering€design€of€the€MSWLF€units;€andÐ Z j ÐÌà  àà ` à(5)€€type€of€waste€accepted€at€the€MSWLF€units.Ð "& ÐÌà  à(c)€€The€executive€director€may€approve€an€alternative€design€for€a€groundwater€monitoringÐ Ò#â Ðsystem€that€uses€other€means€in€conjunction€with€monitoring€wells€to€ensure€detection€of€groundwaterÐ °$À  Ðcontamination€in€the€uppermost€aquifer€from€an€MSWLF€unit.€€The€alternative€design€shall€be€at€leastÐ Ž%ž! Ðas€protective€of€human€health€and€the€environment€as€a€monitoring„well€system€as€specified€inÐ l&|" Ððð330.231(a)€of€this€title€(relating€to€Groundwater€Monitoring€Systems).Ð J'Z# ÐÌà  à(d)€€Monitoring€wells€shall€be€constructed€in€accordance€with€the€rules€of€the€commission€andÐ ) % Ððð330.242€of€this€title€(relating€to€Monitor„Well€Construction€Specifications).€€Monitoring„wellÐ ä)ô & Ðconstruction€shall€provide€for€maintenance€of€the€integrity€of€the€bore€hole,€collection€of€representativeÐ Â*Ò!' Ðgroundwater€samples€from€the€water„bearing€zone(s)€of€concern,€and€prevention€of€migration€ofÐ  +°"( Ðgroundwater€and€surface€water€within€the€bore€hole.Ð ~,Ž#) ÐÐ \-l$* Ðà  àà ` à(1)€€Within€30€days€of€the€completion€of€a€monitoring€well€or€any€other€part€of€aÐ ð Ðmonitoring€system,€details€of€its€construction€shall€be€submitted€to€the€executive€director€and€shallÐ Î Þ Ðinclude,€as€appropriate,€a€detailed€geologic€log€of€the€boring,€a€description€of€development€procedures,Ð ¬ ¼ Ða€detailed€location€map€drawn€to€scale€showing€the€relationship€of€the€well€to€the€MSWLF€unit€andÐ Š š Ðrelevant€point(s)€of€compliance,€and€any€other€data€obtained€during€installation€or€construction€of€theÐ h x Ðwell€or€system.Ð F V ÐÌà  àà ` à(2)€€All€parts€of€a€groundwater€monitoring€system€shall€be€operated€and€maintained€soÐ  Ðthat€they€perform€at€least€to€design€specifications€through€the€life€of€the€groundwater€monitoringÐ àð Ðprogram.Ð ¾Î  ÐÌà  à(e)€€A€groundwater€monitoring€system,€including€the€number,€spacing,€and€depths€ofÐ zŠ  Ðmonitoring€wells€or€other€sampling€points,€shall€be€designed€and€certified€by€a€qualified€groundwaterÐ Xh  Ðscientist.€€Within€14€days€of€the€certification,€the€owner€or€operator€shall€submit€the€certification€to€theÐ 6F  Ðexecutive€director€and€place€a€copy€of€the€certification€in€the€operating€record.€€The€plan€for€theÐ $  Ðmonitoring€system€and€all€supporting€data€must€be€submitted€to€the€executive€director€for€review€andÐ ò  Ðapproval€prior€to€construction.Ð Ðà  ÐÌà  àà ` à(1)€€The€design€of€a€monitoring€system€shall€be€based€on€site„specific€technicalÐ Œœ Ðinformation€that€must€include€a€thorough€characterization€of:€€aquifer€thickness;€ground„water€flowÐ jz Ðrate;€groundwater€flow€direction€including€seasonal€and€temporal€fluctuations€in€flow;€effect€of€siteÐ HX Ðconstruction€and€operations€on€groundwater€flow€direction€and€rates;€and€thickness,€stratigraphy,Ð &6 Ðlithology,€and€hydraulic€characteristics€of€saturated€and€unsaturated€geologic€units€and€fill€materialsÐ  Ðoverlying€the€uppermost€aquifer,€materials€of€the€uppermost€aquifer,€and€materials€of€the€lowerÐ âò Ðconfining€unit€of€the€uppermost€aquifer.€€A€geologic€unit€is€any€distinct€or€definable€native€rock€or€soilÐ ÀÐ Ðstratum.Ð ž® ÐÌà  àà ` à(2)€€Groundwater€modeling€may€be€used€to€supplement€the€determination€of€the€spacingÐ Z j Ðof€monitoring€wells€or€other€sampling€points€and€shall€consider€site„specific€characteristics€ofÐ 8!H Ðgroundwater€flow€as€well€as€dispersion€and€diffusion€of€possible€contaminants€in€the€materials€of€theÐ "& Ðuppermost€aquifer.€€Any€model€used€shall:Ð ô" ÐÌà  àà ` àà ¸ à(A)€€have€supporting€documentation€that€establishes€its€ability€to€representÐ °$À  Ðgroundwater€flow€and€contaminant€transport,€as€needed;Ð Ž%ž! ÐÌà  àà ` àà ¸ à(B)€€have€a€sound€set€of€equations€based€on€accepted€theory€representingÐ J'Z# Ðgroundwater€movement€and€contaminant€transport;Ð ((8$ ÐÌà  àà ` àà ¸ à(C)€€have€numerical€solution€methods€that€are€based€on€sound€mathematicalÐ ä)ô & Ðprinciples€and€supported€by€verification€and€checking€techniques;Ð Â*Ò!' ÐÌà  àà ` àà ¸ à(D)€€be€calibrated€against€site„specific€field€data;Ð ~,Ž#) ÐÐ \-l$* Ðà  àà ` àà ¸ à(E)€€have€a€sensitivity€analysis€to€measure€its€response€to€changes€in€the€valuesÐ ð Ðof€major€parameters,€error€tolerances,€and€other€parameters;Ð Î Þ ÐÌà  àà ` àà ¸ à(F)€€show€mass„balance€calculations,€where€necessary;€andÐ Š š ÐÌà  àà ` àà ¸ à(G)€€be€based€on€actual€field€or€laboratory€measurements,€or€equivalentÐ F V Ðmethods,€that€document€the€validity€of€chosen€parameter€values.Ð $4 ÐÌà  àà ` à(3)€€The€owner€or€operator€of€an€MSWLF€unit€or€facility€shall€promptly€notify€theÐ àð Ðexecutive€director€in€writing€of€changes€in€site€construction€or€operation€or€changes€in€adjacentÐ ¾Î  Ðproperty€that€affect€or€are€likely€to€affect€the€direction€and€rate€of€groundwater€flow€and€the€potentialÐ œ¬  Ðfor€detecting€groundwater€contamination€from€an€MSWLF€unit€and€that€may€require€the€installation€ofÐ zŠ  Ðadditional€monitoring€wells€or€sampling€points.€€Such€additional€wells€or€sampling€points€require€aÐ Xh  Ðmodification€of€the€site€development€plan.Ð 6F  ÐÌÔ#†<&õ%%1&õ. #ÔAdopted€August€6,€2003à€ÂÂ0(#àEffective€September€1,€2003ˆÐ ò  ÐÔ‡1&õ%%<&õÔÌò òÔ#†<&õ%%1&õÂ0#Ôðð330.233.€€Ground„Water€Sampling€and€Analysis€Requirements.ó óÐ ®¾ ÐÌà  à(a)€€The€ground„water€monitoring€program€shall€include€consistent€sampling€and€analysisÐ jz Ðprocedures€that€are€designed€to€ensure€monitoring€results€that€provide€an€accurate€representation€ofÐ HX Ðground„water€quality€at€the€background€and€downgradient€wells,€or€other€monitoring€system,€installedÐ &6 Ðin€compliance€with€ðð330.231(a)„(c)€of€this€title€(relating€to€Ground„Water€Monitoring€Systems).Ð  ÐÌà  à(b)€€The€owner€or€operator€shall€submit€a€ground„water€sampling€and€analysis€plan€(GWSAP)Ð ÀÐ Ðto€the€executive€director€for€review€and€approval€prior€to€commencement€of€sampling€and€shallÐ ž® Ðmaintain€a€current€copy€in€the€operating€record.€€The€GWSAP€shall€be€a€part€of€the€Site€DevelopmentÐ |Œ ÐPlan€(SDP);€if€necessary,€the€owner€or€operator€shall€obtain€a€modification€of€the€SDP€to€incorporateÐ Z j Ðthe€GWSAP.€€The€GWSAP€shall:Ð 8!H ÐÌà  àà ` à(1)€€include€procedures€and€techniques€for€sample€collection,€sample€preservation€andÐ ô" Ðshipment,€analytical€procedures,€chain€of€custody€controls,€and€quality€assurance€and€quality€control;Ð Ò#â ÐÌà  àà ` à(2)€€provide€for€measurement€of€ground„water€elevations€at€each€sampling€point€priorÐ Ž%ž! Ðto€bailing€or€purging;€measurement€at€an€event€shall€be€accomplished€over€a€period€of€time€shortÐ l&|" Ðenough€to€avoid€temporal€variations€in€water€levels;€sampling€at€each€event€shall€proceed€from€theÐ J'Z# Ðpoint€with€the€highest€water„level€elevation€to€those€with€successively€lower€elevations€unlessÐ ((8$ Ðcontamination€is€known€to€be€present,€in€which€case€wells€not€likely€to€be€contaminated€shall€beÐ ) % Ðsampled€prior€to€those€that€are€known€to€be€contaminated€unless€an€alternative€procedure€is€approvedÐ ä)ô & Ðby€the€executive€director;€andÐ Â*Ò!' ÐÌà  àà ` à(3)€€include€sampling€and€analytical€methods€that€are€appropriate€for€ground„waterÐ ~,Ž#) Ðsampling€and€that€accurately€measure€hazardous€constituents€and€other€monitoring€parameters€inÐ \-l$* Ðground„water€samples.€€The€number€of€samples€to€be€collected€to€establish€ground„water€quality€dataÐ ð Ðshall€be€consistent€with€the€appropriate€statistical€procedures€determined€pursuant€to€subsection€(g)€ofÐ Î Þ Ðthis€section.€€The€sampling€procedures€shall€be€those€specified€under€ðð330.234(b)€of€this€title€(relatingÐ ¬ ¼ Ðto€Detection€Monitoring€Program)€for€detection€monitoring,€ðð330.235(b)„(d)€of€this€title€(relating€toÐ Š š ÐAssessment€Monitoring€Program)€for€assessment€monitoring,€and€ðð330.236(b)€of€this€title€(relating€toÐ h x ÐAssessment€of€Corrective€Measures)€for€corrective€action.Ð F V ÐÌà  à(c)€€Ground„water€samples€shall€not€be€field„filtered€prior€to€laboratory€analysis€for€theÐ  Ðconstituents€listed€in€ðð330.241€of€this€title€(relating€to€Constituents€for€Detection€Monitoring).€€Field„Ð àð Ðfiltering€may€be€used€on€other€samples€if€authorized€in€writing€by€the€executive€director.Ð ¾Î  ÐÌà  à(d)€€The€sampling€procedures€and€frequency€shall€be€protective€of€human€health€and€theÐ zŠ  Ðenvironment.Ð Xh  ÐÌà  à(e)€€The€owner€or€operator€shall€establish€background€ground„water€quality€in€hydraulicallyÐ $  Ðupgradient€wells€or€in€background€wells€for€each€of€the€monitoring€parameters€or€constituents€requiredÐ ò  Ðin€the€ground„water€monitoring€program€for€a€MSWLF€unit,€as€determined€under€ðð330.234(a)€of€thisÐ Ðà  Ðtitle€(relating€to€Detection€Monitoring€Program)€or€ðð330.235(a)€of€this€title€(relating€to€AssessmentÐ ®¾ ÐMonitoring€Program)€and€pursuant€to€ðð330.231(a)(1)€of€this€title€(relating€to€Ground„Water€MonitoringÐ Œœ ÐSystems).€€Downgradient€ground„water€data€shall€not€be€adjusted€by€subtracting€background€ground„Ð jz Ðwater€data.Ð HX ÐÌà  à(f)€€The€owner€or€operator€shall€specify€in€the€GWSAP€one€or€more€of€the€following€statisticalÐ  Ðmethods€to€be€used€in€evaluating€ground„water€monitoring€data€for€each€parameter€or€constituentÐ âò Ðanalyzed€as€required€under€ðð330.234€of€this€title€(relating€to€Detection€Monitoring€Program)€andÐ ÀÐ Ððð330.235€of€this€title€(relating€to€Assessment€Monitoring€Program).€€The€statistical€test(s)€chosen€shallÐ ž® Ðbe€conducted€separately€for€each€tested€constituent€in€each€well€or€sampling€point.Ð |Œ ÐÌà  àà ` à(1)€€A€parametric€analysis€of€variance€(ANOVA)€followed€by€multiple„comparisonsÐ 8!H Ðprocedures€to€identify€statistically€significant€evidence€of€contamination.€€The€method€shall€includeÐ "& Ðestimation€and€testing€of€the€contrasts€between€each€downgradient€well's€mean€and€the€backgroundÐ ô" Ðmean€levels€for€each€constituent.Ð Ò#â ÐÌà  àà ` à(2)€€An€analysis€of€variance€(ANOVA)€based€on€ranks€followed€by€multiple„Ð Ž%ž! Ðcomparisons€procedures€to€identify€statistically€significant€evidence€of€contamination.€€The€methodÐ l&|" Ðshall€include€estimation€and€testing€of€the€contrasts€between€each€downgradient€well's€median€and€theÐ J'Z# Ðbackground€median€levels€for€each€constituent.Ð ((8$ ÐÌà  àà ` à(3)€€A€tolerance€or€prediction€interval€procedure€in€which€an€interval€for€eachÐ ä)ô & Ðconstituent€is€established€from€the€distribution€of€the€background€data€and€the€level€of€each€constituentÐ Â*Ò!' Ðin€each€downgradient€well€is€compared€to€the€upper€tolerance€or€prediction€limit.Ð  +°"( ÐÌà  àà ` à(4)€€A€control„chart€approach€that€gives€control€limits€for€each€constituent.Ð \-l$* Їà  àà ` à(5)€€Another€statistical€test€method€that€meets€the€performance€standards€of€subsectionÐ ð Ð(g)€of€this€section.€€The€owner€or€operator€shall€submit€to€the€executive€director€satisfactoryÐ Î Þ Ðjustification€for€this€alternative€test.Ð ¬ ¼ ÐÌà  à(g)€€Any€statistical€method€chosen€under€subsection€(f)€of€this€section€shall€comply€with€theÐ h x Ðfollowing€performance€standards,€as€appropriate.Ð F V ÐÌà  àà ` à(1)€€The€statistical€method€used€to€evaluate€ground„water€monitoring€data€shall€beÐ  Ðappropriate€for€the€distribution€of€tested€constituents.€€If€the€distribution€of€a€tested€constituent€is€shownÐ àð Ðby€the€owner€or€operator€to€be€inappropriate€for€a€normal€theory€test,€then€the€data€should€beÐ ¾Î  Ðtransformed€or€a€distribution„free€theory€test€should€be€used.€€If€the€distributions€for€the€constituentsÐ œ¬  Ðdiffer,€more€than€one€statistical€method€may€be€needed.Ð zŠ  ÐÌà  àà ` à(2)€€If€an€individual€well€(or€sampling€point)€comparison€procedure€is€used€to€compareÐ 6F  Ðan€individual€compliance€well€constituent€concentration€with€background€constituent€concentrations€orÐ $  Ða€ground„water€protection€standard,€the€test€shall€be€done€at€a€Type€I€error€level€no€less€than€0.01€forÐ ò  Ðeach€testing€period.€€If€a€multiple„comparisons€procedure€is€used,€each€testing€period€shall€be€no€lessÐ Ðà  Ðthan€0.05,€but€the€Type€I€error€of€no€less€than€0.01€for€individual€well€comparisons€shall€beÐ ®¾ Ðmaintained.€€This€performance€standard€does€not€apply€to€tolerance€intervals,€prediction€interval,€orÐ Œœ Ðcontrol€charts.Ð jz ÐÌà  àà ` à(3)€€If€a€control„chart€approach€is€used€to€evaluate€ground„water€monitoring€data,€theÐ &6 Ðspecific€type€of€control€chart€and€its€associated€parameter€values€shall€be€protective€of€human€healthÐ  Ðand€the€environment.€€These€parameters€shall€be€determined€after€considering€the€number€of€samples€inÐ âò Ðthe€background€data€base,€the€data€distribution,€and€the€range€of€the€concentration€values€for€eachÐ ÀÐ Ðconstituent€of€concern.Ð ž® ÐÌà  àà ` à(4)€€If€a€tolerance€interval€or€a€prediction€interval€is€used€to€evaluate€ground„waterÐ Z j Ðmonitoring€data,€the€levels€of€confidence,€and€for€tolerance€intervals€the€percentage€of€the€populationÐ 8!H Ðthat€the€interval€must€contain,€shall€be€protective€of€human€health€and€the€environment.€€TheseÐ "& Ðparameters€shall€be€determined€after€considering€the€number€of€samples€in€the€background€data€base,Ð ô" Ðthe€data€distribution,€and€the€range€of€the€concentration€values€for€each€constituent€of€concern.Ð Ò#â ÐÌà  àà ` à(5)€€The€statistical€method€shall€account€for€data€below€the€limit€of€detection€with€oneÐ Ž%ž! Ðor€more€statistical€procedures€that€are€protective€of€human€health€and€the€environment.€€Any€practicalÐ l&|" Ðquantitation€limit€(pql€or€PQL)€that€is€used€in€the€statistical€method€shall€be€the€lowest€concentrationÐ J'Z# Ðlevel€that€can€be€reliably€achieved€within€specified€limits€of€precision€and€accuracy€during€routineÐ ((8$ Ðlaboratory€operating€conditions€that€are€available€to€the€facility.Ð ) % ÐÌà  àà ` à(6)€€If€necessary,€the€statistical€method€shall€include€procedures€to€control€or€correctÐ Â*Ò!' Ðfor€seasonal€and€spatial€variability€as€well€as€temporal€correlation€in€the€data.Ð  +°"( Ðâ âÐ ~,Ž#) Ðà  à(h)€€The€owner€or€operator€shall€determine€within€a€reasonable€period€of€time€after€completingÐ ð Ðâ âsampling€and€analysis€whether€or€not€there€is€evidence€of€a€statistically€significant€change€fromÐ Î Þ Ðbackground€values€for€each€constituent€required€in€the€ground„water€monitoring€program€for€aÐ ¬ ¼ ÐMunicipal€Solid€Waste€Landfills€(MSWLF)€unit,€as€determined€under€ðð330.234(a)€or€ðð330.235(a)€ofÐ Š š Ðthis€title€(relating€to€Detection€Monitoring€Program€or€Assessment€Monitoring€Program).€€InÐ h x Ðdetermining€if€there€is€evidence€of€a€statistically€significant€change€from€background,€the€owner€orÐ F V Ðoperator€shall€compare€the€ground„water€quality€of€each€tested€constituent€at€each€monitoring€well€orÐ $4 Ðother€sampling€points€designated€pursuant€to€ðð330.231(a)(2)€of€this€title€(relating€to€Ground„WaterÐ  ÐMonitoring€Systems)€to€the€background€value€of€that€constituent,€according€to€the€statistical€proceduresÐ àð Ðand€performance€standards€specified€under€subsections€(f)€and€(g)€of€this€section.Ð ¾Î  ÐÌò òðð330.234.€€Detection€Monitoring€Program.ó óÐ zŠ  ÐÌà  à(a)€€Detection€monitoring€is€required€at€MSWLF€units€from€all€ground„water€monitoring€wellsÐ 6F  Ðdefined€under€ðð330.231(a)(1)„(2)€of€this€title€(relating€to€Ground„Water€Monitoring€Systems).€€At€aÐ $  Ðminimum,€a€detection€monitoring€program€shall€include€the€monitoring€for€the€constituents€listed€inÐ ò  Ððð330.241€of€this€title€(relating€to€Constituents€for€Detection€Monitoring).Ð Ðà  ÐÌà  àà ` à(1)€€The€executive€director€may€delete€any€of€the€constituents€listed€in€ðð330.241€of€thisÐ Œœ Ðtitle€(relating€to€Constituents€for€Detection€Monitoring)€for€a€MSWLF€unit€if€it€can€be€documented€thatÐ jz Ðthe€removed€constituents€are€not€reasonably€expected€to€be€in€or€derived€from€the€waste€contained€inÐ HX Ðthe€unit.Ð &6 ÐÌà  àà ` à(2)€€The€executive€director€may€establish€an€alternative€list€of€inorganic€indicatorÐ âò Ðconstituents€for€a€Municipal€Solid€Waste€Landfills€(MSWLF)€unit€in€lieu€of€some€or€all€of€the€heavyÐ ÀÐ Ðmetals€(constituents€1-15€in€ðð330.241€of€this€title€(relating€to€Constituents€for€Detection€Monitoring))€ifÐ ž® Ðthe€alternative€constituents€provide€a€reliable€indication€of€inorganic€releases€from€the€MSWLF€unit€toÐ |Œ Ðthe€ground€water.€€The€executive€director€may€also€add€inorganic€or€organic€constituents€to€those€to€beÐ Z j Ðtested€if€they€are€reasonably€expected€to€be€in€or€derived€from€the€waste€contained€in€the€unit€or€if€theyÐ 8!H Ðare€likely€to€provide€a€useful€indication€of€releases€from€the€MSWLF€unit€to€the€ground€water.€€InÐ "& Ðdetermining€alternative€or€additional€constituents,€the€executive€director€shall€consider€the€followingÐ ô" Ðfactors:Ð Ò#â ÐÌà  àà ` àà ¸ à(A)€€the€types,€concentrations,€quantities,€and€persistence€of€waste€constituentsÐ Ž%ž! Ðin€wastes€at€the€MSWLF€unit;Ð l&|" ÐÌà  àà ` àà ¸ à(B)€€the€mobility,€stability,€and€persistence€of€waste€constituents€or€theirÐ ((8$ Ðreaction€products€in€the€unsaturated€and€saturated€zones€adjacent€to€or€beneath€the€MSWLF€unit;Ð ) % ÐÌà  àà ` àà ¸ à(C)€€the€detectability€of€indicator€constituents,€waste€constituents,€and€reactionÐ Â*Ò!' Ðproducts€in€the€ground€water;€andÐ  +°"( Ðâ âÐ ~,Ž#) Ðà  àà ` àà ¸ à(D)€€the€concentrations€and€coefficients€of€variation€of€monitoring€parametersÐ ð Ðâ âor€constituents€in€the€ground„water€background.Ð Î Þ ÐÌà  à(b)€€The€monitoring€frequency€for€all€constituents€listed€in€ðð330.241€of€this€title€(relating€toÐ Š š ÐConstituents€for€Detection€Monitoring)€,€or€in€the€alternative€list€established€pursuant€to€subsectionÐ h x Ð(a)(2)€of€this€section,€shall€be€at€least€semiannual€during€the€active€life€of€the€facility€and€the€closureÐ F V Ðand€post„closure€care€period.Ð $4 ÐÌà  àà ` à(1)€€A€minimum€of€four€statistically€independent€samples€from€each€background€andÐ àð Ðeach€downgradient€well€shall€be€collected€and€analyzed€for€the€constituents€listed€in€ðð330.241€of€thisÐ ¾Î  Ðtitle€(relating€to€Constituents€for€Detection€Monitoring),€or€the€alternative€list€established€pursuant€toÐ œ¬  Ðsubsection€(a)(2)€of€this€section,€during€the€first€semiannual€sampling€event.€€The€independence€of€theÐ zŠ  Ðfour€samples€shall€be€achieved€by€bailing€or€purging€at€least€three€well€volumes€(or€to€dryness,€if€less)Ð Xh  Ðfrom€each€well€before€each€of€the€four€samples€is€collected.€€The€executive€director€may€authorizeÐ 6F  Ðalternate€procedures€for€slow„recharging€monitoring€wells.€€At€least€one€sample€from€each€backgroundÐ $  Ðand€downgradient€well€shall€be€collected€and€analyzed€during€each€subsequent€semiannual€samplingÐ ò  Ðevent.Ð Ðà  ÐÌà  àà ` à(2)€€The€executive€director€may€specify€an€appropriate€alternative€frequency€forÐ Œœ Ðrepeated€sampling€and€analysis€of€the€constituents€listed€in€ðð330.241€of€this€title€(relating€toÐ jz ÐConstituents€for€Detection€Monitoring),€or€in€the€alternative€list€established€pursuant€to€subsectionÐ HX Ð(a)(2)€of€this€section,€during€the€active€life€and€the€closure€and€post„closure€care€period.€€TheÐ &6 Ðalternative€frequency€shall€be€no€less€than€annual€and€shall€be€based€on€factors€such€as€lithology€andÐ  Ðhydraulic€conductivity€of€the€aquifer€and€unsaturated€zone,€ground„water€flow€rates,€minimum€distanceÐ âò Ðof€travel€from€waste€to€monitoring€wells,€and€resource€value€of€the€uppermost€aquifer.Ð ÀÐ ÐÌà  àà ` à(3)€€For€the€purpose€of€establishing€background€ground„water€quality,€the€executiveÐ |Œ Ðdirector€may€agree€to€consider€analytical€data€acquired€prior€to€the€effective€date€of€this€title€in€additionÐ Z j Ðto€the€data€required€in€this€subsection€and€in€subsection€ðð330.235(b)€of€this€title€(relating€to€AssessmentÐ 8!H ÐMonitoring€Program).Ð "& ÐÌà  à(c)€€Not€later€than€45€days€after€each€sampling€event,€the€owner€or€operator€shall€submit€to€theÐ Ò#â Ðexecutive€director€a€report€containing€the€results€of€the€analyses.Ð °$À  ÐÌà  à(d)€€Not€later€than€60€days€after€each€sampling€event,€the€owner€or€operator€shall€notify€theÐ l&|" Ðexecutive€director€in€writing€if€there€has€been€a€statistically€significant€change€from€background€of€anyÐ J'Z# Ðtested€constituent€at€any€monitoring€well.Ð ((8$ ÐÌà  àà ` à(1)€€If€a€statistically€significant€change€from€background€of€any€tested€constituent€at€anyÐ ä)ô & Ðmonitoring€well€has€occurred,€the€owner€or€operator€shall€immediately€place€a€notice€in€the€operatingÐ Â*Ò!' Ðrecord€describing€the€increase€and€shall€establish€an€assessment€monitoring€program€meeting€theÐ  +°"( Ðâ ârequirements€of€ðð330.235€of€this€title€(relating€to€Assessment€Monitoring€Program)€within€90€days€ofÐ ~,Ž#) Ðthe€date€of€the€notice€to€the€executive€director€required€under€subsection€(d)€of€this€section,€except€asÐ ð Ðprovided€for€in€paragraph€(2)€of€this€subsection.Ð Î Þ Ðâ âÌà  àà ` à(2)€€If€a€statistically€significant€change€from€background€of€any€tested€constituent€at€anyÐ Š š Ðmonitoring€well€has€occurred€and€the€owner€or€operator€has€reasonable€cause€to€think€that€a€sourceÐ h x Ðother€than€a€MSWLF€unit€caused€the€contamination€or€that€the€statistically€significant€change€resultedÐ F V Ðfrom€error€in€sampling,€analysis,€statistical€evaluation,€or€natural€variation€in€ground„water€quality,Ð $4 Ðthen€the€owner€or€operator€may€submit€a€report€providing€documentation€to€this€effect.€€The€reportÐ  Ðshall€be€prepared€and€certified€by€a€qualified€ground„water€scientist€and€submitted€to€the€executiveÐ àð Ðdirector€for€review€and€approval€not€later€than€90€days€after€the€sampling€event.€€If€no€suchÐ ¾Î  Ðdemonstration€satisfactory€to€the€executive€director€has€been€made€within€90€days€after€the€samplingÐ œ¬  Ðevent,€the€owner€or€operator€shall€initiate€an€assessment€monitoring€program€as€required€in€paragraphÐ zŠ  Ð(1)€of€this€subsection.Ð Xh  ÐÌò òÔ& š Ôðð330.235.€€Assessment€Monitoring€Program.ó óÐ $  ÐÌÔ'šm|ÔÔ‡1&õ%%<&õÔà  à(a)€€Assessment€monitoring€is€required€whenever€a€statistically€significant€change€fromÐ Ðà  Ðbackground€has€been€detected€for€one€or€more€of€the€constituents€listed€in€ðð330.241€of€this€titleÐ ®¾ Ð(relating€to€Constituents€for€Detection€Monitoring),€or€in€the€alternative€list€established€in€accordanceÐ Œœ Ðwith€ðð330.234(a)(2)€of€this€title€(relating€to€Detection€Monitoring€Program),€and€this€constitutesÐ jz Ðtriggering.Ð HX ÐÌà  à(b)€€Within€90€days€of€triggering€an€assessment€monitoring€program€in€accordance€withÐ  Ððð330.234(d)€of€this€title,€and€not€less€than€annually€thereafter,€the€owner€or€operator€shall€sample€andÐ âò Ðanalyze€the€groundwater€monitoring€system€for€all€constituents€identified€in€paragraph€(1)€of€thisÐ ÀÐ Ðsubsection.Ð ž® ÐÌà  àà ` à(1)€€The€constituents€to€be€analyzed€in€samples€collected€in€accordance€with€subsectionÐ Z j Ð(b)€of€this€section€shall€be€those€listed€in€Appendix€II€to€40€Code€of€Federal€Regulations€(CFR)€PartÐ 8!H Ð258€and€those€in€the€alternative€list€established€in€accordance€with€ðð330.234(a)(2)€of€this€title.€€All€ofÐ "& Ðthese€constituents€are€hereinafter€referred€as€"assessment€constituents."€€Appendix€II€to€40€CFR€PartÐ ô" Ð258,€effective€October€9,€1993,€is€herein€adopted€by€reference.Ð Ò#â ÐÌà  àà ` à(2)€€A€minimum€of€one€sample€shall€be€collected€from€each€well€and€analyzed€for€theÐ Ž%ž! Ðassessment€constituents€during€each€new€sampling€event.€€For€any€constituent(s)€detected€in€theÐ l&|" Ðdowngradient€wells€as€a€result€of€the€analysis€of€the€assessment€constituents,€a€minimum€of€fourÐ J'Z# Ðstatistically€independent€samples€from€each€background€and€downgradient€well€shall€be€collected€andÐ ((8$ Ðanalyzed€to€establish€background€levels€for€the€constituent(s).€€The€executive€director€may€specify€anÐ ) % Ðappropriate€subset€of€wells€to€be€sampled€and€analyzed€for€the€assessment€constituents€duringÐ ä)ô & Ðassessment€monitoring€and€may€delete€any€of€the€assessment€constituents€for€a€municipal€solid€wasteÐ Â*Ò!' Ðlandfill€(MSWLF)€unit€if€it€can€be€documented€that€the€removed€constituents€are€not€reasonablyÐ  +°"( Ðexpected€to€be€in€or€derived€from€the€waste€contained€in€the€unit.Ð ~,Ž#) ÐÐ \-l$* Ðà  à(c)€€The€executive€director€may€specify€an€appropriate€alternative€frequency€for€repeatedÐ ð Ðsampling€and€analysis€for€the€assessment€constituents€required€by€subsection€(b)€of€this€section€duringÐ Î Þ Ðthe€active€life€and€the€closure€and€post„closure€care€period€of€the€unit.€€The€alternative€frequency€shallÐ ¬ ¼ Ðbe€no€less€than€annual€and€shall€be€based€on€factors€such€as€lithology€and€hydraulic€conductivity€of€theÐ Š š Ðaquifer€and€unsaturated€zone,€groundwater€flow€rates,€minimum€distance€of€travel€from€the€wasteÐ h x Ðnearest€to€any€downgradient€monitoring€well,€resource€value€of€the€uppermost€aquifer,€and€nature€(fateÐ F V Ðand€transport)€of€any€constituents€detected€in€response€to€this€section.Ð $4 ÐÌà  à(d)€€Not€later€than€45€days€after€each€sampling€event,€the€owner€or€operator€shall€submit€to€theÐ àð Ðexecutive€director€the€results€from€the€initial€and€subsequent€sampling€events€required€in€subsection€(b)Ð ¾Î  Ðof€this€section€and€also€place€them€in€the€operating€record.€€The€owner€or€operator€shall€also:Ð œ¬  ÐÌà  àà ` à(1)€€within€90€days€of€submittal€of€the€results€from€a€sampling€event€and€on€at€least€aÐ Xh  Ðsemiannual€basis€thereafter,€resample€all€wells€specified€by€ðð330.231(a)€of€this€title€(relating€toÐ 6F  ÐGroundwater€Monitoring€Systems)€and€conduct€analyses€for€all€constituents€in€ðð330.241€of€this€title€orÐ $  Ðin€the€alternative€list€established€in€accordance€with€ðð330.234(a)(2)€of€this€title€and€for€thoseÐ ò  Ðconstituents€in€Appendix€II€of€40€CFR€Part€258€that€are€detected€in€response€to€subsection€(b)€of€thisÐ Ðà  Ðsection.€€The€results€must€be€submitted€to€the€executive€director€not€later€than€45€days€after€theÐ ®¾ Ðsampling€event€and€shall€also€be€placed€in€the€operating€record.€€At€least€one€sample€must€be€collectedÐ Œœ Ðand€analyzed€from€each€background€and€downgradient€well€at€each€sampling€event.€€The€executiveÐ jz Ðdirector€may€specify€an€alternative€monitoring€frequency€during€the€active€life€and€the€closure€andÐ HX Ðpost„closure€care€period€for€the€constituents€referred€to€in€this€paragraph.€€The€alternative€frequencyÐ &6 Ðfor€constituents€in€ðð330.241€of€this€title,€or€the€alternative€list€established€in€accordance€withÐ  Ððð330.234(a)(2)€of€this€title,€during€the€active€life€and€the€closure€and€post„closure€care€period€shall€beÐ âò Ðnot€less€than€annual.€€The€alternative€frequency€shall€be€based€on€consideration€of€the€factors€describedÐ ÀÐ Ðin€subsection€(c)€of€this€section;Ð ž® ÐÌà  àà ` à(2)€€establish€background€concentrations€for€any€constituents€detected€in€accordanceÐ Z j Ðwith€subsection€(b)€of€this€section€or€paragraph€(1)€of€this€subsection;Ð 8!H ÐÌà  àà ` à(3)€€establish€groundwater€protection€standards€for€all€constituents€in€downgradientÐ ô" Ðwells€detected€in€accordance€with€subsection€(b)€of€this€section€or€paragraph€(1)€of€this€subsection.€Ð Ò#â ÐThe€groundwater€protection€standards€shall€be€established€in€accordance€with€subsection€(h)€or€(i)€ofÐ °$À  Ðthis€section.Ð Ž%ž! ÐÌà  à(e)€€If€the€concentrations€of€all€assessment€constituents€are€shown€to€be€at€or€below€backgroundÐ J'Z# Ðvalues,€using€the€statistical€procedures€in€ðð330.233(g)€of€this€title€(relating€to€Groundwater€SamplingÐ ((8$ Ðand€Analysis€Requirements)€for€two€consecutive€sampling€events,€the€owner€or€operator€must€notifyÐ ) % Ðthe€executive€director€in€writing€and€return€to€detection€monitoring€if€approved.Ð ä)ô & ÐÌà  à(f)€€If€the€concentrations€of€any€assessment€constituents€are€above€background€values,€but€allÐ  +°"( Ðâ âconcentrations€are€below€the€groundwater€protection€standard€established€under€subsection€(h)€or€(i)€ofÐ ~,Ž#) Ðthis€section,€using€the€statistical€procedures€in€ðð330.233(g)€of€this€title,€the€owner€or€operator€shallÐ ð Ðcontinue€assessment€monitoring€in€accordance€with€this€section.Ð Î Þ Ðâ âÌà  à(g)€€If€one€or€more€assessment€constituents€are€detected€at€statistically€significant€levels€aboveÐ Š š Ðthe€groundwater€protection€standard€established€under€subsection€(h)€or€(i)€of€this€section€in€anyÐ h x Ðsampling€event,€the€owner€or€operator€shall€notify€the€executive€director€and€appropriate€localÐ F V Ðgovernment€officials€in€writing€and€place€a€notice€in€the€operating€record€within€60€days€of€theÐ $4 Ðsampling€event€identifying€the€assessment€constituents€that€have€exceeded€the€groundwater€protectionÐ  Ðstandard.Ð àð ÐÌà  àà ` à(1)€€The€owner€or€operator€shall€also:Ð œ¬  ÐÌà  àà ` àà ¸ à(A)€€characterize€the€nature€and€extent€of€the€release€by€installing€additionalÐ Xh  Ðmonitoring€wells€as€necessary;Ð 6F  ÐÌà  àà ` àà ¸ à(B)€€install€at€least€one€additional€monitoring€well€at€the€facility€boundary€in€theÐ ò  Ðdirection€of€contaminant€migration€and€sample€this€well€in€accordance€with€ðð330.235(d)(1)€of€this€titleÐ Ðà  Ð(relating€to€Assessment€Monitoring€Program);Ð ®¾ ÐÌà  àà ` àà ¸ à(C)€€notify€in€writing€all€persons€who€own€or€occupy€the€land€that€directlyÐ jz Ðoverlies€any€part€of€the€plume€of€contamination€if€contaminants€have€migrated€off€site€as€indicated€byÐ HX Ðsampling€of€wells€in€accordance€with€subsection€(d)(1)€of€this€section;€andÐ &6 ÐÌà  àà ` àà ¸ à(D)€€initiate€an€assessment€of€corrective€measures€as€required€by€ðð330.236€ofÐ âò Ðthis€title€(relating€to€Assessment€of€Corrective€Measures)€all€within€90€days€of€the€notice€to€theÐ ÀÐ Ðexecutive€director.Ð ž® ÐÌà  àà ` à(2)€€The€owner€or€operator€may€demonstrate€that€a€source€other€than€an€MSWLF€unitÐ Z j Ðcaused€the€contamination€or€that€the€statistically€significant€change€resulted€from€error€in€sampling,Ð 8!H Ðanalysis,€statistical€evaluation,€or€natural€variation€in€groundwater€quality.€€A€report€documenting€this€Ð "& Ðdemonstration€must€be€prepared€and€certified€by€a€qualified€groundwater€scientist€and€submitted€to€theÐ ô" Ðexecutive€director€for€review€and€approval,€and€must€be€placed€in€the€operating€record.€€If€a€successfulÐ Ò#â Ðdemonstration€is€made,€the€owner€or€operator€shall€continue€monitoring€in€accordance€with€theÐ °$À  Ðassessment€monitoring€program€required€by€this€section€and€may€return€to€detection€monitoring€if€theÐ Ž%ž! Ðassessment€constituents€are€at€or€below€background€as€specified€in€subsection€(e)€of€this€section.€€UntilÐ l&|" Ða€successful€demonstration€is€made,€the€owner€or€operator€shall€comply€with€paragraph€(1)€of€thisÐ J'Z# Ðsubsection€including€initiating€an€assessment€of€corrective€measures.Ð ((8$ ÐÌà  à(h)€€The€owner€or€operator€shall€establish€a€groundwater€protection€standard€for€eachÐ ä)ô & Ðassessment€constituent€detected€in€the€downgradient€monitoring€wells.€€The€groundwater€protectionÐ Â*Ò!' Ðstandard€must€be:Ð  +°"( Ðâ âÐ ~,Ž#) Ðà  àà ` à(1)€€for€constituents€for€which€a€maximum€contaminant€level€(MCL)€has€beenÐ ð Ðâ âpromulgated€under€40€CFR€Part€141,€Safe€Drinking€Water€Act€(codified),€ðð1412,€the€MCL€for€thatÐ Î Þ Ðconstituent;Ð ¬ ¼ ÐÌà  àà ` à(2)€€for€constituents€for€which€MCLs€have€not€been€promulgated,€the€backgroundÐ h x Ðconcentration€for€the€constituent€established€from€wells€in€accordance€with€ðð330.231(a)(1)€of€this€title;Ð F V ÐorÐ $4 ÐÌà  àà ` à(3)€€for€constituents€for€which€the€background€level€is€higher€than€the€MCL€identifiedÐ àð Ðunder€paragraph€(1)€of€this€subsection€or€health„based€levels€identified€under€subsection€(i)€of€thisÐ ¾Î  Ðsection,€the€background€concentration.Ð œ¬  ÐÌà  à(i)€€The€executive€director€may€establish€an€alternative€groundwater€protection€standard€forÐ Xh  Ðassessment€constituents€for€which€MCLs€have€not€been€established.€€These€groundwater€protectionÐ 6F  Ðstandards€shall€be€appropriate€health„based€levels€that€satisfy€the€following€criteria:Ð $  ÐÌà  àà ` à(1)€€the€level€is€derived€in€a€manner€consistent€with€EPA€guidelines€for€assessing€theÐ Ðà  Ðhealth€risks€of€environmental€pollutants€(51€FR€33992,€34006,€34014,€34028,€September€24,€1986);Ð ®¾ ÐÌà  àà ` à(2)€€the€level€is€based€on€scientifically€valid€studies€conducted€in€accordance€with€theÐ jz ÐToxic€Substances€Control€Act€Good€Laboratory€Practice€Standards€(40€(CFR)€Part€792)€or€equivalent;Ð HX ÐÌà  àà ` à(3)€€for€carcinogens,€the€level€represents€a€concentration€associated€with€an€excessÐ  Ðlifetime€cancer€risk€level€(due€to€continuous€lifetime€exposure)€with€the€1x10òò„4óó€to€1x10òò„6óó€range;€andÐ âò ÐÌà  àà ` à(4)€€for€systemic€toxicants,€the€level€represents€a€concentration€to€which€the€humanÐ ž® Ðpopulation€(including€sensitive€subgroups)€could€be€exposed€to€on€a€daily€basis€that€is€likely€to€beÐ |Œ Ðwithout€appreciable€risk€of€deleterious€effects€during€a€lifetime.€€For€purposes€of€this€subchapter,Ð Z j Ðsystemic€toxicants€include€toxic€chemicals€that€cause€effects€other€than€cancer€or€mutation.Ð 8!H ÐÌà  à(j)€€In€establishing€groundwater€protection€standards€under€subsection€(i)€of€this€section,€theÐ ô" Ðexecutive€director€may€consider€multiple€contaminants€in€the€groundwater,€exposure€threats€to€sensitiveÐ Ò#â Ðenvironmental€receptors,€and€other€site„specific€exposure€or€potential€exposure€to€groundwater.Ð °$À  ÐÔ#†<&õ%%1&õÑ|#ÔÌAdopted€August€6,€2003à€ÂÂ0(#àEffective€September€1,€2003ˆÐ l&|" ÐÌò òÔ& V Ôðð330.236.€€Assessment€of€Corrective€Measures.ó óÐ ((8$ ÐÌà  à(a)€€Within€90€days€of€finding€that€any€of€the€assessment€constituents€have€been€detected€at€aÐ ä)ô & Ðstatistically€significant€level€exceeding€the€ground„water€protection€standards€defined€underÐ Â*Ò!' ÐÔ'V((:±Ôðð330.235(h)€or€(i)€of€this€title€(relating€to€Assessment€Monitoring€Program),€the€owner€or€operatorÐ  +°"( Ðshall€initiate€an€assessment€of€corrective€measures.€€Such€an€assessment€shall€be€completed€within€aÐ ~,Ž#) Ðreasonable€period€of€time€approved€by€the€executive€director.Ð \-l$* Їà  à(b)€€The€owner€or€operator€shall€continue€to€monitor€in€accordance€with€the€assessmentÐ ð Ðmonitoring€program€as€specified€in€ðð330.235€of€this€title€(relating€to€Assessment€Monitoring€Program).Ð Î Þ ÐÌà  à(c)€€The€assessment€shall€include€an€analysis€of€the€effectiveness€of€potential€correctiveÐ Š š Ðmeasures€in€meeting€all€of€the€requirements€and€objectives€of€the€remedy€as€described€under€ðð330.237Ð h x Ðof€this€title€(relating€to€Selection€of€Remedy),€addressing€at€least€the€following:Ð F V ÐÌà  àà ` à(1)€€performance,€reliability,€ease€of€implementation,€and€potential€impacts€ofÐ  Ðappropriate€potential€remedies,€including€safety€impacts,€cross„media€impacts,€and€control€of€exposureÐ àð Ðto€any€residual€contamination;Ð ¾Î  ÐÌà  àà ` à(2)€€time€required€to€begin€and€complete€the€remedy;Ð zŠ  ÐÌà  àà ` à(3)€€costs€of€remedy€implementation;€andÐ 6F  ÐÌà  àà ` à(4)€€institutional€requirements€such€as€state€or€local€permit€requirements€or€otherÐ ò  Ðenvironmental€or€public€health€requirements€that€may€substantially€affect€implementation€of€the€remedyÐ Ðà  Ðor€remedies.Ð ®¾ ÐÌà  à(d)€€The€owner€or€operator€shall€discuss€the€results€of€the€corrective€measures€assessment,Ð jz Ðprior€to€the€selection€of€a€remedy,€in€a€public€meeting€with€interested€and€affected€parties.€€The€ownerÐ HX Ðor€operator€shall€arrange€for€the€meeting€and€provide€notice€in€accordance€with€the€provisions€of€ðð305.Ð &6 Ð107(c)€of€this€title€(relating€to€Public€Meeting€and€Notification€Requirements).Ð  ÐÌò òðð330.237.€€Selection€of€Remedy.ó óÐ ÀÐ ÐÌà  à(a)€€Based€on€the€results€of€the€corrective€measures€assessment€conducted€under€ðð330.236€ofÐ |Œ Ðthis€title€(relating€to€Assessment€of€Corrective€Measures)€,€the€owner€or€operator€shall€select€a€remedyÐ Z j Ðthat,€at€a€minimum,€meets€the€standards€listed€in€subsection€(b)€of€this€section€and€is€in€accordanceÐ 8!H Ðwith€rules€of€the€commission.€€Within€30€days€of€completing€the€assessment€of€corrective€actionÐ "& Ðdescribed€in€ðð330.236€of€this€title€(relating€to€Assessment€of€Corrective€Measures),€the€owner€orÐ ô" Ðoperator€shall€submit€a€report€to€the€executive€director€for€review€and€approval€and€place€it€in€theÐ Ò#â Ðoperating€record.€The€report€shall€describe€the€remedy€or€remedies€proposed€for€selection€and€the€wayÐ °$À  Ðit€or€they€meet€the€standards€in€subsection€(b)€of€this€section.Ð Ž%ž! ÐÌà  à(b)€€Remedies€shall:Ð J'Z# ÐÌà  àà ` à(1)€€be€protective€of€human€health€and€the€environment;Ð ) % ÐÌà  àà ` à(2)€€attain€the€ground„water€protection€standard€as€specified€pursuant€to€ðð330.235(h)€orÐ Â*Ò!' Ð(i)€of€this€title€(relating€to€Assessment€Monitoring€Program);Ð  +°"( Ðâ âÐ ~,Ž#) Ðà  àà ` à(3)€€control€the€source(s)€of€releases€so€as€to€reduce€or€eliminate,€to€the€maximumÐ ð Ðâ âextent€practicable,€further€releases€of€assessment€constituents€into€the€environment€that€may€pose€aÐ Î Þ Ðthreat€to€human€health€or€the€environment;€andÐ ¬ ¼ ÐÌà  àà ` à(4)€€comply€with€standards€for€management€of€wastes€as€specified€in€ðð330.238(d)€ofÐ h x Ðthis€title€(relating€to€Implementation€of€the€Corrective€Action€Program).Ð F V ÐÌà  à(c)€€In€selecting€a€remedy€that€meets€the€standards€of€subsection€(b)€of€this€section,€the€ownerÐ  Ðor€operator€shall€consider€the€following€evaluation€factors:Ð àð ÐÌà  àà ` à(1)€€long„and€short„term€effectiveness€and€protectiveness€of€the€potential€remedy,€alongÐ œ¬  Ðwith€the€degree€of€certainty€that€the€remedy€will€prove€successful€based€on€consideration€of:Ð zŠ  ÐÌà  àà ` àà ¸ à(A)€€magnitude€of€reduction€of€existing€risks;Ð 6F  ÐÌà  àà ` àà ¸ à(B)€€magnitude€of€residual€risks€in€terms€of€likelihood€of€further€releases€due€toÐ ò  Ðwaste€remaining€following€implementation€of€a€remedy;Ð Ðà  ÐÌà  àà ` àà ¸ à(C)€€type€and€degree€of€long„term€management€required,€including€monitoring,Ð Œœ Ðoperation,€and€maintenance;Ð jz ÐÌà  àà ` àà ¸ à(D)€€short„term€risks€that€might€be€posed€to€the€community,€workers,€or€theÐ &6 Ðenvironment€during€implementation€of€such€a€remedy,€including€potential€threats€to€human€health€andÐ  Ðthe€environment€associated€with€excavation,€transportation,€redisposal,€or€containment;Ð âò ÐÌà  àà ` àà ¸ à(E)€€time€until€full€protection€is€achieved;Ð ž® ÐÌà  àà ` àà ¸ à(F)€€potential€for€exposure€of€humans€and€environmental€receptors€to€remainingÐ Z j Ðwastes,€considering€potential€threats€to€human€health€and€the€environment€associated€with€excavation,Ð 8!H Ðtransportation,€redisposal,€or€containment;Ð "& ÐÌà  àà ` àà ¸ à(G)€€long„term€reliability€of€the€engineering€and€institutional€controls;€andÐ Ò#â ÐÌà  àà ` àà ¸ à(H)€€potential€need€for€replacement€of€the€remedy;Ð Ž%ž! ÐÌà  àà ` à(2)€€effectiveness€of€the€remedy€in€controlling€the€source€to€reduce€further€releasesÐ J'Z# Ðbased€on€the€extent€to€which€containment€practices€will€reduce€further€releases€and€the€extent€to€whichÐ ((8$ Ðtreatment€technologies€may€be€used;Ð ) % ÐÌà  àà ` à(3)€€ease€or€difficulty€of€implementing€a€potential€remedy€based€on€consideration€of:Ð Â*Ò!' ÐÌà  àà ` àà ¸ à(A)€€degree€of€difficulty€associated€with€constructing€the€technology;Ð ~,Ž#) ÐÐ \-l$* Ðà  àà ` àà ¸ à(B)€€expected€operational€reliability€of€the€technologies;Ð ð ÐÌà  àà ` àà ¸ à(C)€€need€to€coordinate€with€and€obtain€necessary€approvals€and€permits€fromÐ ¬ ¼ Ðother€agencies€and€regulatory€bodies;Ð Š š ÐÌà  àà ` àà ¸ à(D)€€availability€of€necessary€equipment€and€specialists;€andÐ F V ÐÌà  àà ` àà ¸ à(E)€€available€capacity€and€location€of€needed€treatment,€storage,€and€disposalÐ  Ðservices;Ð àð ÐÌà  àà ` à(4)€€practicable€capability€of€the€owner€or€operator,€including€a€consideration€of€theÐ œ¬  Ðtechnical€and€economic€capability;Ð zŠ  ÐÌà  àà ` à(5)€€degree€to€which€community€concerns€are€addressed€by€a€potential€remedy.Ð 6F  ÐÌà  à(d)€€The€owner€or€operator€shall€specify€as€part€of€the€selected€remedy€a€schedule€for€initiatingÐ ò  Ðand€completing€remedial€activities.€€The€schedule€shall€require€the€initiation€of€remedial€activitiesÐ Ðà  Ðwithin€a€reasonable€time€approved€by€the€executive€director,€taking€into€consideration€the€factors€setÐ ®¾ Ðforth€in€paragraphs€(1)„(8)€of€this€subsection.€€The€owner€or€operator€shall€consider€the€followingÐ Œœ Ðfactors€in€determining€the€schedule:Ð jz ÐÌà  àà ` à(1)€€extent€and€nature€of€contamination;Ð &6 ÐÌà  àà ` à(2)€€practical€capabilities€of€remedial€technologies€in€achieving€compliance€withÐ âò Ðground„water€protection€standards€established€under€ðð330.235(h)€or€(i)€of€this€title€(relating€toÐ ÀÐ ÐAssessment€Monitoring€Program)€and€other€objectives€of€the€remedy;Ð ž® ÐÌà  àà ` à(3)€€availability€of€treatment€or€disposal€capacity€for€wastes€managed€duringÐ Z j Ðimplementation€of€the€remedy;Ð 8!H ÐÌà  àà ` à(4)€€desirability€of€utilizing€technologies€that€are€not€currently€available€but€which€mayÐ ô" Ðoffer€significant€advantages€over€available€technologies€in€terms€of€effectiveness,€reliability,€safety,€orÐ Ò#â Ðability€to€achieve€remedial€objectives;Ð °$À  ÐÌà  àà ` à(5)€€potential€risks€to€human€health€and€the€environment€from€exposure€toÐ l&|" Ðcontamination€prior€to€completion€of€the€remedy;Ð J'Z# ÐÌà  àà ` à(6)€€resource€value€of€the€aquifer€including€current€and€future€uses;€proximity€andÐ ) % Ðwithdrawal€rate€of€users;€ground„water€quantity€and€quality;€potential€damage€to€wildlife,€crops,Ð ä)ô & Ðvegetation,€and€physical€structures€from€exposure€to€waste€constituents;€hydrogeologic€characteristicsÐ Â*Ò!' Ðof€the€facility€and€adjacent€land;€ground„water€removal€and€treatment€costs;€and€cost€and€availability€ofÐ  +°"( Ðalternative€water€supplies;Ð ~,Ž#) ÐÐ \-l$* Ðà  àà ` à(7)€€practicable€capability€of€the€owner€or€operator;€andÐ ð ÐÌà  àà ` à(8)€€other€relevant€factors.Ð ¬ ¼ ÐÌà  à(e)€€The€executive€director€may€determine€that€remediation€of€a€release€of€an€assessmentÐ h x Ðconstituent€from€a€MSWLF€unit€is€not€necessary€if€the€owner€or€operator€demonstrates€to€theÐ F V Ðsatisfaction€of€the€executive€director€that:Ð $4 ÐÌà  àà ` à(1)€€the€ground„water€is€additionally€contaminated€by€substances€that€have€originatedÐ àð Ðfrom€a€source€other€than€a€MSWLF€unit€and€those€substances€are€present€in€concentrations€such€thatÐ ¾Î  Ðcleanup€of€the€release€from€the€MSWLF€unit€would€provide€no€significant€reduction€in€risk€to€actual€orÐ œ¬  Ðpotential€receptors;€orÐ zŠ  ÐÌà  àà ` à(2)€€the€constituent€is€present€in€ground€water€that€is€not€currently€or€reasonablyÐ 6F  Ðexpected€to€be€a€source€of€drinking€water€and€is€not€hydraulically€connected€with€waters€to€which€theÐ $  Ðconstituent€is€migrating€or€is€likely€to€migrate€in€a€concentration€that€would€exceed€the€ground„waterÐ ò  Ðprotection€standards€established€under€ðð330.235(h)€or€(i)€of€this€title€(relating€to€AssessmentÐ Ðà  ÐMonitoring€Program);€orÐ ®¾ ÐÌà  àà ` à(3)€€remediation€of€the€release€is€technically€impracticable;€orÐ jz ÐÌà  àà ` à(4)€€remediation€of€the€release€results€in€unacceptable€cross„media€impacts.Ð &6 ÐÌà  à(f)€€A€determination€by€the€executive€director€pursuant€to€subsection€(e)€of€this€section€shall€notÐ âò Ðaffect€the€authority€of€the€state€to€require€the€owner€or€operator€to€undertake€source„control€measuresÐ ÀÐ Ðor€other€measures€that€may€be€necessary€to€eliminate€or€minimize€further€releases€to€the€ground€water,Ð ž® Ðto€prevent€exposure€to€the€ground€water,€or€to€remediate€the€ground€water€to€concentrations€that€areÐ |Œ Ðtechnically€practicable€and€that€significantly€reduce€threats€to€human€health€or€the€environment.€Ð Z j ÐÌò òðð330.238.€€Implementation€of€the€Corrective€Action€Program.ó óÐ "& ÐÌÔ‡1&õ%%<&õÔà  à(a)€€Based€on€the€schedule€established€under€ðð330.237(d)€of€this€title€(relating€to€Selection€ofÐ Ò#â ÐRemedy)€for€initiation€and€completion€of€remedial€activities,€the€owner€or€operator€shall:Ð °$À  ÐÌà  àà ` à(1)€€establish€and€implement€a€corrective€action€groundwater€monitoring€program€that:Ð l&|" ÐÌà  àà ` àà ¸ à(A)€€at€least€meets€the€requirements€of€an€assessment€monitoring€programÐ ((8$ Ðunder€ðð330.235€of€this€title€(relating€to€Assessment€Monitoring€Program);Ð ) % ÐÌà  àà ` àà ¸ à(B)€€indicates€the€effectiveness€of€the€corrective€action€remedy;€andÐ Â*Ò!' ÐÌà  àà ` àà ¸ à(C)€€demonstrates€compliance€with€groundwater€protection€standards€underÐ ~,Ž#) Ðsubsection€(e)€of€this€section;Ð \-l$* Їà  àà ` à(2)€€implement€the€corrective€action€remedy€selected€under€ðð330.237€of€this€title;€andÐ ð ÐÌà  àà ` à(3)€€take€any€interim€measures€necessary€to€ensure€the€protection€of€human€health€andÐ ¬ ¼ Ðthe€environment.€€Interim€measures€should,€to€the€greatest€extent€practicable,€be€consistent€with€theÐ Š š Ðobjectives€of€and€contribute€to€the€performance€of€any€remedy€that€may€be€required€under€ðð330.237€ofÐ h x Ðthis€title.€€The€following€factors€shall€be€considered€by€an€owner€or€operator€in€determining€if€interimÐ F V Ðmeasures€are€necessary:Ð $4 ÐÌà  àà ` àà ¸ à(A)€€time€required€to€develop€and€implement€a€final€remedy;Ð àð ÐÌà  àà ` àà ¸ à(B)€€actual€or€potential€exposure€of€nearby€populations€or€environmentalÐ œ¬  Ðreceptors€to€hazardous€constituents;Ð zŠ  ÐÌà  àà ` àà ¸ à(C)€€actual€or€potential€contamination€of€drinking„water€supplies€or€sensitiveÐ 6F  Ðecosystems;Ð $  ÐÌà  àà ` àà ¸ à(D)€€further€degradation€of€the€groundwater€that€may€occur€if€remedial€actionÐ Ðà  Ðis€not€initiated€expeditiously;Ð ®¾ ÐÌà  àà ` àà ¸ à(E)€€weather€conditions€that€may€cause€hazardous€constituents€to€migrate€or€beÐ jz Ðreleased;Ð HX ÐÌà  àà ` àà ¸ à(F)€€risks€of€fire€or€explosion,€or€potential€for€exposure€to€hazardousÐ  Ðconstituents€as€a€result€of€an€accident€or€failure€of€a€container€or€handling€system;€andÐ âò ÐÌà  àà ` àà ¸ à(G)€€other€situations€that€may€pose€threats€to€human€health€and€theÐ ž® Ðenvironment.Ð |Œ ÐÌà  à(b)€€An€owner€or€operator€may€determine,€based€on€information€developed€afterÐ 8!H Ðimplementation€of€the€remedy€has€begun€or€other€information,€that€compliance€with€requirements€ofÐ "& Ððð330.237(b)€of€this€title€are€not€being€achieved€through€the€remedy€selected.€€In€such€cases,€the€ownerÐ ô" Ðor€operator€shall,€with€approval€of€the€executive€director,€implement€other€methods€or€techniques€thatÐ Ò#â Ðcould€practicably€achieve€compliance€with€the€requirements€unless€the€owner€or€operator€makes€theÐ °$À  Ðdetermination€under€subsection€(c)€of€this€section€and€if€it€is€approved€by€the€executive€director.€Ð Ž%ž! ÐFailure€to€obtain€approval€from€the€executive€director€for€the€other€methods€and€techniques€does€notÐ l&|" Ðrelieve€the€owner€or€operator€of€the€burden€to€implement€an€acceptable€remedy.Ð J'Z# ÐÌà  à(c)€€If€the€owner€or€operator€determines€that€compliance€with€requirements€under€ðð330.237(b)Ð ) % Ðof€this€title€cannot€be€practically€achieved€with€any€currently€available€methods,€the€owner€or€operatorÐ ä)ô & Ðshall:Ð Â*Ò!' Ðâ âÐ  +°"( Ðà  àà ` à(1)€€present€to€the€executive€director€certification€by€a€qualified€groundwater€scientistÐ ð Ðthat€compliance€with€requirements€under€ðð330.237(b)€of€this€title€cannot€be€practically€achieved€withÐ Î Þ Ðany€currently€available€methods;Ð ¬ ¼ Ðâ âÌà  àà ` à(2)€€implement€alternate€measures,€with€the€approval€of€the€executive€director,€toÐ h x Ðcontrol€exposure€of€humans€or€the€environment€to€residual€contamination,€as€necessary€to€protectÐ F V Ðhuman€health€and€the€environment;Ð $4 ÐÌà  àà ` à(3)€€implement€alternate€measures,€with€the€approval€of€the€executive€director,€forÐ àð Ðcontrol€of€the€sources€of€contamination,€or€for€removal€or€decontamination€of€equipment,€units,Ð ¾Î  Ðdevices,€or€structures€that€are€technically€practicable€and€consistent€with€the€overall€objective€of€theÐ œ¬  Ðremedy;€andÐ zŠ  ÐÌà  àà ` à(4)€€place€a€copy€of€all€approved€alternate€measures€in€the€operating€record.Ð 6F  ÐÌà  à(d)€€All€solid€wastes€that€are€managed€in€accordance€with€a€remedy€required€under€ðð330.237€ofÐ ò  Ðthis€title,€or€an€interim€measure€required€under€subsection€(a)(3)€of€this€section,€shall€be€managed€in€aÐ Ðà  Ðmanner€that€is€protective€of€human€health€and€the€environment€and€that€complies€with€applicableÐ ®¾ ÐRCRA€requirements.Ð Œœ ÐÌà  à(e)€€Remedies€selected€under€ðð330.237€of€this€title€shall€be€considered€complete€when:Ð HX ÐÌà  àà ` à(1)€€the€owner€or€operator€complies€with€the€groundwater€protection€standardsÐ  Ðestablished€under€ðð330.235(h)€or€(i)€of€this€title€at€all€points€within€the€plume€of€contamination€that€liesÐ âò Ðwithin€or€beyond€the€groundwater€monitoring€system€established€under€ðð330.231(a)€of€this€titleÐ ÀÐ Ð(relating€to€Groundwater€Monitoring€Systems);€Ð ž® ÐÌà  àà ` à(2)€€compliance€with€the€groundwater€protection€standards€established€underÐ Z j Ððð330.235(h)€or€(i)€of€this€title€has€been€achieved€by€demonstrating€that€concentrations€of€assessmentÐ 8!H Ðconstituents€have€not€exceeded€the€groundwater€protection€standards€for€a€period€of€three€consecutiveÐ "& Ðyears,€using€the€statistical€procedures€and€performance€standards€in€ðð330.233(g)€and€(h)€of€this€titleÐ ô" Ð(relating€to€Groundwater€Sampling€and€Analysis€Requirements).€€The€executive€director€may€specifyÐ Ò#â Ðan€alternative€length€of€time€during€which€the€owner€or€operator€shall€demonstrate€that€concentrationsÐ °$À  Ðof€assessment€constituents€have€not€exceeded€the€groundwater€protection€standards.€€The€alternativeÐ Ž%ž! Ðlength€of€time€shall€be€based€on:Ð l&|" ÐÌà  àà ` àà ¸ à(A)€€extent€and€concentration€of€the€release;Ð ((8$ ÐÌà  àà ` àà ¸ à(B)€€behavior€characteristics€of€the€hazardous€constituents€in€the€groundwater;Ð ä)ô & ÐÌà  àà ` àà ¸ à(C)€€accuracy€of€monitoring€or€modeling€techniques,€including€any€seasonal,Ð  +°"( Ðmeteorological,€or€other€environmental€variabilities€that€may€affect€the€accuracy;€andÐ ~,Ž#) ÐÐ \-l$* Ðà  àà ` àà ¸ à(D)€€characteristics€of€the€groundwater;€andÐ ð ÐÌà  àà ` à(3)€€all€actions€required€to€complete€the€remedy€have€been€satisfied.Ð ¬ ¼ ÐÌà  à(f)€€Within€15€days€of€completion€of€the€remedy,€the€owner€or€operator€shall€submit€to€theÐ h x Ðexecutive€director€and€also€place€in€the€operating€record€a€certification€by€a€qualified€groundwaterÐ F V Ðscientist€that€the€remedy€has€been€completed€in€compliance€with€the€requirements€of€subsection€(e)€ofÐ $4 Ðthis€section.Ð  ÐÌà  à(g)€€Upon€submittal€of€satisfactory€certification€of€the€completion€of€the€corrective€actionÐ ¾Î  Ðremedy,€the€executive€director€may€release€the€owner€or€operator€from€the€requirements€for€financialÐ œ¬  Ðassurance€for€corrective€action€under€ðð330.284€of€this€title€(relating€to€Corrective€Action€forÐ zŠ  ÐLandfills).Ð Xh  ÐÌò òó óÔ#†<&õ%%1&õ@â#ÔAdopted€August€6,€2003à€ÂÂ0(#àEffective€September€1,€2003ˆÐ $  ÐÌò òðð330.239.€€Ground„Water€Monitoring€at€Type€IV€Landfills.ó óÐ Ðà  ÐÌà  à(a)€€The€requirements€in€this€section€apply€to€existing€and€future€Type€IV€sites,€as€defined€inÐ Œœ Ððð330.41(e)€of€this€title€(relating€to€Types€of€Municipal€Solid€Waste€Facilities),€except€as€provided€inÐ jz Ððð330.3(e)€of€this€title€(relating€to€Applicability)€and€in€subsection€(b)€of€this€section.Ð HX ÐÌà  à(b)€€At€the€discretion€of€the€executive€director,€the€owner€or€operator€of€a€Type€IV€site€may€beÐ  Ðrequired€to€install€ground„water€monitoring€systems€and€to€monitor€on€a€regular€basis€the€quality€ofÐ âò Ðground€water€at€the€point€of€compliance.Ð ÀÐ ÐÌà  àà ` à(1)€€The€factors€to€be€considered€by€the€executive€director€in€determining€the€need€forÐ |Œ Ðground„water€monitoring€shall€include:€relationship€of€the€site€to€drinking„water€intakes€(both€surfaceÐ Z j Ðand€subsurface);€hydrogeology€of€the€shallow€water„bearing€zones€in€the€site€area;€use€of€shallowÐ 8!H Ðground€water€in€the€site€area;€type€of€waste€being€or€to€be€taken;€types€of€liner;€likelihood€of€leakageÐ "& Ðof€contaminants€from€the€site;€and€protection€of€human€health€and€the€environment.Ð ô" ÐÌà  àà ` à(2)€€A€ground„water€monitoring€system€shall€be€installed€in€accordance€with€ðð330.231Ð °$À  Ðof€this€title€(relating€to€Ground„Water€Monitoring€Systems).Ð Ž%ž! ÐÌà  àà ` à(3)€€Ground„water€sampling€and€analysis€requirements€shall€be€in€accordance€withÐ J'Z# Ððð330.233(a)„(e)€of€this€title€(relating€to€Ground„Water€Sampling€and€Analysis€Requirements).Ð ((8$ ÐÌà  àà ` à(4)€€Each€monitoring€well€or€other€sampling€point€shall€be€sampled€annually,€or€onÐ ä)ô & Ðsome€other€schedule€but€not€less€frequently€than€annually€as€determined€by€the€executive€director,€forÐ Â*Ò!' Ðthe€following€constituents:€chloride,€iron€(dissolved),€manganese€(dissolved),€cadmium€(dissolved),Ð  +°"( Ðâ âzinc€(dissolved),€total€dissolved€solids,€specific€conductance€(field€and€laboratory€measurements),€pHÐ ~,Ž#) Ð(field€and€laboratory€measurements),€non„purgeable€organic€compounds,€(analysis€of€three€replicateÐ ð Ðsamples).Ð Î Þ Ðâ âÌà  àà ` à(5)€€Not€later€than€45€days€after€each€sampling€event,€the€owner€or€operator€shallÐ Š š Ðsubmit€to€the€executive€director€for€review€and€approval€a€report€containing€the€results€of€the€analyses.Ð h x ÐÌà  àà ` à(6)€€The€executive€director€may€require€additional€sampling,€analyses€of€additionalÐ $4 Ðconstituents,€installation€of€additional€monitoring€wells€or€other€sampling€points,€and/or€otherÐ  Ðhydrogeological€investigations€if€the€facility€appears€to€be€contaminating€the€shallow€water„bearingÐ àð Ðzone(s).Ð ¾Î  ÐÌà  àà ` à(7)€€If€the€facility€is€found€to€have€contaminated€or€be€contaminating€the€shallow€water„Ð zŠ  Ðbearing€zone(s),€the€executive€director€may€order€corrective€action€appropriate€to€protect€human€healthÐ Xh  Ðand€the€environment€up€to€and€including€that€in€ðððð330.236-330.238€of€this€title€(relating€to€Ground„Ð 6F  ÐWater€Monitoring€and€Corrective€Action).Ð $  ÐÌò òðð330.240.€€Ground„Water€Monitoring€at€Other€Types€of€Landfills€and€Facilities.ó óÐ Ðà  ÐÌà  àThe€executive€director€may€establish€ground„water€monitoring€requirements€for€landfills€andÐ Œœ Ðfacilities€other€than€Type€I€or€IV€where€site„specific€conditions€and€operations€have€the€potential€forÐ jz Ðground„water€contamination.Ð HX ÐÌò òðð330.241.€€Constituents€for€Detection€Monitoring.ó óÐ  ÐÌà  àTable€1€of€this€section€contains€47€volatile€organic€compounds€(VOCs)€for€which€requiredÐ ÀÐ Ðanalytical€procedures€provided€in€Environmental€Protection€Agency€Report€SW-846,€"Test€MethodsÐ ž® Ðfor€Evaluating€Solid€Waste,"€third€edition,€November€1986,€as€revised€December€1987,€includeÐ |Œ ÐMethod€8260,€and€15€metals€for€which€SW-846€provides€either€Method€6010€or€a€method€from€theÐ Z j Ð7000€series€or€methods.€€Common€names€of€the€VOCs€are€those€widely€used€in€governmentÐ 8!H Ðregulations,€scientific€publications,€and€commerce;€synonyms€exist€for€many€of€them.€€The€ChemicalÐ "& ÐAbstracts€Service€registry€number€(CAS€RN)€is€shown.€€Where€"Total"€is€entered,€all€species€in€theÐ ô" Ðground€water€that€contain€the€element€are€included.Ð Ò#â ÐÌà@ZZ&ìàTABLE€1.ˆÐ Ž%ž! Ðà  àà ` àà ¸ àCommon€Nameà À àà  àà p àà È àCAS€RNÐ l&|" Ðà  àà ` àà ¸ à¼ððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððððÐ ((8$ ÐÓ ÿÿP @°œXÓà P àInorganic€constituents:Ð ) % Ðà P à(1)€€Antimonyà @ à(Total)Ð ä)ô & Ðà P à(2)€€Arsenicà @ à(Total)Ð Â*Ò!' Ðà P à(3)€€Bariumà @ à(Total)Ð  +°"( Ðà P à(4)€€Berylliumà @ à(Total)Ð ~,Ž#) Ðà P à(5)€€Cadmiumà @ à(Total)Ð \-l$* Ðà P à(6)€€Chromiumà @ à(Total)Ð ð Ðà P à(7)€€Cobaltà @ à(Total)Ð Î Þ Ðà P à(8)€€Copperà @ à(Total)Ð ¬ ¼ Ðà P à(9)€€Leadà @ à(Total)Ð Š š Ðà P à(10)€Nickelà @ à(Total)Ð h x Ðà P à(11)€Seleniumà @ à(Total)Ð F V Ðà P à(12)€Silverà @ à(Total)Ð $4 Ðà P à(13)€Thalliumà @ à(Total)Ð  Ðà P à(14)€Vanadiumà @ à(Total)Ð àð Ðà P à(15)€Zincà @ à(Total)Ð ¾Î  Ðà P àOrganic€constituents:Ð œ¬  Ðà P à(16)€Acetoneà @ à67„64„1Ð zŠ  Ðà P à(17)€Acrylonitrileà @ à107„13„1Ð Xh  Ðà P à(18)€Benzeneà @ à71„43„2Ð 6F  Ðà P à(19)€Bromochloromethaneà @ à74„97„5Ð $  Ðà P à(20)€Bromodichloromethaneà @ à75„27„4Ð ò  Ðà P à(21)€Bromoform€(tribromomethane)à @ à75„25„2Ð Ðà  Ðà P à(22)€Carbon€disulfideà @ à75„15„0Ð ®¾ Ðà P à(23)€Carbon€tetrachlorideà @ à56„23„5Ð Œœ Ðà P à(24)€Chlorobenzeneà @ à108„90„7Ð jz Ðà P à(25)€Chloroethane€Ð HX Ðà P à€€€€€(ethyl€chloride)à @ à75„00„3Ð &6 Ðà P à(26)€Chloroform€Ð  Ðà P à€€€€€(trichloromethane)à @ à67„66„3Ð âò Ðà P à(27)€Dibromochloromethane€Ð ÀÐ Ðà P à€€€€€(chlorodibromomethane)à @ à124„48„1Ð ž® Ðà P à(28)€1,2„Dibromo„3„chloropropane€Ð |Œ Ðà P à€€€€€(DBCP)à @ à96„12„8Ð Z j Ðà P à(29)€1,2„Dibromoethane€(ethylene€Ð 8!H Ðà P à€€€€€dibromide,€EDB)à @ à106„93„4Ð "& Ðà P à(30)€o„Dichlorobenzene€Ð ô" Ðà P à€€€€€(1,2„dichlorobenzene)à @ à95„50„1Ð Ò#â Ðà P à(31)€p„Dichlorobenzene€Ð °$À  Ðà P à€€€€€(1,4„dichlorobenzene)à @ à106„46„7Ð Ž%ž! Ðà P à(32)€trans„1,4„Dichloro„2„buteneà @ à110„57„6Ð l&|" Ðà P à(33)€1,1„Dichloroethane€Ð J'Z# Ðà P à€€€€€(ethylidene€chloride)à @ à75„34„3Ð ((8$ Ðà P à(34)€1,2„Dichloroethane€Ð ) % Ðà P à€€€€€(ethylene€dichloride)à @ à107„06„2Ð ä)ô & Ðà P à(35)€1,1„Dichloroethylene€Ð Â*Ò!' Ðà P à€€€€€(1,1„dichloroethene,Ð  +°"( Ðà P à€€€€€€€vinylidene€chloride)à @ à75„35„4Ð ~,Ž#) Ðà P à(36)€cis„1,2„Dichloroethylene€Ð \-l$* Ðà P à€€€€€(cis„1,2„dichloroethene)à @ à156„59„2Ð ð Ðà P à(37)€trans„1,2„Dichloroethylene€Ð Î Þ Ðà P à€€€€€(trans„1,2„dichloroetheneà @ à156„60„5Ð ¬ ¼ Ðà P à(38)€1,2„Dichloropropane€Ð Š š Ðà P à€€€€€(Propylene€dichloride)à @ à78„87„5Ð h x Ðà P à(39)€cis„1,3„Dichloropropeneà @ à10061„01„5Ð F V Ðà P à(40)€trans„1,3„Dichloropropeneà @ à10061„02„6Ð $4 Ðà P à(41)€Ethylbenzeneà @ à100„41„4Ð  Ðà P à(42)€2„Hexanone€(methyl€Ð àð Ðà P à€€€€€butyl€ketone)à @ à591„78„6Ð ¾Î  Ðà P à(43)€Methyl€bromide€Ð œ¬  Ðà P à€€€€€(bromomethane)à @ à74„83„9Ð zŠ  Ðà P à(44)€Methyl€chloride€Ð Xh  Ðà P à€€€€€(chloromethane)à @ à74„87„3Ð 6F  Ðà P à(45)€Methylene€bromide€Ð $  Ðà P à€€€€€(dibromomethane)à @ à74„95„3Ð ò  Ðà P à(46)€Methylene€chloride€Ð Ðà  Ðà P à€€€€€(dichloromethane)à @ à75„09„2Ð ®¾ ÐÔ& ¼ Ôà P à(47)€Methyl€ethyl€ketone€Ð Œœ Ðà P à€€€€€(MEK,€2„butanone)à @ à78„93„3Ô'¼ŒV+ÔÐ jz Ðà P à(48)€Methyl€iodide€(iodomethane)à @ à74„88„4Ð HX Ðà P à(49)€4„Methyl„2„pentanone€Ð &6 Ðà P à€€€€€(methyl€isobutyl€ketone)à @ à108„10„1Ð  Ðà P à(50)€Styreneà @ à100„42„5Ð âò Ðà P à(51)€1,1,1,2„Tetrachloroethaneà @ à630„20„6Ð ÀÐ Ðà P à(52)€1,1,2,2„Tetrachloroethaneà @ à79„34„5Ð ž® Ðà P à(53)€Tetrachloroethylene€Ð |Œ Ðà P à€€€€€(tetrachloroethene,Ð Z j Ðà P à€€€€€perchloroethylene)à @ à127„18„4Ð 8!H Ðà P à(54)€Tolueneà @ à108„88„3Ð "& Ðà P à(55)€1,1,1„Trichloroethane€Ð ô" Ðà P à€€€€€(methychloroform)à @ à71„55„6Ð Ò#â Ðà P à(56)€1,1,2„Trichloroethaneà @ à79„00„5Ð °$À  Ðà P à(57)€Trichloroethylene€Ð Ž%ž! Ðà P à€€€€€(trichloroethene)à @ à79„01„6Ð l&|" Ðà P à(58)€Trichlorofluoromethane€Ð J'Z# Ðà P à€€€€€(CFC„11)à @ à75„69„4Ð ((8$ Ðà P à(59)€1,2,3„Trichloropropaneà @ à96„18„4Ð ) % Ðà P à(60)€Vinyl€acetateà @ à108„05„4Ð ä)ô & Ðà P à(61)€Vinyl€chlorideà @ à75„01„4Ð Â*Ò!' Ðà P à(62)€Xylenesà @ à1330„20„7€€€€Ð  +°"( ÐÓE1ÿÿ°` ¸ hÀpÈ xÐ (#€%ÿÿP ðEÓÌò òÐ \-l$* Ððð330.242.€€Monitor„Well€Construction€Specifications.ó óÐ ð ÐÌÔ‡1&õ%%<&õÔà  à(a)€€The€following€specifications€must€be€used€for€the€installation€of€groundwater€monitoringÐ ¬ ¼ Ðwells€at€municipal€solid€waste€landfills.€€Equivalent€alternatives€to€these€specifications€may€be€used€ifÐ Š š Ðprior€written€approval€is€obtained€in€advance€from€the€executive€director.Ð h x ÐÌà  àà ` à(1)€€Drilling.Ð $4 ÐÌà  àà ` àà ¸ à(A)€€Monitoring€wells€must€be€drilled€by€a€Texas„licensed€driller€who€isÐ àð Ðqualified€to€drill€and€install€monitoring€wells.€€The€installation€and€development€shall€be€supervised€byÐ ¾Î  Ða€licensed€professional€geoscientist€or€engineer€who€is€familiar€with€the€geology€of€the€area.Ð œ¬  ÐÌà  àà ` àà ¸ à(B)€€The€well€shall€be€drilled€by€a€method€that€will€allow€installation€of€theÐ Xh  Ðcasing,€screen,€etc.,€and€that€will€not€introduce€contaminants€into€the€borehole€or€casing.€€DrillingÐ 6F  Ðtechniques€used€for€boring€shall€take€into€account€the€materials€to€be€drilled,€depth€to€groundwater,Ð $  Ðtotal€depth€of€the€hole,€adequate€soil€sampling,€and€other€such€factors€that€affect€the€selection€of€theÐ ò  Ðdrilling€method.€€If€any€fluids€are€necessary€in€drilling€or€installation,€then€clean,€treated€city€waterÐ Ðà  Ðshall€be€used;€other€fluids€must€be€approved€in€writing€by€the€executive€director€before€use.€€If€cityÐ ®¾ Ðwater€is€used,€a€current€chemical€analysis€of€the€city€water€shall€be€provided€with€the€monitor„wellÐ Œœ Ðreport.Ð jz ÐÌà  àà ` àà ¸ à(C)€€The€diameter€of€the€boring€shall€be€at€least€four€inches€larger€than€theÐ &6 Ðdiameter€of€the€casing.€€When€the€boring€is€in€hard€rock,€a€smaller€annulus€may€be€approved€by€theÐ  Ðexecutive€director.Ð âò ÐÌà  àà ` àà ¸ à(D)€€During€drilling€of€the€monitoring€well,€a€log€of€the€boring€shall€be€madeÐ ž® Ðby€a€licensed€professional€geoscientist€or€engineer€who€is€familiar€with€the€geology€of€the€area.Ð |Œ ÐÌà  àà ` à(2)€€Casing,€screen,€filter€pack,€and€seals.Ð 8!H ÐÌà  àà ` àà ¸ à(A)€€The€well€casing€shall€be:€€two€to€four€inches€in€diameter;€National€ScienceÐ ô" ÐFoundation„certified€polyvinyl€chloride€(PVC)€Schedule€40€or€80€pipe,€flush„thread,€screw€joint€(noÐ Ò#â Ðglue€or€solvents);€polytetrafluorethylene€(PTFE,€such€as€Teflon)€tape€or€O„rings€in€the€joints;€no€collarÐ °$À  Ðcouplings.€€The€top€of€the€casing€shall€be€at€least€two€feet€above€ground€level.€€Where€high€levels€ofÐ Ž%ž! Ðvolatile€organic€compounds€or€corrosive€compounds€are€anticipated,€stainless€steel€or€PTFE€casing€andÐ l&|" Ðscreen€may€be€used,€subject€to€approval€by€the€executive€director.€€Four„inch€diameter€casing€isÐ J'Z# Ðrecommended€because€it€allows€larger€volume€samples€to€be€obtained€and€provides€easier€access€forÐ ((8$ Ðdevelopment,€pumps,€and€repairs.€€The€casing€shall€be€cleaned€and€packaged€at€the€place€ofÐ ) % Ðmanufacture;€the€packaging€shall€include€a€PVC€wrapping€on€each€section€of€casing€to€keep€it€fromÐ ä)ô & Ðbeing€contaminated€prior€to€installation.€€The€casing€shall€be€free€of€ink,€labels,€or€other€markings.€Ð Â*Ò!' ÐThe€casing€(and€screen)€shall€be€centered€in€the€hole€to€allow€installation€of€a€good€filter€pack€andÐ  +°"( Ðannular€seal,€using€appropriately€placed€centralizers.€€The€top€of€the€casing€shall€be€protected€by€aÐ ~,Ž#) Ðthreaded€or€slip„on€top€cap€or€by€a€sealing€cap€or€screw„plug€seal€inserted€into€the€top€of€the€casing.€Ð \-l$* ÐThe€cap€shall€be€vented€to€prevent€buildup€of€methane€or€other€gases€and€shall€be€designed€to€preventÐ ð Ðmoisture€from€entering€the€well.Ð Î Þ ÐÌà  àà ` àà ¸ à(B)€€The€screen€shall€be€compatible€with€the€casing€and€should€generally€be€ofÐ Š š Ðthe€same€material.€€The€screen€shall€not€involve€the€use€of€any€glues€or€solvents€for€construction.€€AÐ h x Ðwire„wound€screen€is€recommended€to€provide€maximum€inflow€area.€€Field„cut€slots€are€not€permittedÐ F V Ðfor€well€screen.€€Filter€cloth€shall€not€be€used.€€A€blank„pipe€sediment€trap,€typically€one€to€two€feet,€Ð $4 Ðshould€be€installed€below€the€screen.€€A€bottom€cap€is€typically€placed€on€the€bottom€of€the€sedimentÐ  Ðtrap.€€The€sediment€trap€shall€not€extend€through€the€lower€confining€layer€of€the€water„bearing€zoneÐ àð Ðbeing€tested.€€Screen€sterilization€methods€are€the€same€as€those€for€casing.€€Selection€of€the€size€of€theÐ ¾Î  Ðscreen€opening€should€be€done€by€a€person€experienced€with€such€work€and€shall€include€considerationÐ œ¬  Ðof€the€distribution€of€particle€sizes€both€in€the€water„bearing€zone€and€in€the€filter€pack€surrounding€theÐ zŠ  Ðscreen.€€The€screen€opening€shall€not€be€larger€than€the€smallest€fraction€of€the€filter€pack.Ð Xh  ÐÌà  àà ` àà ¸ à(C)€€The€filter€pack,€placed€between€the€screen€and€the€well€bore,€shall€consistÐ $  Ðof€pre„packaged,€inert,€clean€silica€sand€or€glass€beads;€it€shall€extend€from€one€to€four€feet€above€theÐ ò  Ðtop€of€the€screen.€€Open€stockpile€sources€of€sand€or€gravel€are€not€permitted.€€The€filter€pack€usuallyÐ Ðà  Ðhas€a€30%€finer€grain€size€that€is€about€four€to€ten€times€larger€than€the€30%€finer€grain€size€of€theÐ ®¾ Ðwater„bearing€zone;€the€filter€pack€should€have€a€uniformity€coefficient€less€than€2.5.€€The€filter€packÐ Œœ Ðshould€be€placed€with€a€tremie€pipe€to€ensure€that€the€material€completely€surrounds€the€screen€andÐ jz Ðcasing€without€bridging.€€The€tremie€pipe€shall€be€steam€cleaned€prior€to€the€first€well€and€before€eachÐ HX Ðsubsequent€well.Ð &6 ÐÌà  àà ` àà ¸ à(D)€€The€annular€seal€shall€be€placed€on€top€of€the€filter€pack€and€shall€be€atÐ âò Ðleast€two€feet€thick.€€It€should€be€placed€in€the€zone€of€saturation€to€maintain€hydration.€€The€sealÐ ÀÐ Ðshould€be€composed€of€coarse„grain€sodium€bentonite,€coarse„grit€sodium€bentonite,€or€bentoniteÐ ž® Ðgrout.€€Special€care€should€be€taken€to€ensure€that€fine€material€or€grout€does€not€plug€the€underlyingÐ |Œ Ðfilter€pack.€€Placement€of€a€few€inches€of€pre„packaged€clean€fine€sand€on€top€of€the€filter€pack€willÐ Z j Ðhelp€to€prevent€migration€of€the€annular€seal€material€into€the€filter€pack.€€The€seal€should€be€placed€onÐ 8!H Ðtop€of€the€filter€pack€with€a€steam„cleaned€tremie€pipe€to€ensure€good€distribution€and€should€beÐ "& Ðtamped€with€a€steam„cleaned€rod€to€determine€that€the€seal€is€thick€enough.€€The€bentonite€shall€beÐ ô" Ðhydrated€with€clean€water€prior€to€any€further€activities€on€the€well€and€left€to€stand€until€hydration€isÐ Ò#â Ðcomplete€(eight€to€12€hours,€depending€on€the€grain€size€of€the€bentonite).€€If€a€bentonite„groutÐ °$À  Ð(without€cement)€casing€seal€is€used€in€the€well€bore,€then€it€may€replace€the€annular€seal€described€inÐ Ž%ž! Ðthis€paragraph.Ð l&|" ÐÌà  àà ` àà ¸ à(E)€€A€casing€seal€shall€be€placed€on€top€of€the€annular€seal€to€prevent€fluidsÐ ((8$ Ðand€contaminants€from€entering€the€borehole€from€the€surface.€€The€casing€seal€shall€consist€of€aÐ ) % Ðcommercial€bentonite€grout€or€a€cement„bentonite€mixture.€€Drilling€spoil,€cuttings,€or€other€nativeÐ ä)ô & Ðmaterials€are€not€permitted€for€use€as€a€casing€seal.€€Quick„setting€cements€are€not€permitted€for€useÐ Â*Ò!' Ðbecause€contaminants€may€leach€from€them€into€the€groundwater.€€The€top€of€the€casing€seal€shall€beÐ  +°"( Ðbetween€five€and€two€feet€from€the€surface.Ð ~,Ž#) ÐÐ \-l$* Ðà  àà ` à(3)€€Concrete€pad.€€High„quality€structural„type€concrete€shall€be€placed€from€the€topÐ ð Ðof€the€casing€seal€(two€to€five€feet€below€the€surface)€continuously€to€the€top€of€the€ground€to€form€aÐ Î Þ Ðpad€at€the€surface.€€This€formed€surface€pad€shall€be€at€least€six€inches€thick€and€not€less€than€fourÐ ¬ ¼ Ð(preferably€six)€feet€square€or€five€(preferably€six)€feet€in€diameter.€€The€pad€shall€contain€sufficientÐ Š š Ðreinforcing€steel€to€ensure€its€structural€integrity€in€the€event€that€soil€support€is€lost.€€The€top€of€theÐ h x Ðpad€shall€slope€away€from€the€well€bore€to€the€edges€to€prevent€ponding€of€water€around€the€casing€orÐ F V Ðcollar.Ð $4 ÐÌà  àà ` à(4)€€Protective€collar.€€A€steel€protective€pipe€collar€shall€be€placed€around€the€casingÐ àð Ð"stickup"€to€protect€it€from€damage€and€unwanted€entry.€€The€collar€shall€be€set€at€least€one€foot€intoÐ ¾Î  Ðthe€surface€pad€during€its€construction€and€should€extend€at€least€three€inches€above€the€top€of€the€wellÐ œ¬  Ðcasing€(and€top€cap,€if€present).€€The€top€of€the€collar€shall€have€a€lockable€hinged€top€flap€or€cover.€Ð zŠ  ÐA€sturdy€lock€shall€be€installed,€maintained€in€working€order,€and€kept€locked€when€the€well€is€notÐ Xh  Ðbeing€bailed/purged€or€sampled.€€The€well€number€or€other€designation€shall€be€marked€permanentlyÐ 6F  Ðon€the€protective€steel€collar;€it€is€useful€to€mark€the€total€depth€of€the€well€and€its€elevation€on€theÐ $  Ðcollar.Ð ò  ÐÌà  àà ` à(5)€€Protective€barrier.€€Where€monitoring€wells€are€likely€to€be€damaged€by€movingÐ ®¾ Ðequipment€or€are€located€in€heavily€traveled€areas,€a€protective€barrier€shall€be€installed.€€A€typicalÐ Œœ Ðbarrier€is€three€or€four€six„€to€12„inch€diameter€pipes€set€in€concrete€just€off€the€protective€pad.€€TheÐ jz Ðpipes€can€be€joined€by€pipes€welded€between€them,€but€consideration€must€be€given€to€well€access€forÐ HX Ðsampling€and€other€activities.€€Separation€of€such€a€pipe€barrier€from€the€pad€means€that€the€barrier€canÐ &6 Ðbe€damaged€without€risk€to€the€pad€and€well.€€Other€types€of€barriers€may€be€approved€by€theÐ  Ðexecutive€director.Ð âò ÐÌà  à(b)€€Unusual€conditions.€€Where€monitoring€wells€are€installed€in€unusual€conditions,€allÐ ž® Ðaspects€of€the€installation€shall€be€approved€in€writing€in€advance€by€the€executive€director.€€SuchÐ |Œ Ðaspects€include,€for€example,€the€use€of€cellar„type€enclosures€for€the€top„well€equipment€or€multipleÐ Z j Ðcompletions€in€a€single€hole.Ð 8!H ÐÌà  à(c)€€Development.€€After€a€monitoring€well€is€installed,€it€shall€be€developed€to€removeÐ ô" Ðartifacts€of€drilling€(clay€films,€bentonite€pellets€in€the€casing,€etc.)€and€to€open€the€water„bearing€zoneÐ Ò#â Ðfor€maximum€flow€into€the€well.€€Development€should€continue€until€all€of€the€water€used€or€affectedÐ °$À  Ðduring€drilling€activities€has€been€removed€and€field€measurements€of€pH,€specific€conductance,€andÐ Ž%ž! Ðtemperature€have€stabilized.€€Failure€to€develop€a€well€properly€may€mean€that€it€is€not€properlyÐ l&|" Ðmonitoring€the€water„bearing€zone€or€may€not€yield€adequate€water€for€sampling€even€though€theÐ J'Z# Ðwater„bearing€zone€is€prolific.Ð ((8$ ÐÌà  à(d)€€Location€and€elevation.€€Upon€completion€of€a€monitoring€well,€the€location€of€the€wellÐ ä)ô & Ðand€all€appropriate€elevations€associated€with€the€top„well€equipment€shall€be€surveyed€by€a€registeredÐ Â*Ò!' Ðprofessional€surveyor.€€The€elevation€shall€be€surveyed€to€the€nearest€0.01€foot€above€mean€sea€levelÐ  +°"( Ð(with€year€of€the€sea„level€datum€shown).€€The€point€on€the€well€casing€for€which€the€elevation€wasÐ ~,Ž#) Ðdetermined€shall€be€permanently€marked€on€the€casing.€€The€location€shall€be€given€in€terms€of€theÐ \-l$* Ðlatitude€and€longitude€at€least€to€the€nearest€tenth€of€a€second€or€shall€be€accurately€located€with€respectÐ ð Ðto€the€landfill€grid€system€described€in€ðð330.55(a)(10)(F)€of€this€title€(relating€to€Site€DevelopmentÐ Î Þ ÐPlan).Ð ¬ ¼ ÐÌà  à(e)€€Reporting.€€Monitoring€well€installation€and€construction€details€must€be€submitted€onÐ h x Ðforms€available€from€the€commission€and€must€be€completed€and€submitted€within€30€days€of€wellÐ F V Ðcompletion.€€A€copy€of€the€detailed€geologic€log€of€the€boring,€any€particle€size€or€other€sample€dataÐ $4 Ðfrom€the€well,€and€a€site€map€drawn€to€scale€showing€the€location€of€all€monitoring€wells€must€beÐ  Ðsubmitted€to€the€executive€director€at€the€same€time.€€The€licensed€driller€should€be€familiar€with€theÐ àð Ðforms€required€by€other€agencies;€a€copy€of€those€forms€must€also€be€submitted€to€the€commission.Ð ¾Î  ÐÌà  à(f)€€Damaged€wells.€€Any€monitoring€well€that€is€damaged€to€the€extent€that€it€is€no€longerÐ zŠ  Ðsuitable€for€sampling€shall€be€reported€to€the€executive€director€who€may€make€a€determination€aboutÐ Xh  Ðwhether€to€repair€or€replace€the€well.Ð 6F  ÐÌà  à(g)€€Plugging€and€abandonment.€€Any€monitoring€well€that€is€no€longer€used€shall€be€properlyÐ ò  Ðabandoned€and€plugged€in€accordance€with€16€TAC€ðð76.702€(relating€to€Responsibilities€of€theÐ Ðà  ÐLicensee€and€Landowner€Well€Drilling,€Completion,€Capping,€and€Plugging)€and€ðð76.1004€(relating€toÐ ®¾ ÐTechnical€Requirements€Standards€for€Capping€and€Plugging€of€Wells€and€Plugging€Wells€thatÐ Œœ ÐPenetrate€Undesirable€Water€or€Constituent€Zones).€€No€abandonment€shall€take€place€without€priorÐ jz Ðauthorization€in€writing€by€the€executive€director.Ð HX ÐÌÔ#†<&õ%%1&õe2#ÔAdopted€August€6,€2003à€ÂÂ0(#àEffective€September€1,€2003