EXH0027017357

• From: Kmet. Peter | 1_," 1"7_0 / - Sent: Wednesday, June 27, 2001 4:01 PM • M. Green To: Fitzpatrick, Kevin Cc: Yee, Chung K. Subject: RE" Acceptable Fill Criteria Language for Draft 401 Certification DELIBERATIVE DOCUMENT CURRENTLY EXEMPT FROM PUBLIC DISCLOSURE If we are not going to restrict fill material to naturally occurring uncontaminated soils, I recommend you use the following language to address potential impacts on plants and animals. The intent of this language is to ensure the fill material used would be "clean enough" that itwouldnotbe expectedto causeadverseimpactson plantsandanimalsthatcome in contactwithit. Notethatthisdoes notaddresspotentialhumanhealthexposurepathwaysor protectionof aquatic organisms,whichwillneed to be addressedwithotherlanguage. There are severalelementsto thisrecommendation: First,isthe listof chemicalsof concern. I am recommendingwe usethe listinTable 749-3. While lengthy,thislistrepresentsthe morecommonlyoccurringcontaminantsthat have informationon potentialterrestrialecologicalimpacts. Onlythosesuspectedof beingpresentat the sitewouldhave to be testedbeyondthoseyouare alreadyspecifyingtheytest for. Second,I am recommendingwe requirethe fill materialto meetthe moststringentvalue inTable 749-3 unlessbioassaytestingis conductedthat demonstratesthe fillis nottoxicto plantsand animals. The table749-3 valuesare consideredscreeningvaluesfor ecologicallysensitivesites. Third,asa furthersafeguard,I am recommendingthatthe uppermost6 feet of fillplaced be required to be cleannaturalsoil. Thisisthe zonewhere mostsoilbiologicalactivityoccursandwillprovidea bufferzone thatpreventsmostplantandanimalcontactwithanydeepercontaminatedfill material. It shouldalsominimizethe potentialforworkercontactduringroutineconstructionand maintenance activitiesat the airport. Fourth,becausetherecanbe considerablevari_.bilityinsoilconcentrationsand it is notpossibleto testeverycubicinchof soil,I am recommendingthatthe statisticaltestmethodsspecifiedforsoilsin WAC 173-340-740be usedto analyzeany testdata anddemonstratecompliancewiththese requirements. Here ismysuggestedlanguage: The uppermost6 feet of fill materialshallconsistof cleannaturallyoccurringsoilwithnodetectable manmadeorganiccompoundsand nometalsabovenaturalbackgroundconcentrationsasdefinedin Ecologypublication#94-115 entitled"Natural BackgroundSoil Metals ConcentrationsinWashington State". All other fill material not consisting of such clean naturally occurring soil shall be subjectto the following requirements. All fill material nc.tfrom clean natural soil borrow sources shall be tested for at a minimum [insert your…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]