EXH1050037691

DA.wl_ J. FISH_R,'t M_v_ H. KNoTr,$ ST_V_I_ D. Tul_Y,t Bolct¢_ S. Tum_Y,_ L_c_ T. Yo_'xos_" and Om_ooRY P. ZJ_GZ._Rt _Universityof MarylandSystem, Wye Reseaxchand Education Center, Queenxtowa, Maryland 21655 _MarylandDepartmentoftheEnvironment,2500BroeningHighway,B_dtimore,Maryland21224 (Received 2August 1994;Accepted 20December 1994) Abstract-InOctober1990,theU.S.EnvironmentalProu_on Agencypromulgatedapplicationrequirementswithdeadlines for storm-waterdischJu'gersusocmted with industr_ _'tivity and certain municipaJsystems. Major _-port.t havea number of hydrocarbon-basedcontaminantsthat couldappearin norm-water runoff. In addition, ethylene, ditth.vlene,and propyiene glycol deicingand anti-icing mixturesareused duringfrtstzin$and near.frenzingweather. The obj_',aveof this studywas to chara_eriz, the pozentizlacuteimpacton aquaticlife from industr_ storm-wamtdisc.harg,sfrom an inm-natiomflairport.._ma- pits from win_r storm events causedacute toxicity.'to both the fatheadminnow (l_mephatcspromela$) and thedaphnid (Daph- ntamagna), with LCS0valutaforboth sptmit_as low-¢ 1.0 to 2.0%effluent. The toxicityof the Samplesw_ due to the various glycol-baseddeicer/and-iesrmixturesusedduringtheseevent=.Highoxygendemandsandelevatedtoudmtrogenlevelstre other potential problems during znti-ich_/dticing ac*Jvities.Samples from rain eventsduringthe nonwinter months at the airpon did not causeacute toxicity unl_ a._ociatedwith fuel tpilLs.As ar_zultof this study, a new dischargepermithas been issued for this airport,requiringthe impiemenmuon of plans for the collccuon and r_'yclingand/or disposalof the deicer/anti-leer mixtures. Keywords-Storm water Acute toxicity Deicing mixtures Freshwater Airport INTRODUCTION WashingtonInternationalAirport(BWI).Type I deicing The MarylandDepartmentoftheEnvironment(MDE) mixturesareunthickened,containaminimum of80°70glycols hasanaggressiveprogramforwholeeffluenttoxicity(WET) byweight,and areprimarilyethyleneglycolbased.Type II underitsNationalPollutantDischargeEliminationSystem anti-icingmixturescontainatleast50% glycolsbyweightand (NPDES) permitprogram.In1987,MDE begana biomon- arepropylcneglycolbased.The Type IImixturescontain itoringcampaignofallindustrialandmajormunicipaldis- thickeningagentsthatenablethesolutionstosticktothe ) chargers that has, to date, accounted for more than 95% of treated surfaces and therefore inhibit ice formation while the 'f the industrial dischargers. The MDE requires a toxicity re- aircraft is stationary. Both Type I and II mixtures contain ;: ductionevaluation(TREe foralldischargersthathavecon- otherpossibletoxicantsincludingtheanimalcarcinogen1,4- _; firmedacutetoxicity.Also,theMDE requiresbiomonitoring dioxane,whichoccursintraceamountsintechnical-grade forchronictoxicitywhereappropriate, ethyleneglycol. !') In October 1990, the U.S. Environmental Protection Some laboratory data exist on…

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Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
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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 [...]