EXH1049037648

PCHBPollution Control Hearings Board of the State of Washington

d-=.-_vedfrom the litcnmre on manunaJs. No dcznonstrablc .objecdvm were to (t) asses the fox/city of the Z]ycol m/xtu_ .-=_:.._ na_ bccn propo-,.zl for propylme #ycoL The few t° aquafictest 9rpnisms u#"Ztraditional LC-S0and sublc_ka_' _udies that have b_n pet'formed on aquatic orNanisms in- testing methods; ('b) compare published toxicity conccmn- ,_,cam_ acute _ valuesarc L'encralJymuch I_'mterth_ dons of the primary inL,yedimts to the industrial mixtures; 1,000 m4VL.The LCS0v_lu(=for cthylmeItJyc,qransefrom and (c)compa_ _c toxiclolls of the mixtureto thosclove& l 0,000 m_/L to S7,CC0mg/L for fathcad minnow (/_pbn- found ia the strea.q_. In addhion, tissue samples were pre- les promelas), Daphnia mnL,na, and Cer/od4phn_ dub/o served for hJstolojicll exm_cion [L3].The inclusion of his. [2,7-g]. Propylene glycol .4,t_ are more smr_- Chronic- tological parmnc_m'sas part of the ssudy objectives rmmlted nffecu dam arc lacking, iu _onmui_ on ¢besublcthalsnd kcbal ¢ffc=s of such mix- Low-molecular-wcisht #ycols used in de_.c_s sn_ hilf_ mrm that wal be of value to environmental rcscarchcn. soluble in water, _cr'a//y degrade rapidly [8], and tha_orc have low potcud_ to bioaccumula_. Howo_, sumdard STUDYAREA , testsgcm:_Uy provide a more optimum ¢uv_mumt for dq- " .iradacion than normally found in namrc'[10L L0kkc [11] Sawm/H Crc_k is a sa:ond-order Maryland coastal-plain _ studied dispasionanddqmdat/onofeth3dmelt,3coloawu'- stresm with ),m(:Lwatenlocatedwithin the boundaries of iota soil typ_ at tempazau'eso_moaly m_mmta_ un- Balfimm_W._.k_mmnlatalmdona/AirportOBWI)(Fig. 1). .I' d_ fieldcondlt/o_ (6--I0"C). Ethylene f_ol had •vcrT low The _'pm't is locau_ on I,_9 ha O,I$8 acres) in Anne potc_ia/to adsorb to soil partir._ and th_fore is pm_ to Anmdd County, Maryhu_ u_r Baltimore.…
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