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�'acr �9ora� <br />Pcnni� No. �1':1-003197-6 <br />\foditica�inn I)atc: i�ia�' I. 2007 <br />If no efilucnt limi� ic requimd b} this suhsection (L3) and am of the lhree acuie <br />tozicity tes�s in subsection A do not result in I OU% survival in 100°.o elTlueni. then <br />thc Pcrmittcc shall complctc all applicablc roquircmcnts for characteri�ing thc acutc <br />toxicin� for the ncst pertnit application in subsection F per the requirements of <br />5�ns��c�o� r. <br />Thc e(flucnt limit for acutc tuxirity is no acutc toxicity dctcctcd in a tcst <br />cunccntration represcnting thc acutc critical cfllucnt conccntr•rlion (ACEC). <br />In thc cvcnt of failurc to pass Uic tcst dcscrihcd in suhscction C' of this scction for <br />crnnplianec �cith the e(llueni limit for acute tosicity, the Pennitter is considered to be in <br />compliancc �� ith all permit rcquircmcnts for aculc �� holc c(llucnt tosicit}� as lone as thc <br />rcyuirements in subscction D are bcing met to thc satisfaction of ihe Department. <br />I hc ACI-:C ntcans thc ma�imum conccntration ofcfllucnt during critical condition� <br />at the boundary of thr zonc of acutc critcria c�cccdancc assigncd pursuant to 1VAC <br />173-201 A-100. tiincc Ihere is no ione of acute criteria e�cecdance in Ihis permil. <br />thc ACGC cyuals 100°�6 efllucnt. <br />C. �lanitoring far Cmm�liancc \1'ith an F.flluent I.imit for Acutc T�sicin <br />�foni�oring to detcnninc compliancc with thc cillucnt limi� sh�ll bc wnduc�cd <br />quahcrly for Ihc rcmaindcr of the permit tcrm usine cach of thc spccics IistcJ in <br />sub�cction A on a rotating basis and perfomicd using at ,� minimum 100",'0 <br />eflluent. the AC[C (100°io tfllucnl). and a control. l�hc Pc�mill�e shall submit a <br />�� rittcn rcport of thc acutc to�icit�• compliance monitoring �o dtc Dcp�rtmcnt <br />���ithin si�ty (GO) Ja} s afler r.ich �ampline event. <br />Thc Pcrmittcc shall schedule the �ositit�' tests in the order listed in �he permi� unless' <br />thc i���„n�„��u �,�,ur�s a,� r«�„�,��� ��, �������,� �ranothcr �pccics rotation schcdulc. <br />ri,� ��«�m ,����-���:�i ��, i or;o �rn����u Snall hc reportcd fur all compliancc monitorine. <br />Cotnpliancc with ihc cf�Licnt limil fiir acutc tu�icit�� mcans no s�:itislically significant <br />ditlerence in suni�al bct��ccn �he control and the tesl conccntralion reprcscnting thc <br />ACLC. 1'hc Pcrmittec shall immcdialcl� implcnunl subscclion D ifan�• acutc <br />toxicity icst conducteJ f��r compliance monitoring Jetemiines a s�atisticall�� <br />significaiu diflcrcncc in survia;il behvccn ihc comriil nnd thc ACI:C using h� pothcsis <br />tcsting at dtc 0.05 Ic�cl of significancc (Appcndi� H. EPNb00/d-R9/0011. Ifihe <br />dillcrcncc in survi��al bctnccn thc cuntrol anJ �hc AC'GC is Icss Ihan 10",0. thc <br />h��pothcsis Icst shall bc conducred ai thc U.01 Icvcl of sigai�icancc. <br />D. Rcs �onsc �u Noncomnliancc \I'ith nn Ii171ucn1 I.imit for Acinc Tosicih <br />If dic Pcrmiucc viola�cs thc acutc �o�icih limit in suhsccliun 13, thc I'cnniucc sh�dl <br />hcgin additional compliancc ntonitoring �� ithin onc ��'cck frotn �hc �ime of rccci��ing Ihc <br />�l'Sl fl'SUIlS. �I�IlIS additiunal monitoring shall bc conduc�cd wcckly fiir four consccuti��c <br />���eeks using Ihe same iest and species as the failed compliancc Iesl. Por interminent <br />dischargcs, tcsting shall bc conductcd on Ihc nc�t four dischargc cvcn�s using �hc samc <br />test and species as the fai!ed compliance test. Testing shall detennine the I.Cso and <br />cfllucnl limit compliancc Thc dischargcr shall return �o thc ariginal monitoring <br />freyuency in subsection C aflcr completion of the additional compliance monitorine. <br />