HYDRO25332

• Permit No: M1980244
• IBM Index Class Name: Hydrology
• Doc Date: 2/1/2003
• Doc Name: NPDES Permits
• From: CDOH & E
• To: DMG
• Media Type: D
• Archive: No

A: TERMS AND CONDITIONS (continued)
Limits for Outfa11005B -Limits for Annual Precipitation Exemption from
' . `•1Vn r)icrharan" F rem ihn VT F to D rnnno l:ulrh a rnrt oe d r At S
-- ~~ Partt
.' 1'agc Ko. 5
Pcmtit Na: C'O-f101}WK
f
n
'
r
' ' ' ~schar a Limtfahons ~~
. Efflue
Parame
e
4 -Da Avery a Datl ax.
.Flow MGD Re ort Re ort
TSS m !I 70 30
Oil and Grease m r~l ~1V !0

Ammonia. Total I as N
Re ort ___
Re n
Co er Dissolved = 150 300

Meru ' T tat i
1 _
s ^
Cyanide 14'eak Acid Diss fable /1 Re ort 20*

Aluminum Dissolved
Re ort __
e o
lead Dissohed t/1 300 1600 `
Cadmium Dissohled~li~/1~~ SO
_______ (100 ______.___-:
t Man=anesc. Dissolved, util ~ _
Report ~t
~ R~ep~urt
l_
line. Dissolved. utJl ! 750
. I i.S00
nF1 su (minimum-maximum) NA 6.0-9.0
tit' _ !Q<mc Visibly In the event an oil ehstn or tloaeng oil a obseneJ. a grab sample shall be calleeted, mulyied. reported, a,ui etalumsd rrtau.~c• ~++ me I v
mg%I daily matimum value- `i1A = M1m Applicable. Thero is no mass limit ncszsvey Gx th+s discharge as the luw now m AaWua Gulch shore the diuhurec is
zero and the hmitabon of the ma.<s of the {Kdtulant in the discharge is ne+t necessary to pm0.tt [hu numeric sla+xiards m An:gim Gulch. • "n+c standard 'i+r the
n:cetvmg stream is hassd upon "lice" cyanide enneentrabons. Hnwrstr, there i. no analytical pnxedure for mcasvnng the rnnerntretion of fat cyande m a
complex unluent. 'Ihcreforc, AS'I'~I 1Anurican Society for TcsUng and Materrals).analytical procedure t}2373-00, wdl h uw•d to mresu:c weak ari~
disstxiabk cyanide in the et7lurnt. 'T'his analytical pr«edure will detect rim cyanide plus thr?w~ torm> or comptes eyaniJe that aze most readily cnns<n~d t.+
Cat c}snide. 1'tu: calculated etttueat limitation of ?µg1( is less titan the C'Cs@V's demonstrated ck:attion limit w!?0 µg11, 1'haeCore, a limiwwon frt wxa1. acid
disse+ciable cyanide wiil bu specilied. and will be Set equal m the detectkm limit. Pros ided weak acid disu+ciablc cianide concentralinns ar Icss than the
methyl denection limit of 30 µe.4, it will M+:tciumed that the i µg(t rice cyanida standard is tieing adrytwtch preNCCteJ.
2. IIect ~;inmgement Pr~eticec
the pennttee shall take all reasonable precautions to prevent any point source discharge into surface waters al the State
except as authorized through the temts and conditions that have been assigned tv specific discharge points that hate bctn
identified in the permit. Any cyanide contaminated waters that must be removed froth the leads facility liner leak detection
collection points. must he disposed of in n manner that will avoid any possible entry into surface waters, either directly, or
through a hydraulic connection to groundwater. The pennittee shall ensure drat the excavation, movement and placement of
arty materials that niigltt be contaminated with cyanide or other environnteittal pollutants is carried art in a titunoer which will
at'oid any discharge of pollutant's to surface waters of the State.
3.
The pennittee shalt achieve compliance with the final effluent limitations of Part [.A.1. for potcntiatly dissolved cadmium and
copper metals effeciive Febntary 1, 2006, in accordance with a schedule oC compliance approved by the Division. Phis
schedule of compliance applies to otttfall 001 A.
The pennittee shall submit to the Division by February 1, 2004, an implementation plan for achieving compliance fur the
aforementioned studies. As appropriate, the plan shall include operational changes, modification of the existing treaumnt
system, pretreaanent, and'or crntstrucuon of a flew [rcatinent system. A schedule of dates to accomplish various tasks related w
the plan should also be included.
Upon approval of the implementation plan(s) b}• the Division, all temts and eonditiotu of the implententationptan(s), including
but not hnvted to the compliance schedule, shall automatically become conditions of this petntit.
No later than 14 calendar days Collow'ing each date identified in the above schedule of compliance, the permitter shall submit
either a report of prograss or, in the case of specific actions being required by identified dates, a written notice of compliance or
noncompliance, any remedial actions taken, and the probability of meeting the next scheduled requirement.
The petmittee may petition to reopen the permit in response to any of the studies or reports required in the pemmit, or as oilier
information becomes available concerning the nature of the discharee and'or regulated contaminmtts, and'vr chan~ v> in
analytical methods (and guidance) used in detenninin+~ compliance"
The pemtittee will monitor for total mercury using the approved EPA methodolacy Method 1631 far a period lung coon ~h to
gather fvur samples. tf the concentrations are below detection or below the water quality stmtdard, monitorin+, Wray cease. If
howeycr, reportable concentrations aie present, monitoring wilt continue.