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.Y ~ ~ • • <br />I COLOR_1D0 DEP~12T~3=YT OF H.~~1LTH <br />\ kater Quality Control Division <br />Rationale - Page 3 <br />Permit No. CO-0032115 <br />The perci*_tee has had a violation of oil and grease litits at discha_*ge points <br />007 and 009 in ;fav, 1984. The source has been identified,.... as an algal <br />bloom. During, the process of sample analysis, chlorophyll is extracted. The <br />C ch'_orop::y11 in the sample is read as oil and grease. ;10 ot::er instances of <br />elevated oil and grease have been reported. <br />One pH violation has also been reported for discharge point 008 in }?a }', l°84. <br />This problem is the result o} algal blooms in the sedi:aent pond. The <br />permittee is in the process of testing cuitrine (a conger sulfate additive) to <br />determine if this will reduce t!te algae problem. <br />ypplicable Pules and Regulations: <br />001. 00'_ - Discharge points 001 and 002 have ccntit.uous flows o= <br />ground:cater. iiucaever, no water quality standards except _°or ~ri <br />exist ir. the-ecei:ink strew. Taus, 3dT limits are app'_ic::b.e as <br />described below. <br />QO? - 003 - Discharges of runoff fron sn r_'ace coal r_ining operations are <br />covered under federal 'i guide__nes. Tl:e onl;: eaceot~ons ace ::H <br />cahich has licit o' G.S - 9.0 oer _stream :rater euaLt•: stn:.ce_~s <br />(FiQS) and oil a-d grease ~~:hicn hss a limit of 10.0 rg/1, as <br />raqu_r2d under ~.`:e Stste .._ van Standards (S'S). :+a ter c~=.lity <br />based e_fluent Limitations are not applicable since t!:a ponds <br />discharge onl;: in response to stcr^ events. <br />Lrnder the federal SdT wi'_eiines, carious 1i~its are applicable sccor::ia~ to <br />precipitation cond_tions and at the option o' tea _ernittez. These lim_ts are <br />applicable to disci;aroes of com~ing'_ed sto ^ rucoff and mine water. <br />During periods of dry weather, '_imita[ions for pH, oil and grease, total iron <br />and total suspender solids are apnlicable to toe discharge. Du:iag periods of <br />precipitation up to the 10 tear-24 boor stor:~ evert, limits for n1', oil ~r,d <br />grease and settleable solids shall apple at tae option of rho per-it,.ee. <br />Finally, discharges durin3 precipitation events in e:~cess o: the i0 ~r-34 <br />hour event may meet limits for p3 ana oil and „- axe onl;. <br />EFFLGE,'T LI`!IT?.TIOP~S: <br />Table 1 on thr. folluwin; nn ;e sl~ocs tl:c eff'.uar.t Linitations app'ic;`~_,_ tc alt <br />dischar^e points at tais facility. T!iese limits -:r_ based en ta., provious <br />discussion. <br /> <br />