HYDRO26483

• Permit No: C1982056
• IBM Index Class Name: Hydrology
• Doc Date: 1/18/1995
• Doc Name: FINAL PERMIT COLO WASTEWATER DISCHARGE PERMIT SYSTEM NUMBER CO-0042161 TWENTY MILE COAL CO FOIDEL CR
• From: CDOH
• To: CYPRUS AMAX MINERALS CO
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

COLORADO DEPARTMENT OF PUB. HEAL7N AND ENVIRONMENT, Water Qu. ~ Control Division
Rationale -Page 5, Permit No. CO-0042161
Table V-1 -Self-MonitotinR Resuks For Outjall 001
No:.of .Reported :.'.: '::.`:Prevlpus.:.::::=No:of.::.:.
•
'.12eporting Coitcentmtions . Permit: .:':lynltptiiin
Parameter Periods Ave/Miii/Mar. Liritifattan .-: F.rt:arsiotis
Flow, MGD
30day average 4 0.200/0.042/0.2978 nont -
daily maximum 4 0.591/0.187/0.847 wnc -
1SS, mg/f
30dav average 4 14/7.3/26 35 0
daily maximum 4 20/10/30 70 0
OiI & Grease, mg/l 4 NV/NV/NV !0 0
pH, s. u. 4 -/7.0/9. I 6.5-9.0 1
Ammonia, Total, mg/t as N 4 0.57/0.07/1.51 none -
Total DissolNad Solids, mg/[ 4 4644/3214/6652 • •
Whole E_Qluem Toriciry, 4 •- «r ««
Acute
Whole Ejfluem Toxitiry, 2 -/pass/pass none -
Chronic
Iron (7RJ, mg/f 4 1.28/0.211/2.58 0.5 3
Aluminum (dissolved), mg1Q 4 0.26/0.1310.39 none -
7R meant the mtd neovenable fraecan, as defined in the Boric Smrdardt and Mnhadobeier Pot SuAaee Wafer (3.t.0J.
• :ee recdan Yt.A.3.e/
• •• tee recdon Y.B.
Table V-2 - Seij-MonuosinR Resttlts For Owjall 002

.:...:-:::'::'; ::.;.:";'; :,':::::: ;.

; :: ;: No::`.of
:.:.

..:.: Reportcd ::<-'::

::::'Pir!vioicc:;;
..
':':: ; No:`¢.i :::
::.::..: :.::.:..:...:::..:.:.:. .
. Repoitin .; .. :,Coiiantmtid{u::'' ;`'::rPeirtil;:?' :'`' n:::

Parameter :.::'::::::,•:::::;;:;>;:;;
:;:' ::'Periods.:: .
:..': itv¢/Miti/Mar:.;.;:::: .;..:
:;:;r:.':Grnil6lion..'
:"Srcursions::
E-QTuent Flow, MGD
30-day average 2 0.0!7/0.0017/0.033 0.075 1
daily maximum 2 0.05/0.011/0.0899 none -
/nfluenf Flow, MGD
30day averagt 4 0.023/0.0074/0.062 none -
daily maximum 4 0.05/0.011/0.142 none -
Ejfluem BODs, mg/[
30-day average 2 9/3/15 30 0
daily maximum 2 13/3/23 45 0
Influent BODs, mg/P
30day average 1 144/84/191 note -
daily maximum 2 209/104/294 none -
Efjiuem TSS, mglf 1 36/36/36 75 0
Fecal Colijorm, No./100 mf 2 60/3.3/1/6 6000 0
BODE, pereeru removal 2 94.1/92.2/96 85 0
(minimum)
• 2. Srnre Samnlinp.• There are no state sampling results available for this facility.
3. One Time E/lluent Screenine: The permittee performed a comprehensive ejflrtem analysis for the permit renewal.
The analysis included physical & biological, inorganic, metals and organic pollutants. None of the results for
parameters not already limited in the permit indicated reason for conttrn.