PERMFILE69668

• Permit No: M2003091
• IBM Index Class Name: Permit File
• Doc Date: 6/30/2004
• Doc Name: CDPS Industrial General Permit
• From: CDPHE
• To: LaFarge West Inc
• Media Type: D
• Archive: No

Rarisnole~- page 3.
V. TERMS AND CONDITIONS OF PERMIT
A. Process Water Dischar¢es
Numeric Limitations: Numeric limits will be applied for some of the industrial categories covered by this permit. These
limits are from the EPA Federal Guidelines far the applicable point source category, as follows:
a. Mineral mining and processing point source category - 40 CFR 436 - subpanB (crushed stone), C (construction sand
and gravel), R (phosphate rock) -and all other industrial facilities covered under SIC Code 14, except those
specifically listed in paragraph b below, and concrete and asphalt batch plants located at any facility otherwise
covered by this genera! permit:
Table [! 1-Effluent Limits
Parameter Limit Rationale
Flow, MGD Report a/ NA
TSS, mgQ 30/45 b/ State Effluent Regulations
pH, s.u. 6.5-9.0 c/ Water Quality Standards
Oil and Grease, mg/1 10 d/ State Effluent Regulations
Total Dissolved Solids, mg/1 Report d/f/ Salinity Regulations
Total Phosphorus (as P), mgA Report d/e/ Various Phosphorus Regulations
Mineral mining and processing point source category-40 CFR 936-subpartAL(graphite): The dischargeofprocesswastewaterfromgraphite~
mines is not covered by this permit. (See Section V.A.Z.d of the Rationale.)
b. Mineral mining and processingpairttsourcecategary-40 CFR 436-subpartD(industrialsand)(excepzfor
generated wastewater from facilities employing HF floatarion):
Table V-2 -Effluent Limits
Parameter Limit Rationale
Flow, MGD Report a/ NA
TSS, mg/! 25/45 b/ Best Practicable Technology
pH, s.u. 6.5-9.0 c/ Water Quality Standards
Oil and Grease, mg/l JO d/ State Effluent Regularions
Total Dissolved Solids, mg/1 Report tUf/ Salinity Regulations
Total Phosphorus (as P), mg/1 Report d/e/ Various Phosphorus Regulations
b/ 30-Day Average/7-Dq~Average rl See VA.1.c.
d Minimum-Maximum j/ See V.A.1.8.
No process water discharge will be covered under [his permit or authorized by certification for discharges with the mine
mining and processing point source category of 40 CFR 436 - subparts E (gypsum), F (asphal[ic mineral), G (asbestos a
wollasronite), J (barite), K {fluorspar), L (salines from brine lakes), M (borax), N (potash), O (sodium sulfate),
(bentonite), W (magnesite), X (diatomite), Y (jade), Z (novaculite), and AF (trtpoli).
1. Discussion al Limitations:
a. Exceptions to Federal Limits: The 40 CFR 436 includes some effluent limitations, which are nor as strict as, those li
here. For example, the phosphate rock TSS limit is less strict, andfor many of the subcategories, which state "no discht
ofprocess wastewater,"an exemption to that limit is provided during certain precipitation events and in conjunction i
other conditions. However, this permit does not include these related limits. This is a general permit, designed to coves
widest possible range ofjaciiities with similar wastewater characteristics. In effectively achieving this broad coverage,
permit must also be relatively simple. Therefore, some of the more individualistic or complex permit limitations are
included in this permit.
The Division does not believe that there are a sufficiently large number ojsuch facilities in Colorado to warrant inclu
the exemptions in this general permit. Ifa permittee wishes to take advantage ojthese exemptions, rhepermiaee must u
for an individual permit.