HYDRO31380

• Permit No: M1974004
• IBM Index Class Name: Hydrology
• Doc Date: 10/31/1992
• Doc Name: CERTIFICATION CDPS GENERAL PERMIT STORMWATER DISCHARGES ASSOCIATED WITH SAND AND GRAVEL
• Media Type: D
• Archive: No

r~
U
PARTI
Page 7
Permit No. COG-500000
B. EFFLUENT LIMITATIONS AND CONDITIONS -PROCESS WATER DISCHARGE
Effluent Parameter Measurement Freauencv d/ g/ Samnlee Tvce h/
Flow, MGD Weeldy Instantaneous
Oil and Grease, mg/1 i/ Weekly Visurl
pH, s.u. Monthly Grab
Total Suspended Solids, mg/I Monthly Grab
Total Dissolved Solids, mg/1 a/j/ Quarterly Grab
Total Phosphorus (as P) mg/1 f/ Quarterly Grab
Self-monimring samples taken in compliance with the monitoring requirements specified above shall be taken
at the point of discharge prior to entering waters of the State.
b. Mineral mining and processing point source category - 40 CFR 436 - subparts E (gypsum), F (asphaltic
mineral), G (asbestos and wollastonite),1 (barite), K (fluorspar), L (salines from brine lakes), M (borax), N
(potash), O (sodium sulfate), V (bentonite), W (magnesite), X (diatomite), Y (jade), Z (noru;ulite), AF
(tripoli), and asphalt batch plants located at any facility otherwise covered by this general permit:
No monitoring is required (unless specified by the Division). An amual report m the Division on whether or
not a dischuge of process water has taken place at the facility is required (see Part I.D.3.b of the permit).
4. Flow Measurirtu Device
If not already a part of the permitted facility, within ninety (90) days after the effective date of the certification, a
flow measuring device shall be installed to give representative values of effluent quantities at the respective discharge
points. A flow measuring device will be applicable at all designated discharge points of process water. The Flow
may also be determined by using the pump capacity multiplied by the length of time the pump is operated. provided
that the accuracy requirement (see below) is met.
When the facility is not operating, and no discharge is occurting (e.g., if it is shut down for the winter), a Flow
measuring device is not required to be on site.
At the request of the Water Quality Control Division, or the Environmental Protection Agency, the: permittee shall
show proof of the accuracy of any flow-measuring device used in obtaining data submitted in the monitoring report.
The Flow-measuring device must indicate values within tau (10) percent of the actual flow being discharged.
C. EFFLUENT LIMITATIONS AND CONDITIONS - STORMWATER DISCHARGE
('this section (I.C) applies to all facilities with a discharge of stormwater.)
General Limitatior-S
a. Stormweter discharges from the industrial activity shall not cause or threaten to cause pollu;ioo, contamination
or degradation of any State waters.
b. There shall be no discharge of smitary waste waters from toilets or related facilities.
c. No chemicals are to be added to the discharge unless permission for the use of a specific chemical is granted
by the permit issuing authority. In granting the use of such chemicals, additioml limitations and monitoring
requirements may be imposed.
d. Bulls storage structures for petroleum products and other chemicals shall have adequate protection so as to
prevent soy reasonable loss of the material from entering discharged waters or waters of the State.