Laserfiche WebLink
COLORADO DEPARTMENT OF PUBLICHEALTH AND ENVIRONMENT, Rater Quality Control Division <br />Rationale, Page 1, COG-0500000 Sand and Gravel General Permit <br />RATIONALE <br />FIFTH RENEWAL <br />CDPS GENERAL PERMIT NO. COG-0500000- SAND AND GRA VEL PRODUCTION OPERA77ONS <br />(AND OTHER NONMETALLIC MINERALS EXCEPT FUEL) <br />ANNUAL FEE $270, CATEGORY 07 SUBCATEGORY IA (EFFECTIVE JULY 1, 2007) <br />INTRODUCTION <br />This is the fifth renewal of the general permit for sand and gravel (and other nonmetallic minerals) discharges (COG-0500000) to <br />surface waters. This permit is for the regulation of stormwater runoff and process water discharges. Changes have been made to <br />incorporate additional categories of mining facilities under this general permit. <br />II. GENERAL PERMIT SCOPE <br />A. Applicability <br />This general permit authorizes Stormwater and Process water discharges for the following types of facilities: <br />Mining and quarrying of nonmetallic minerals, except fuels; Standard Industrial Classification (SIC) Code 14. <br />Asphalt (SIC 2951) and concrete batch plants (SIC 3273) and recycling activities located at sand and gravel operations (Batch <br />plants can include the use of recycled asphalt or concrete) <br />This generalpermit does not cover stormwater only discharges, which are covered under stormwater permit COR-340000. <br />Types of Nonmetallic Mineral Mining and Processing Facilities - This general permit (COG-0500000) authorizes the discharge of <br />wastewater and stormwater from the following categories of nonmetallic mineral mining and processing, as defined in 40 CPR Part <br />436: <br />Crushed Stone (Subpart B) means process wastewater generated during the mining or quarrying and processing of crushed and broken <br />stone and rip rap. This includes all types of rock and stone, exce t rock and stone that is crushed or broken prior to the extraction of <br />mineral, which is covered elsewhere. 77ie processing of calcite, however, in conjunction with the processing of crushed and broken <br />limestone or dolomite is included. <br />_Construction Sand and Gravel (Subpart C) - means process wastewater generated during the mining and processing of sand and gravel <br />for construction or fill uses. <br />Phosphate Rock (Subpart R)-means process wastewater generated by the mining or quarrying of phosphate bearing rock, ore, or earth, <br />for the phosphate content. <br />Industrial Sand (Subpart D)-means process wastewater generated during the mining and processing of sand and gravel for uses other <br />than construction and fill. These uses include, but are not limited to, glassmaking, molding, abrasives, filtration, refractories, and <br />refractory bonding. <br />Graphite (Subpart AL)-means process wastewater generated during the mining and processing of naturally occurring graphite. <br />Batch Plants (Concrete or Hot Asphalt)-means process wastewater generated during the mixing process. This also includes the <br />associated truck and drum wash area for concrete facilities, and the wet scrubber discharge from hot asphalt plants. <br />All references to sand and gravel will include the other non-metallic minerals (except fuels), unless specifically exempted. This general <br />permit will cover both the process water discharges and stormwater discharges for sand and gravel operations including asphalt and <br />concrete batch plants and recycling activities located at such facilities. Process water discharges are addressed under Part LB of the <br />permit; stormwater discharges are addressed under Part L C of the permit. <br />Due to the potential toxicity and wide variety of pollutants, the minimal operations in Colorado, and some categories with provisions <br />difficult to incorporate into a general permit, Mineral mining and processing point source category - 40 CFR 436 - subparts E <br />(gypsum), F (asphaltic mineral), G (asbestos and wollastonite), J (barite), K (fluorspar), L (salines from brine lakes), M (borax), N <br />(potash), O (sodium sulfate), S (Frasch Suffer), V (bentonite), W (magnesite), X (diatomite), Y (jade), Z (novaculite), and AF (tripoli j, <br />will not be covered under this general permit.