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COLORADO DEPARTMENF OF PUBLlC HEALTH AND EHVIRONMEM: Water Quatlry Control Division
<br />Ranormle -Page 2. Permit No. COG-SaaNtO
<br />Thejederal e(jluent guidelines thatgovern discharges from sand and gravel miningjacilities (4D CFR 436) control mostsurjace runo,
<br />from mining facilities. However, there are some sources ojstormwater from these sites which are not addressed, such as roads an
<br />railroad lines, pond outslopes, inactive loadouts, sites used for storage and maintenance of material handling equipment, etc.
<br />For sand and grave! operations, other mining and quarrying of nonmetallic minerals exceptfuels. andjor asphalt and concrete bate
<br />plants located ae such facilities, this general permit will cover both theprocess water discharges and stormwater discharges. Proces
<br />water discharges are addressed under Pan /.B ojthe permit; stormwater discharges are addressed under Part I. C of the permit.
<br />This will eliminate the needjoreoverage under more than onepermitfor mostsuch facilities. However, as discussed in Section V.A.2.
<br />ojthe Rationale, some facilities may wish to apply for an individua(permi[ instead, in order to take advantage ojsomejederal effluer.
<br />guidelines not included here. Additionally, as discussed in Section IILB ojrhe Rationale, the Water Quality Control Division ojth
<br />Colorado Department ojPublic Health and Environment (the "Division') retains the authority to require anyfacility to be covered unde
<br />an individual permit.
<br />III. COVERAGE UNDER THlS PERMIT
<br />A. Industrial Categories
<br />The types ofjacilities covered by this permit include al! mining and quarrying ofnonmetallic minerals, except farels. This !s th
<br />description ofStandard Industrial Classification (SIC) Code 14. Also, stormwaterfrom asphaltand concrete batch p/ants locate
<br />at sand and gravef operations is included here, due to their sunilarfry to the covered mines in pollution potential, and thei
<br />function as an adjunct to the mine operations. (The definition ojasphalt and concrete batch plane can include the use c
<br />recycled asphalt or concrete.) The categories include:
<br />S!C Code Industry Tvne SIC Code /ndustry Twe
<br />141 Dimension stone 248 Nonmeta!!ie minerals services, except fuels
<br />241 Crushed and broken stone (overburden removal, strip mining, etc.)
<br />144 Sand and gravel 249 Miscellaneous nonmetallic minerals, except
<br />145 Clay; ceramic, and refractory minerals fuels (asbestos, gems, ftll dirt pits,
<br />147 Chemical and jertilrzer mineral mining graphite, gypsum, peat, pumice, talc, etc.)
<br />2951 Aspkale batch planes 3273 Concrete batch plants
<br />B. F.xem~hbns~rSmallMunici alitie
<br />The Intermodal Surface Transportation Efficiency Actoj1991 Section l068(c) added an exemption to the stotmwatertzgulation
<br />formunicipalities with less than IOO,000population. Tke term "municipality"includes cities, towns, counties, special districts o
<br />any entity created by or pursuant to State law.
<br />Stormwater discharges associated with industrial activity (except for airports, steam electric power plants, or uncontrolle,
<br />sanitary landfills), thatare owned or operated by a small municipality are notrequired to applyfor orobtain astormwaterperm+
<br />until March /0, 2003. This exemption is onlyjor discharges ojstormwater. (Note: This exemption does not apply to other
<br />privately owned industries within the same small municipality)
<br />IV, CERTIFlCATlON
<br />A. Permit Certi~eaHons
<br />This permit is made up ojseveral parts, some of which do not apply to all permiaees (i.e., while most facilities will regain
<br />coverage under the stormwatersection /.C, many will not require coverage under the process water section /.B). Therefore, [h
<br />individual certification prepared for each applicant will indicate whether that applicant must follow Part I.B ofthe permit. In a~
<br />cases (except as noted in Section III.C, above), Part I.C must befollowed. (In the absence ofsuch indication from the Division
<br />the permiuee will be responsible for determining and then romplying with the applicable sections in Part L) In addition, ai
<br />nermtaees will be required to comply with Part !, subparts A, D, E and F, and al! ofPart !I ojthe permit.
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