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STATE OF CALIFORNIA-Environmental Protectilency PETE WILSON Governor CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION 3443 Routier Road,Suite A — Sacramento,CA 95827-3098 --- PHONE:(916)255-3000 FAX:(916)255-3015ImlyX - & �evpmM� 14 June 1995 JUN 16 1995 CERTIFIED MAIL No. Z 175 115 504 Joel Sanchez ENVIRONMENTAL HEALTH US Intec PERMIT/SERVICES 3301 North Navone Road Stockton, CA 95204 NOTICE TO COMPLY WITH THE STATE OF CALIFORNM GENERAL PERMIT FOR STORM WATER DISCHARGESASSOCIATED WITH INDUSTRIAL ACTIVITIES(GENERAL PERM77) Site:3301 North Navone Road, Stockton, San Joaquin County, California 95204 In March 1995, you contacted Gwenda Copeland of our office regarding information for the above referenced General Permit. You discussed the need for U.S. Intec to be covered by the permit, and she subsequently mailed you a copy of the permit. Based on this conversation, it is the staffs understanding that you are conducting industrial activities at your site that may be predominantly classified as the manufacturing of roofing cements and coatings. If this describes your industrial activities, then your facility is required by federal regulations to be covered under the General Permit, and failure to obtain coverage under the permit would violate the federal Clean Water Act (CWA). The NPDES storm water permit requirements are mandated in the 1972 CWA Amendments, which prohibit the discharge of any pollutants from a point source into waters of the U.S., unless it is permitted under the NPDES program. Storm water discharges that occur through discreet conveyance systems are considered point sources subject to NPDES requirements. The 1987 Amendments to the CWA mandated the U.S. Environmental Protection Agency(USEPA)to publish regulations establishing permit requirements for storm water discharges associated with industrial activities, and large and medium municipal storm sewer systems. On November 16, 1990, USEPA published these regulations which were codified in 40 CFR, Parts 122, 123 and 124. To implement these Federal Regulations, the State Board adopted a statewide general NPDES pennit for storm water discharges associated with industrial activities (General Permit) on 19 November 1991, and amended it on 17 September 1992. If an industry determines that it conducts an activity that is defined in 40 CFR, Part 122.26(b)(14)(i-xi, excluding x), it may seek coverage under the General Permit, or apply for an individual storm water permit for the appropriate Regional Water Quality Control Board. At this time, we are encouraging industries to seek coverage under the General Permit. Attached is a copy of the General Permit for your review and use. If your industrial activity is described as the manufacturing of roofing cements and coatings then your Standard Industrial Classification(SIC) code is 2952. This type of facility requires coverage under an NPDES storm water permit, however, you must determine your facility's SIC code. If this description does not describe your industrial activity, you may determine your SIC code by referring to the 1987 edition of Standard Industrial Classification Manual at your local library for additional classifications. You may then refer to Attachment 1 of the enclosed General Permit package to see if your SIC code must be covered under an NPDES storm water permit.