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v Winston H. Hickox Agency Secretary California Environmental Protection Agency 6 0 Department of Toxic Substances Control January 1, 2002 Edwin F. Lowry, Director 700 Heinz Avenue, Suite 200 Berkeley, California 94710-2721 TIP - 5 TANK INTEGRETY ASSESSMENTS (Available electronically at http://www.dtgg.ca.gov/??) To: Local Agencies and Other Interested Parties Gray Davis Governor The purpose of this letter is to provide information regarding the requirements for performing hazardous waste tank integrity assessments. The requirements for tanks are largely dependant upon the age of the system, the type of waste in the tank, and in some cases, the total amount of waste generated by the facility. This letter includes a short checklist/worksheet to assist you in determining the proper status of the tank or tank system. Where do I start? The first step in determining a tank or tank system's requirements is to determine when the tank was installed, what type of waste in held in the tank, the use of the tank (treatment vs. accumulation/storage) and the facility's accumulation status. There are seven basic groups, each of which has its assessment standards outlined in an appendix to this TIP: 1. Tiered Permitting system tanks (Conditional Exemption, Conditional Authorization or Permit -by -rule) 2. Existing tank, non-RCRA waste accumulation only 3. New tank, non-RCRA waste accumulation only 4. Existing tank, RCRA waste accumulation, RCRA exempt/RCRA conditionally exempt small quantity generator (CESQG)/RCRA small quantity generator (SQG) 5. New tank, RCRA waste accumulation, RCRA exempt/RCRA conditionally exempt small quantity generator (CESQG)/RCRA small quantity generator (SQG) 6. Existing tank, RCRA waste accumulation only 7. New tank, RCRA waste accumulation only In most cases, the installation of secondary containment that meets regulatory standards will eliminate the need for ongoing assessment of tank integrity. What is a Tiered Permitting system tank? A Tiered Permitting system tank is any tank that is used as an integral part of an onsite treatment system authorized under Permit -by -rule, conditional authorization, and/or conditional exemption. The unit specific page of the notification documents the number The energy challenge facing Califomia is real Every Californian needs to take immediate action to reduce energy consumption. For a list of simple ways you can reduce demand and cut your energy costs, see our Web -site at www.dtsc.ca.gov.