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Hazardous Waste Tank System Requirements for LQGs and Onsite Treatment Facilities —Page 6 of 14 E. Written Assessments for Tank Systems and Components 1. New Aboveground Tanks Holding Non-RCRA Hazardous Waste or RCRA-Exempt Waste, or Tiered Permit Tank Systems — For the following types of tank systems, a written assessment meeting the requirements of 22 CCR §66265.192(k) must be obtained prior to placing a new tank system or component in service: [22CCR§66265.192(h)(1)1: ➢ Systems containing non-RCRA hazardous wastes generated onsite; [22CCR§66265.192(h)(2)(A)] ➢ Onsite treatment unit tank systems authorized under the following tiers: [22CCR§66265.192(h)(2)(A)] • Conditional Exemption(CE) if the facility is a LQG; • Conditional Authorization(CA); • Permit-by-Rule (PBR). ➢ Systems containing RCRA hazardous wastes generated onsite if 40 CFR §265.1 exempts the owner/operator from the requirements of 40 CFR Part 265. [22CCR§66265.192(h)(2)(B)(2)] An independent, qualified California-registered professional engineer (PE)7 must review the assessment and attest that the tank system has sufficient structural integrity and is acceptable for the transferring, storing and treating of hazardous waste. [22CCR§66265.192(h)(1)] The assessment must include the following information: [22CCR§66265.192(k)] ❑ Hazardous characteristics of the waste(s) that have been or will be handled; [22CCR§66265.192(k)(8)] ❑ Tank configuration (i.e., horizontal or vertical), material of construction, and gross capacity in gallons; [22CCR§66265.192(k)(1)] ❑ All of the following information: [22CCR§66265.192(k)(2)] ❑ Material of construction; ❑ Material thickness and the method used to determine the thickness; ❑ Description of tank system piping (i.e., material, diameter); ❑ Description of any internal and external pumps; and ❑ Sketch or drawing of tank including dimensions. ❑ Design standard(s), if available, according to which the tank and ancillary equipment were or will be constructed, including design considerations (i.e., calculations) to ensure that: [22CCR§66265.192(k)(2)] ❑ Tank foundations will maintain the load of a full tank; ❑ Tank systems will be anchored to prevent flotation or dislodgment where the tank system is placed in a saturated zone, or is located within a seismic fault zone; ❑ Tank systems will withstand the effects of frost heave. ❑ If the tank was previously used, the age of the tank system if available (otherwise, an estimate of the age); [22CCR§66265.192(k)(3)] ❑ Description and evaluation of any leak detection equipment; [22CCR§66265.192(k)(4)] ❑ Description and evaluation of any corrosion protection equipment, devices, or materials; [22CCR §66265.192(k)(5)] ❑ Description and evaluation of spill prevention and overfill equipment; [22CCR§66265.192(k)(6)] ❑ Description and evaluation of secondary containment for the tank system and ancillary equipment demonstrating that it meets the requirements of 22 CCR §§66265.1920)(1) through 0)(3) and §66265.193(f); [22CCR§66265.192(k)(7)] 7 DTSC's interpretation is that a qualified PE is one whose license allows that individual to engage in the work of assessing whether or not a tank system meets the operating requirements specified in the applicable regulations. Further, §415 of Title 16, CCR requires that a PE practice and perform engineering work only in the field or fields in which he/she is by education and/or experience fully competent and proficient. UN-047-6/14 www.unidoes.org Rev.01/07/08