Section 30.343 - On-site Accumulation by Large Quantity Generators in Tanks(1) Throughout the period of accumulation, the generator shall comply with the standards for storage and treatment in tanks set forth in the following regulations subject to the exceptions, additions or modifications, if any, as noted: (a)310 CMR 30.691: Applicability.(b)310 CMR 30.692(1) through (4): Assessment of Existing Tank System's Integrity;(c)310 CMR 30.693: Design and Installation of New Tank Systems or Components.1.310 CMR 30.693(1) (first sentence) is replaced with the following: Generators with new tank systems or components shall obtain a written assessment, reviewed and certified by an independent, qualified, registered professional engineer, in accordance with 310 CMR 30.009, attesting that the tank system has sufficient structural integrity and is acceptable for the storing and treating of hazardous waste. The generator shall keep such assessment on file at the site of generation until final closure pursuant to 310 CMR 30.343(1)(i).(d)310 CMR 30.694: Containment and Detection of Releases.1. Notwithstanding the requirements of 310 CMR 30.694(1) and 310 CMR 30.692(5), a generator shall provide secondary containment that meets the requirements of 310 CMR 30.694 for all new and existing tank systems except as provided in 310 CMR 30.694(6).2. A Large Quantity Generator shall comply with the following in lieu of 30.694(5): a. All aboveground tanks shall have a containment system which is free of cracks and gaps and is sufficiently impervious to contain leaks, spills, and accumulated precipitation until the collected material is detected and removed. i. All indoor above ground tank systems shall have the capacity to contain 100% of the volume of the largest above ground tank; ii. All outdoor aboveground tanks systems shall have the capacity to contain either 10% of the total possible contained volume of the aboveground tanks, or 110% of the volume of the largest aboveground tank, whichever is greater. b. A generator shall remove all accumulated spillage and/or precipitation from the containment area within 24 hours or in as timely a manner as possible. (e) 310 CMR 30.695: General Operating Requirements. (f) 310 CMR 30.696: Inspections. 1. In addition, a generator shall also record every inspection in an inspection log or summary. 2. A generator shall keep the records of each inspection at the site of generation for at least three years from the date of inspection or until final closure pursuant to 310 CMR 30.343(1)(i), whichever period is longer. These records shall be furnished to the Department upon request. 3. At a minimum, these records shall include the date and time of the inspection, the name of the inspector, a notation of the observations made, and the date and nature of any repairs or other remedial actions. 4. All aboveground tanks shall be placed so that all the surface beneath each such tank can be inspected for spills and structural integrity. (g)310 CMR 30.697: Response to Leaks or Spills and Disposition of Leaking Tank Systems. (h)310 CMR 30.698: Special Requirements for Ignitable, Reactive, and Incompatible Hazardous Wastes, and Hazardous Wastes That Are Polyhalogenated Aromatic Hydrocarbons. (i)310 CMR 30.699(1) and (2): Closure and Post-closure Care, except that: 1. a generator need only comply with the following closure requirements of 310 CMR 30.580: a.310 CMR 30.582: Closure Performance Standard; and b.310 CMR 30.585: Disposal or Decontamination of Equipment. 2. a generator need not comply with the requirements of 310 CMR 30.590: Post-closure and 310 CMR 30.900: Financial Responsibility.Amended by Mass Register Issue 1404, eff. 11/15/2019.