Code of Massachusetts Regulations › 310 CMR - DEPARTMENT OF ENVIRONMENTAL PROTECTION › Title 310 CMR 30.000 - Hazardous waste › GENERAL PROVISIONS › Section 30.692 - Assessment of Existing Tank System's Integrity

Current through Register 1525, July 5, 2024
(1) For each existing tank system that does
				not have secondary containment meeting the requirements of
				310 CMR
				30.694, the owner or operator shall determine
				that the tank system is not leaking and does not pose a threat of release of
				hazardous waste to the environment. By no later than June 1, 1989, the owner or
				operator shall obtain a written assessment that has been reviewed and certified
				by a Massachusetts registered professional engineer, in accordance with
				310 CMR 30.009, and
				that attests to the system's integrity. Once obtained, this assessment shall be
				kept on file at the facility until the facility has been closed pursuant to
				310 CMR
				30.699.
(2) This assessment shall correctly determine
				that the tank system is adequately designed and has sufficient structural
				strength and compatibility with the waste(s) to be stored or treated, to ensure
				that it will not collapse, rupture, or fail. In addition, the assessment shall
				correctly demonstrate that a minimum shell thickness has been maintained at all
				times to ensure sufficient shell strength. At a minimum, this assessment shall
				consider the following:
(a) Design
				standard(s), if available, according to which the tank and ancillary equipment
				were constructed;
(b) The design of
				the tank, including, without limitation, the foundation, structural support,
				seams, and pressure controls;
(c)
				Hazardous characteristics of the waste(s) that have been or are intended to be,
				handled;
(d) Existing corrosion
				protection measures;
(e) Documented
				age of the tank system, if available (otherwise, an estimate of the
				age);
(f) A soil corrosion survey
				as described in
				310 CMR
				30.693(1)(c);
(g) The width, height, and materials of
				construction of the tank, and the specific gravity of the waste that has been,
				and is intended to be, placed in the tank, in establishing minimum shell
				thickness; and
(h) Results of a
				leak test, internal inspection, or other tank integrity examination such that
1. For non-enterable underground tanks, the
				assessment shall include a leak test method that has been approved by the State
				Fire Marshal and that is capable of taking into account the effects of
				temperature variations, tank end deflection, vapor pockets, and high water
				table effects. Such a leak test must have an accuracy equal to or greater than
				0.1 gallons per hour for detecting leakage from the tank with a probability of
				detection of 0.99 and a probability of false positive of 0.01. As the state of
				the art of the technology for testing underground tanks improves, the
				Department may specify that a test with an accuracy of better than 0.1 gallons
				per hour be used; and
2. For other
				than non-enterable underground tanks and for ancillary equipment, this
				assessment shall include a leak test in compliance with 310 CMR 30.692(2)(h)1.,
				or other integrity examination, that is certified by a Massachusetts registered
				professional engineer in accordance with
				310 CMR 30.009,
				that addresses leaks, cracks, corrosion, and erosion. (Note: The practices
				described in the American Petroleum Institute (API) Publication, Guide for
				Inspection of Refinery Equipment, Chapter XIII,
Atmospheric and
				Low-Pressure Storage Tanks
, 4th edition, 1981, may be used, where
				applicable, as guidelines for conducting other than a leak test.)