§ 2672. Permanent Closure Requirements.
23 CA ADC § 2672Barclays Official California Code of Regulations
23 CCR § 2672
§ 2672. Permanent Closure Requirements.
(a) Owners or operators of underground storage tanks subject to permanent closure shall comply with either subdivision (b) below for underground storage tank removal or subdivision (c) below for closure in place. It is not essential that all portions of an underground storage tank be permanently closed in the same manner; however, all closure actions shall be conducted in accordance with this section. Subdivisions (d) and (e) below apply to all underground storage tanks subject to permanent closure.
(4) The underground storage tank, except for piping that is closed in accordance with subdivision (3) above, shall be completely filled with an inert solid, unless the owner intends to use the underground storage tank for the storage of a nonhazardous substance which is compatible with the previous use and construction of the underground storage tank.
(d) The owner or operator of an underground storage tank being closed pursuant to this section shall demonstrate to the satisfaction of the local agency that an unauthorized release has not occurred. This demonstration shall be based on soil sample analysis and/or water analysis if water is present in the excavation. This analysis shall be performed during or immediately after closure activities. If the demonstration is based on soil sample analysis, soil samples shall be taken and analyzed as follows:
(1) If the underground storage tank or any portion thereof is removed, soil samples shall be taken immediately beneath the removed portions of the tank, a minimum of two feet into native material at each end of the tank in accordance with section 2649. A separate sample shall be taken for each 20 linear-feet of trench for piping.
(2) If the underground storage tank or any portion thereof is not removed, at least one boring shall be taken as close as possible to the midpoint beneath the tank using a slant boring (mechanical or manual), or other appropriate method such as vertical borings drilled on each long dimensional side of the tank as approved by the local agency.
(3) Soils shall be analyzed in accordance with section 2649 for all constituents of the previously stored hazardous substances and their breakdown or transformation products. The local agency may waive the requirement for analysis of all constituents, breakdown or transformation products when key constituents that pose a significant threat to water quality or the environment can be identified for analysis.
Credits
Note: Authority cited: Sections 25299.3, 25299.7 and 25299.77, Health and Safety Code. Reference: Sections 25298 and 25299.37, Health and Safety Code; and 40 CFR §§ 280.34, 280.60, 280.61, 280.62, 280.63, 280.64, 280.65, 280.66, 280.67, 280.71, 280.73, 280.74 and 281.36.
History
1. Amendment filed 8-9-91 as an emergency; operative 8-9-91. Text remains in effect uninterrupted pursuant to Health and Safety Code section 25299.7 (Register 92, No. 14).
2. Editorial correction of printing errors in History 1 (Register 92, No. 43).
3. Amendment of section and Note filed 4-5-94; operative 5-5-94 (Register 94, No. 14).
4. Amendment of subsections (a), (c)(4) and (d), new subsection (f) and amendment of Note filed 8-27-2018; operative 10-1-2018 (Register 2018, No. 35).
This database is current through 5/10/24 Register 2024, No. 19.
Cal. Admin. Code tit. 23, § 2672, 23 CA ADC § 2672
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