§ 15.60.175. Prevention of accidental and/or slug discharges.

For the purposes of this subsection, a slug discharge is any discharge of a non-routine, episodic nature, including but not limited to an accidental spill or a non-customary batch discharge. All industrial users shall provide such facilities and institute such procedures as are reasonably necessary to prevent or minimize the potential for accidental discharge into the POTW of waste regulated by this permit from liquid or raw material storage areas, from truck and rail car loading and unloading areas, from in-plant transfer or processing and materials handling areas, from diked areas or holding ponds. The permittee shall notify the POTW immediately by telephone of any slug loadings, spills, bypasses, upsets, etc., and a follow up written notification within five days, as prescribed in 40 CFR 403.8(f)(2)(v).

*Significant industrial users are required to notify Metro immediately of any changes at its facility affecting the potential for a slug discharge. Metro must evaluate all SIUs for the need for a slug control plan or other actions. Any new SIUs shall be evaluated for the need of a slug control plan within twelve (12) months of being permitted by the department. Existing SIUs may be required to review and resubmit a revision of the slug control plan at the request of the department. Should the department decide that a slug control plan is needed by the industrial user, the plan shall contain, at a minimum, the following elements;

A.

Description of discharge practices, including non-routine batch discharges;

B.

Description of stored chemicals;

C.

Procedures for immediately notifying the POTW of slug discharges, including any discharge that would violate a prohibition under 40 CFR 403.5(b), with procedures for follow-up written notification within five days;

D.

If deemed necessary by the director, procedures to prevent adverse impact from accidental spills, including inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of plant site run-off, worker training, building of containment structures or equipment, measures for containing toxic organic pollutants (including solvents), and/or measures and equipment for emergency response.

(Ord. BL2010-678 § 2, 2010)