NR 665.0440(1)(1) The requirements of this subchapter apply to owners and operators of facilities that use new or existing drip pads to convey treated wood drippage, precipitation or surface water run-off to an associated collection system. Existing drip pads are those constructed before June 1, 1995 and those for which the owner or operator has a design and has entered into binding financial or other agreements for construction prior to June 1, 1995. All other drip pads are new drip pads.

NR 665.0440(2)(2) The owner or operator of any drip pad that is inside or under a structure that provides protection from precipitation so that neither run-off nor run-on is generated is not regulated under s. NR 665.0443 (5) or (6), as appropriate.

NR 665.0440(3)(3) The requirements of this subchapter are not applicable to the management of infrequent and incidental drippage in storage yards provided that the owner or operator maintains and complies with a written contingency plan that describes how the owner or operator will respond immediately to the discharge of the infrequent and incidental drippage. At a minimum, the contingency plan shall describe how the facility will do all of the following:

NR 665.0441(1)(1) For each existing drip pad as defined in s. NR 665.0440, the owner or operator shall evaluate the drip pad and determine that it meets all of the requirements of this subchapter, except the requirements for liners and leak detection systems of s. NR 665.0443 (2). No later than August 1, 2017, the owner or operator shall obtain and keep on file at the facility a written assessment of the drip pad, reviewed and certified by a qualified professional engineer that attests to the results of the evaluation. The assessment shall be reviewed, updated and re-certified annually until all upgrades, repairs or modifications necessary to achieve compliance with all of the standards of s. NR 665.0443 are complete. The evaluation shall document the extent to which the drip pad meets each of the design and operating standards of s. NR 665.0443, except the standards for liners and leak detection systems, specified in s. NR 665.0443 (2).

NR 665.0441(2)(2) The owner or operator shall develop a written plan for upgrading, repairing and modifying the drip pad to meet the requirements of s. NR 665.0443 (2), and submit the plan to the department no later than 2 years before the date that all repairs, upgrades and modifications are complete. This written plan shall describe all changes to be made to the drip pad in sufficient detail to document compliance with all the requirements of s. NR 665.0443. The plan shall be reviewed and certified by a qualified professional engineer.

NR 665.0441(3)(3) Upon completion of all upgrades, repairs and modifications, the owner or operator shall submit to the department, the as-built drawings for the drip pad together with a certification by a qualified professional engineer attesting that the drip pad conforms to the drawings.

NR 665.0441(4)(4) If the drip pad is found to be leaking or unfit for use, the owner or operator shall comply with the provisions of s. NR 665.0443 (13) or close the drip pad in accordance with s. NR 665.0445.

NR 665.0442NR 665.0442 Design and installation of new drip pads. Owners and operators of new drip pads shall ensure that the pads are designed, installed and operated in accordance with one of the following:

NR 665.0442(1)(1) All of the applicable requirements of s. NR 665.0443 (except 665.0443(1)(d)), s. NR 665.0444 and s. NR 665.0445.

NR 665.0442(2)(2) All of the applicable requirements of s. NR 665.0443 (except 665.0443(2)), s. NR 665.0444 and s. NR 665.0445.

NR 665.0443(1)(1) Drip pads shall comply with all of the following:

NR 665.0443(1)(d)1.1. Have a hydraulic conductivity of less than or equal to 1´10-7 centimeters per second, e.g., existing concrete drip pads shall be sealed, coated or covered with a surface material with a hydraulic conductivity of less than or equal to 1´10-7 centimeters per second such that the entire surface where drippage occurs or may run across is capable of containing the drippage and mixtures of drippage and precipitation, materials or other wastes while being routed to an associated collection system. This surface material shall be maintained free of cracks and gaps that could adversely affect its hydraulic conductivity, and the material shall be chemically compatible with the preservatives that contact the drip pad. The requirements of this provision apply only to existing drip pads and those drip pads for which the owner or operator elects to comply with s. NR 665.0442 (2) instead of s. NR 665.0442 (1).

NR 665.0443(1)(d)2.2. The owner or operator shall obtain and keep on file at the facility a written assessment of the drip pad, reviewed and certified by a qualified professional engineer that attests to the results of the evaluation. The assessment shall be reviewed, updated, and recertified annually. The evaluation shall document the extent to which the drip pad meets the design and operating standards of this section, except for sub. (2).