NR 664.1055(2) (2) Each closed-purge, closed-loop or closed-vent system required in sub. (1) shall meet one of the following requirements:

NR 664.1055(2)(a) (a) It returns the purged process fluid directly to the process line.

NR 664.1055(2)(b) (b) It collects and recycles the purged process fluid.

NR 664.1055(2)(c) (c) It is designed and operated to capture and transport all the purged process fluid to a waste management unit that complies with the applicable requirements of ss. NR 664.1084 to 664.1086 or a control device that complies with s. NR 664.1060.

NR 664.1055(3) (3) In-situ sampling systems and sampling systems without purges are exempt from subs. (1) and (2).

NR 664.1055 History History: CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06.

NR 664.1056 NR 664.1056 Standards: open-ended valves or lines.

NR 664.1056(1) (1) 

NR 664.1056(1)(a) (a) Equip each open-ended valve or line with a cap, blind flange, plug or a second valve.

NR 664.1056(1)(b) (b) The cap, blind flange, plug or second valve shall seal the open end at all times except during operations requiring hazardous waste stream flow through the open-ended valve or line.

NR 664.1056(2) (2) Operate each open-ended valve or line equipped with a second valve in a manner such that the valve on the hazardous waste stream end is closed before the second valve is closed.

NR 664.1056(3) (3) When a double block and bleed system is being used, the bleed valve or line may remain open during operations that require venting the line between the block valves but shall comply with sub. (1) at all other times.

NR 664.1056 History History: CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06.

NR 664.1057 NR 664.1057 Standards: valves in gas or vapor service or in light liquid service.

NR 664.1057(1) (1) Monitor each valve in gas, vapor or light liquid service monthly to detect leaks by the methods specified in s. NR 664.1063 (2) and comply with subs. (2) to (5), except as provided in subs. (6) to (8) and ss. NR 664.1061 and 664.1062.

NR 664.1057(2) (2) If an instrument reading of 10,000 ppm or greater is measured, a leak is detected.

NR 664.1057(3) (3) 

NR 664.1057(3)(a) (a) Any valve for which a leak is not detected for 2 successive months may be monitored the first month of every succeeding quarter, beginning with the next quarter, until a leak is detected.

NR 664.1057(3)(b) (b) If a leak is detected, monitor the valve monthly until a leak is not detected for 2 successive months.

NR 664.1057(4) (4) 

NR 664.1057(4)(a) (a) When a leak is detected, repair it as soon as practicable, but no later than 15 calendar days after the leak is detected, except as provided in s. NR 664.1059.

NR 664.1057(4)(b) (b) Make a first attempt at repair no later than 5 calendar days after each leak is detected.

NR 664.1057(5) (5) First attempts at repair include, but are not limited to, the following best practices where practicable:

NR 664.1057(5)(a) (a) Tightening of bonnet bolts.

NR 664.1057(5)(b) (b) Replacement of bonnet bolts.

NR 664.1057(5)(c) (c) Tightening of packing gland nuts.

NR 664.1057(5)(d) (d) Injection of lubricant into lubricated packing.

NR 664.1057(6) (6) Any valve that is designated, as described in s. NR 664.1064 (7) (b), for no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, is exempt from sub. (1) if the valve meets all of the following requirements:

NR 664.1057(6)(a) (a) It has no external actuating mechanism in contact with the hazardous waste stream.