(iw) Plastic piping shall be laid on undisturbed or well compacted soil. If plastic piping is to be laid in soils which may damage it, the piping shall be protected by suitable rock free materials before back-filling is completed. Plastic piping shall not be supported by blocking. Well tampered earth or other continuous support shall be used.
PSC 135.222 49 CFR s. 192.323 Addition. After 49 CFR s. 192.323 (d), insert:
(ew) Casing requirements of highway authorities shall be followed; however, construction type shall not be any less than provided by this code.
PSC 135.223 49 CFR s. 192.324w Addition. After 49 CFR s. 192.323, insert:
PSC 192.324w Rail crossings. Whenever a steel pipeline is installed under a railroad track and a casing is not used, the operator shall install the pipeline using the methods prescribed in Gas Research Institute report number GRI-91/0285, entitled “Guidelines for Pipelines Crossing Railroads and Highways."
PSC 135.224 49 CFR s. 192.325 Addition. After 49 CFR s. 192.325 (b), insert:
(bw) If the structure is a public building where people assemble or in areas such as playground, assembly ground, or park, wherever possible the clearance shall be at least 100 feet if the main is operated at more than 100 p.s.i. but less than 500 p.s.i. and shall be at least 150 feet if operated at 500 p.s.i. or more. If these clearances cannot be maintained, then the next higher type of construction shall be used except such construction may be pressure-tested the same as the remainder of the line. No distribution main or transmission line shall be installed under buildings.
PSC 135.225 49 CFR s. 192.355 Additions. (1) After 49 CFR s. 192.355 (a), insert:
(aw) Install a check valve or equivalent if:
(1) The utilization equipment might induce a back-pressure.
(2) The gas utilization equipment is connected to a source of oxygen or compressed air.
(3) Liquefied petroleum gas or other supplementary gas is used as standby and might flow back into the meter. A three-way valve installed to admit the standby supply and at the same time shut off the regular supply, can be substituted for a check valve if desired.
(2) After 49 CFR s. 192.355 (b) (3), insert:
(4w) At locations where service regulators might be submerged during floods, either a special anti-flood type breather vent fitting shall be installed, or the vent line shall be extended above the height of the expected flood waters.
PSC 135.226 49 CFR s. 192.361 Addition. After 49 CFR s. 192.361 (f), insert:
(gw) It is recommended that service to one customer and/or one building be supplied through one service and one shut-off valve.
PSC 135.227 49 CFR s. 192.365 Addition. After 49 CFR s. 192.365 (b), insert:
(bw) Whenever gas is supplied to a theatre, church, school, factory or other building where large numbers of persons assemble, an outside valve in such case will be required.
PSC 135.228 49 CFR s. 192.371 Addition. After the text in 49 CFR s. 192.371, insert:
(aw) When coated steel pipe is to be installed as a service line in a bore, care should be exercised to prevent damage to the coating during installation. For all installations to be made by boring, driving or similar methods or in a rocky type soil, the following practices or their equivalents are recommended:
(1) When a service line is to installed by boring or driving and a coated steel pipe is to be used for the service line, the coated pipe should not be used as the bore pipe or drive pipe and left in the ground as part of the service line. It is preferable to make such installations by first making an oversize bore, removing the pipe used for boring and then inserting the coated pipe.
(2) Coated steel pipe preferably should not be inserted through a bore in exceptionally rocky soil where there is a likelihood of damage to the coating resulting from the insertion.
PSC 135.229 49 CFR s. 192.375 Addition. After 49 CFR s. 192.375 (b), insert:
(cw) Plastic service lines that are not encased shall either be installed with an electrically conductive wire having adequate corrosion resistant characteristics or protection or some other acceptable means of readily locating the buried service pipe from the ground surface shall be provided.
PSC 135.230 49 CFR s. 192.377 Additions. After the text in 49 CFR s. 192.377, insert:
(aw) Copper service lines installed within a building may not be concealed.
(bw) Ferrous valves and fittings installed on underground copper service lines shall be protected from contact with the soil or insulated from the copper pipe.
PSC 135.231 49 CFR s. 192.457 Addition. After 49 CFR s. 192.457 (c), insert:
(dw) Notwithstanding the provisions of 49 CFR s. 192.457 (b) regarding active corrosion, effectively coated steel distribution pipelines, except for those portions including services and short sections that because of their nature and installation make cathodic protection impractical and uneconomical, must, not later than August 1, 1975, be cathodically protected along the entire area that is effectively coated in accordance with this subpart.
PSC 135.232 49 CFR s. 192.505 Addition. After 49 CFR s. 192.505 (e), insert:
(fw) Except in freezing weather or when water is not available, pipelines or mains larger than 6 inches in diameter, installed in class locations 1, 2, or 3, shall be hydrostatically tested in place to at least 90 percent of the specified minimum yield strength.
PSC 135.233 49 CFR s. 192.511 Addition. After 49 CFR s. 192.511 (c), insert:
(dw) Each segment of a service line (other than plastic) intended to be operated at a pressure between 0 and 1 p.s.i.g. must be given a leak test at a pressure of not less than 50 p.s.i.g.
PSC 135.234 49 CFR s. 192.613 Additions. After 49 CFR s. 192.613 (b), insert:
(cw) When street is paved or repaved. Whenever a road or street is paved or repaved with permanent pavement, the operator shall:
(1) Check for leaks along all mains and services in the streets and abutting property with a continuous-sampling instrument capable of detecting combustible gas in air concentrations of 100 parts per million.
(2) Determine condition of pipe and joints by sample visual examination, where possible.
(3) Repair any leaks found.
(4) Replace pipe if existing pipe is corroded to such an extent that it is likely to require replacement before the street is again resurfaced.
(dw) Underground pipes. Whenever underground pipes are exposed in order to repair leaks, the utility shall record on the repair order the nature of the leak and possible cause from observation.
PSC 135.235 49 CFR s. 192.614 Addition. After 49 CFR s. 192.614 (c), insert:
(dw) All operators of natural gas pipelines shall be a member of a single, state-wide one-call system. If there is more than one state-wide one-call system, the Commission may determine which system the operators will join.
PSC 135.236 49 CFR s. 192.621 Additions. (1) After 49 CFR s. 192.621 (a) (3), insert:
(3w) No person may operate a segment of a cast iron pipe in which there are unreinforced bell and spigot joints at a pressure higher than low pressure unless it can be proven to the commission that they can be operated at a higher pressure. However, the maximum allowable operating pressure under any circumstances shall not exceed 15 p.s.i.g.
(2) After 49 CFR s. 192.621 (b), insert:
(cw) Sixty p.s.i.g. in individual distribution systems or portions thereof. The intercity or supply mains for these distribution systems may be operated at higher pressures provided by this code if the number of services supplied from these mains are limited and these mains are not an integral part of the distribution system. The pressure and the services supplied from these higher pressure intercity and supply mains shall be limited to 60 p.s.i.g. unless the service lines are equipped with series regulators or other pressure limiting devices as prescribed in 49 CFR s. 192.197 (c).
PSC 135.237 49 CFR s. 192.623 Addition. After 49 CFR s. 192.623 (b), insert:
(cw) No person may operate a low pressure distribution system at a pressure in excess of that provided by s. PSC 134.23 (1).
PSC 135.238 49 CFR s. 192.629 Addition. After 49 CFR s. 192.629 (b), insert:
(cw) No pipeline, main, or service shall be purged into any building or confined space.
PSC 135.239 49 CFR s. 192.707 Addition. After 49 CFR s. 192.707 (d), insert:
(ew) When transmission lines are located outside urban areas, their location shall be marked (recognizable to the public) at each fence line, road crossing, railroad crossing, river, lake, stream, or drainage ditch crossing and wherever it is considered necessary to identify the location of a pipeline to reduce the possibility of damage or interference.
PSC 135.240 49 CFR s. 192.713 Addition. After 49 CFR s. 192.713 (a) (3), insert:
(4w) Gouges and grooves of lesser depth than 10% of the nominal wall thickness of the pipe may be removed by grinding out to a smooth contour provided the grinding does not reduce the remaining wall thickness to less than the minimum prescribed by this code for the conditions of use.
PSC 135.241 49 CFR s. 192.720w Addition. After 49 CFR s. 192.719, insert:
192.721w Repair of steel pipe operating below 40 percent of the specified minimum yield strength. If inspections at any time reveal an injurious defect, gouge, groove, dent, or leak, immediate temporary measures shall be employed to protect the property and public if it is not feasible to make permanent repair at time of discovery. As soon as feasible, permanent repairs shall be made using recognized methods of repair.
PSC 135.242 49 CFR s. 192.722w Addition. After 49 CFR s. 192.721, insert:
192.722w Distribution mains: markers. When distribution mains are located outside urban areas, their location shall be marked (recognizable to the public) at each fence line, road crossing, railroad crossing, river, lake, stream, or drainage ditch crossing and wherever it is considered necessary to identify the location of a pipeline to reduce the possibility of damage or interference.
PSC 135.243 49 CFR s. 192.723 Additions. After 49 CFR s. 192.723 (b), insert:
(cw) Every operator shall maintain a gas leak-detection program and shall maintain records of operation under the program. The program shall consist of not less than the following:
(1) In addition to 49 CFR s. 192.723 (b) (1), an additional leakage survey with a leak detection device shall be conducted over street openings in business districts (as shown by maps filed with the Commission by each utility) at intervals not exceeding 15 months, but at least once each calendar year and not more than 4 1/2 months before or after the survey required under 49 CFR s. 192.723 (b) (1).
(2) In each business district, a building survey shall be conducted at intervals not exceeding 15 months, but at least once each calendar year. The piping from the service entrance to the meter outlet and metering and regulating equipment shall be tested for gas leakage in those buildings that have gas service.
(3) A survey of all buildings used for public gatherings, such as schools, churches, hospitals, and theaters, shall be conducted at intervals not exceeding 15 months, but at least once each calendar year. The piping from the service entrance to the meter outlet and metering and regulating equipment shall be tested for gas leakage.
(4) In incorporated cities and villages, in addition to a survey of public buildings, the operator shall conduct a leak survey of all mains using a continuous-sampling instrument capable of detecting and measuring combustible gas in air concentrations of 100 parts per million. The utility may substitute for the test required by this provision a survey by mobile flame ionization or infrared gas detection units. The tests required by this provision shall be made at intervals not exceeding 15 months, but at least once each calendar year.
(5) Along all mains in unincorporated areas, a leakage survey with leak detection equipment shall be conducted at least once every two calendar years at intervals not exceeding 27 months.
(6) A leakage survey of all services conducted with an acceptable leak detection device shall be made at intervals not exceeding five years.
(7) When a leak complaint is received and the odor of gas indicates that there is a leak in or near the premises, a search shall be carried to conclusion until the leak is found.
PSC 135.244 49 CFR s. 192.724w Addition. After 49 CFR s. 192.723, insert:
PSC 192.724w Further leakage survey after repair of leak. When a leak is found and repaired, a further check shall be made in the vicinity of the repaired leak to determine if there is any other source of migrant gas in the neighborhood.
PSC 135.245 49 CFR s. 192.727 Addition. After 49 CFR s. 192.727 (f), insert:
(gw) Special efforts shall be made to include services which have not been used for ten years in a way that will remove gas from the customers' premises. The plan shall include the following provisions:
(1) If the facilities are abandoned in place, they shall be physically disconnected from the piping system. The open ends of all abandoned facilities shall be capped, plugged, or otherwise effectively sealed.
(2) In cases where a main is abandoned, together with the service lines connected to it, insofar as service lines are concerned, only the customers' end of such service lines need be sealed as stipulated above.
(3) Until the time a service is abandoned, it shall be treated as active for purposes of applying the regulations of 49 CFR s. 192. If a service line is not treated as an active line, it shall be physically disconnected at the main and purged, no later than 2 years after becoming inactive.
(4) Services that are inactive for more than two years shall be physically disconnected from the customer's piping.
PSC 135.246 49 CFR s. 192.735 Addition. After 49 CFR s. 192.735 (b), insert:
(cw) All aboveground oil or gasoline storage tanks shall be constructed and protected in accordance with the applicable codes of the Department of Commerce.
PSC 135.247 49 CFR s. 192.741 Addition. After 49 CFR s. 192.741 (c), insert:
(dw) Each low pressure distribution system must be equipped with telemetering or recording pressure gage or gages as may be required to properly indicate the gas pressure in the system at all times. At least once each year the pressure variation shall be determined throughout each system.
PSC 135.248 49 CFR s. 192.744w Addition. After 49 CFR s. 192.743, insert:
PSC 192.744w Service regulators and associated safety devices: inspection and testing. Company service regulators and associated safety devices on customers' premises shall be inspected and tested periodically to determine whether they are in proper operating condition. This shall include testing of the set pressure of the regulator at a specific flow rate, determination of the lock-up pressure, and determination as to whether there are any leaks, internal or external, associated with the regulator. The test interval shall be the same as the interval between meter changes in the meter rotation program, s. PSC 134.30.
PSC 135.249 49 CFR s. 192.747 Addition. After the text in 49 CFR s. 192.747, insert:
(aw) Inspection shall include checking of alignment to permit use of a key or wrench and clearing from the valve box or vault any debris which would interfere or delay the operation of the valve. Records shall be maintained to show specific valve location and such records shall be made continuously accessible to authorized personnel for use under emergency conditions.
(bw) Existing connections in the form of inline valves between low pressure gas distribution systems and high pressure gas distribution systems shall be physically severed by January 1, 1974.
(cw) The by-pass valves in district regulator stations supplying gas to a low pressure distribution system shall be sealed, locked or otherwise be rendered incapable of operation, except by authorized personnel by January 1, 1974.
PSC 135.250 49 CFR s. 192.751 Addition. After 49 CFR s. 192.751 (c), insert:
(dw) Whenever the accidental ignition in the open air of gas-air mixture might be likely to cause personal injury or property damage, precautions shall be taken as, for example:
(1) Prohibit smoking and open flames in the area.
(2) Install a metallic bond around the location of cuts in gas pipes to be made by other means than cutting torches.
