Section 460.120 - Removing and Making Intact Lead-based Paint and Other Coatings(A) Only the following methods are permissible for removal of lead-based paint, other coating, plaster or putty. (1) Wire brushing or wet scraping alone or with the aid of a non-flammable solvent or abrasive compound not containing methylene chloride. Dry scraping, while permitted, is generally not recommended because of its dust-generating character.(2) Hand sanding or machine sanding using a sander equipped with a HEPA filter vacuum to feather edges and prepare substrate for repainting or sealing.(3) Controlled, low-level heating element which produces a temperature not exceeding 1,000°F.(5) Dip-tank solvent (off-site).(6) For exterior use only: abrasive blasting using a wet-misting technique or simultaneous vacuuming system.(7) Any other method approved by the Director.(B) All methods not listed in 105 CMR 460.120 or otherwise approved by the Director are prohibited for use in lead paint removal including, but not limited to: (1) Torch or flame burning.(2) Dry abrasive blasting using sand, grit or any particulate except as indicated in 105 CMR 460.120(A).(3) On-site use of methylene chloride or solutions containing methylene chloride.(4) Use of potassium or sodium hydroxide-based solutions, except in paste forms on interior surfaces.(5) Machine sanding, except as indicated in 105 CMR 460.120(A).(C) For properties listed on the State Register of Historic Places, the following methods for removing lead-based paint, other coating, plaster or putty on site, usually in combination, may be appropriate depending on the substrate and its condition. Any method can cause damage to the substrate if used improperly. Testing of products and strict controls on workmanship are recommended. For removing lead-based paint, other coating, plaster or putty from a component or fixture which has been removed and taken off site, see105 CMR 460.140. (1) Softening paint with heat guns, heat plates, or steam.(2) Stripping with solvent-based, non-caustic chemical solutions.(3) Scraping, without gouging woodwork.(4) Sanding, by hand, to finish.(5) Mechanical sanding with orbital sander with HEPA filter attachment, only as a finishing or smoothing tool.(6) Mechanical sanding with belt sander with HEPA filter attachment, only on a flat surface and by a skilled operator.(7) Abrasive blasting with sand or other gritty substances, when used with a wet misting technique or simultaneous vacuuming system, only in the following situations: (a) Industrial interior masonry or wood surfaces without significant design, detailing, tooling, or finish.(b) Cast and wrought iron and steel.(d) Delicate abrasive cleaning supervised by an architectural conservator.(8) Any other method approved by the Director to be used in properties listed on the State Register of Historic Places.(D) All leaded materials and/or lead residues shall be disposed of in accordance with applicable regulations of the Department of Environmental Protection, all applicable federal regulations including, but not limited to, those of the Department of Housing and Urban Development and the Environmental Protection Agency, and all applicable local regulations and ordinances.Amended by Mass Register Issue 1353, eff. 12/1/2017.