(Adopted February 1, 1980)

Rule 1140. Abrasive Blasting

(a) Definitions Forthe purpose ofthis rule the following definitions shall apply: (1) Abrasive is any material used in an abrasive blasting operation including but not limited to sand, slag, steel shot, garnetorwalnut shells. (2) Abrasive 131 asting isthe cleaning orpreparing ofa surface by forcibly propelling a stream ofabrasive material againstthe surface. (3) Abrasive Blasting Equipment is any equipment used in abrasive blasting operations. (4) Confined Blasting is any abrasive blasting conducted in an enclosure which significantly restricts aircontaminants from being emitted to the ambient’. atmosphere, including but not limited to shrouding, tanks, drydocks, buildings, structures. (5) Hydroblasting is any abrasive blasting using high pressure liquid as the propelling force. (6) Multiple Nozzle describes more than one nozzle being used to abrasive blastthe same surface in such close proximitythattheir separate plumes

are indistinguishable. (7) Permanent Abrasive Blasting Operation or Equipment is any abrasive blasting operation conducted, orabrasive blasting equipment located, in a building which is used, in whole or in part, for abrasive blasting operations. (8) Sandblasting is abrasive blasting. (9) Source is tl~ impact surface from any single abrasive blasting nozzle. (10) Unconfined Blasting is any abrasive blasting which does not conform with definitions (4) or (7) ofthis section. (11) Vacuum Blasting is any abrasive ‘blasting in which the spent abrasive and surface material is immediately collected by avacuum device. (12) WetAbrasive .Blasting is any abrasive blasting using compressed airas the propelling force, which in thejudgement ofthe airpollution control officer uses an amount ofwater adequate to minimize the plume.

(b) Operating Requirements (1) No person shall, ifhe complies with an applicable performance standard in-Section (b)(4), discharge into the atmosphere from any abrasive

1140-1Rule 1140 (Cont.) (Adopted February 1, 1980)

blasting any air contaminantfora period orperiods aggregating more than three minutes in any one hourwhich is: (A) As darkordarker in shade asthat designated as No. 2 on the Ringelmann Chart, as published bythe United States Bureau of Mines, or (B) Ofsuch opacity as to obscure an observer’s viewto a degree equal to orgreaterthan does smoke described in Section (b)(1)(A). 2) No person shall, ifhe is not complying with an applicable performance standard in Section (b)(4), discharge into the atmosphere from any abrasive blasting any aircontaminantfora period orperiods aggregating

more than three minutes in any one hourwhich is: (A) As darkordarker in shade as that designated as No. 1 on the Ringelmann Chart, as published bythe United States Bureau of Mines, or (B) Ofsuch opacity as to obscure an obsener’s viewto a degree equal to or greaterthan does smoke described in Section (b)(2)(A). (3) Compliance with all rules and regulations in this subchapterdoes not exempt any person from complying with the requirements ofRule 402, Nuisance. (4) Any abrasive blasting operation except as provided for in Section (c)(2) shall comply with at least one ofthe following performance standards: (A) Confined blasting shall be used; (B) Wet abrasive blasting shall be used; (C) Hydroblasting shall be used; or (D) Dry unconfined blasting shall use abrasives as defined in Section(c). (5) Surface -preparation for raisedtraffic delineating markers and pavement marking removal using abrasive blasting shall comply with at least one of the following performance standards: (A) Wet abrasive blasting, hydroblasting, orvacuum blasting shall be used; (B) Dry unconfined abrasive blasting for removal or surface preparation for immediate application ofpavement markings of less than 1,000 square feet orfor surface preparation for raised traffic delineating markers shall use abrasives as defined in Section(c)(1).
1140-2Rule 1140 (Cont.) (Adopted February 1, 1980)

(c) Requirements forAbrasives (1) Except as provided in Section (c)(3) all abrasives used for dry unconfined blasting shall complywith the following performance standards: (A) Before blasting the abrasive shall not contain more than 1% by weight material passing a No. 70 U.S. Standard sieve. (B) After blasting, the abrasive shall not contain more than 1.8 percent by weight material five microns or smaller. (2) No person shall conduct dry unconfined blasting unless the abrasive(s) used in such operation have been certified by the Air Resources Board, on at least an annual basis, to comply with the performance standards set forth in Section (c)(1). (3) Certified abrasives i~used for dry unconfined blasting are exempt from Section (c)(1)(B), but must conform to Section (c)(1)(A). (4) All manufacturers and suppliers ofabrasives certified fordry unconfined abrasive blasting shall legibly and permanently label the invoice, bill of lading and abrasive packaging orcontainerwith the following information: (A) The manufacturer’s name or identifiable trade name. (B) The grade or brand name ofthe abrasive. (C) The statement “ARB certified fordry unconfined blasting”.

(d) Test Method All abrasives used fordry unconfined blasting shall comply with the performance requirements ofSection (c)(1)(A) and (c)(1)(B) when tested in accordance with “Method ofTestforAbrasive Media Evaluation, Test Method No. Calif. 371-A”,

or othertest method approved by the Executive Officer. (e) Visible Emission Evaluation Visible emission evaluation ofabrasive blasting operations shall be conducted in accordance with Title 17 ofthe CaliforniaAdministrative Code, Subchapter 6. (f) Effective Dates The owner oroperator ofany abrasive blasting operation subjectto this rule shall comply with the provisions ofthis rule on the date ofadoption.

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