1133.1 – 1 (Adopted January 10, 2003)(Amended July 8, 2011)

RULE 1133.1 CHIPPING AND GRINDING ACTIVITIES

(a) Purpose The purpose of this rule is to prevent inadvertent decomposition occurring during chipping and grinding activities, including stockpi le operations.

(b) Applicability This rule applies to operators of chipping and grin ding activities to produce materials other than active or finished compost, un less otherwise exempted under subdivision (f) of this rule. The requirements of Rule 403 – Fugitive Dust, also apply to these activities.

(c) Definitions For the purposes of this rule, the following defini tions shall apply: (1) ACTIVE COMPOST is material that is in the process o f being rapidly decomposed and is biologically unstable. Active co mpost is generating temperatures of at least 122 degrees Fahrenheit dur ing decomposition. Active compost includes, but is not limited to, pat hogen-reduced mulch. (2) AGRICULTURAL CHIPPING AND GRINDING is any chipping and grinding activity conducted at an agricultural site where organic waste material is generated on-site by the production and /or processing of farm products, and the chipped and ground organic waste material is used onsite. (3) CHIPPING AND GRINDING is any activity that mechanic ally reduces the size of greenwaste, woodwaste, and/or foodwaste

. (4) COMPOSTING is a process in which solid organic wast e materials are decomposed in the presence of oxygen under controll ed conditions through the action of bacteria and other microorgan isms. (5) COMPOST OVERS are the oversized woody materials tha t do not decompose in a typical composting cycle and are scr eened out of finished product at the end of composting. Compost overs ha ve been through the pathogen reduction process outlined in Title 14, Se ction 17868.3 of the California Code of Regulations.Rule 1133.1 (cont.) (Amended July 8, 2011)

1133.1 – 2 (6) CURBSIDE GREENWASTE is greenwaste that is collected from receptacles designated for residential household gr eenwaste. Curbside greenwaste also includes screened curbside greenwas te containing only grass clippings, leaves, and/or twigs that is not c onsidered non-curbside greenwaste as defined in paragraph (c)(13). (7) FINISHED COMPOST is a humus-like material and/or co mpost overs that result from the controlled biological decompos ition of organic waste materials and is biologically stable. (8) FOODWASTE is any food scraps collected from the foo d service industry, grocery stores, or residential food scrap collection. Foodwaste also includes food scraps that are chipped and grou nd. (9) GREENWASTE is any organic waste material generated from gardening, agriculture, or landscaping activities including, b ut not limited to, grass clippings, leaves, tree and shrub trimmings, and pl ant remains. It includes curbside, non-curbside, and mixed greenwaste. (10) INADVERTENT DECOMPOSITION is decomposition of green waste and/or foodwaste associated with stockpiling greenw aste and/or foodwaste for an extended period of time, and is not consider ed part of normal chipping and grinding operations. (11) LANDCLEARING is an activity where trees and plants grown at the site are cut, then chipped or ground and removed from th e site to clear the site. (12) MIXED GREENWASTE is curbside greenwaste that is mix ed with noncurbside greenwaste. (13) NON-CURBSIDE GREENWASTE is any greenwaste that is n ot collected from receptacles designated for residential househo ld greenwaste. (14) PALM CHIPPING AND GRINDING is any activity that mec hanically reduces the size of palm trees waste. (15) PORTABLE CHIPPING AND GRINDING is chipping and grin ding utilizing equipment with a manufacturer's rating of 170 brake horsepower

or less. (16) RAINY DAY is any day with at least 0.05 inches of r ain reported by the National Weather Service or a cooperative weather r eporting station for the site closest to where the chipping and grinding activity occurs.Rule 1133.1 (cont.) (Amended July 8, 2011)

1133.1 – 3 (17) STOCKPILE is a supply of raw material tipped and st ored prior to being

utilized on-site or removed from the site. Raw mat erials before and after chipping and grinding are also included. (18) WET WEATHER CONDITIONS are weather conditions follo wing a rainy day not to exceed 10 days. (19) WOODWASTE is lumber, and the woody material portion of mixed

demolition wastes and mixed construction wastes. W oodwaste also includes large wood materials of curbside greenwast e or mixed greenwaste that is screened or unscreened, such as tree trimmings, branches, tree trunks, stumps, and limbs exceeding 2 inches in any

dimension.

(d) Requirements The operator of a chipping and grinding activity sh all comply with the following requirements: (1) Foodwaste shall not be taken at the facility, unles s otherwise allowed by the Local Enforcement Agency to handle foodwaste. (2) Chip or grind and utilize on-site or remove curbsid e, non-curbside, or mixed greenwaste from the site within 48 hours of r eceipt, excluding observance of official federal and state holidays, or up to seven days maximum, with approval from the Local Enforcement A gency. (3) Maintain all the operational records for the prior five years of operation, with the most recent two years retained at the faci lity, which shall be immediately available upon request by the Executive Officer. The remaining three years of records shall be made avai lable to the Executive Officer within one week of request. (4) Maintain the following records, as applicable, on-s ite for two years: (A) A copy of the facility’s AQMD registration and annu al updates submitted in compliance with Rule 1133; (B) Records of date, type, and amount of greenwaste rec eived; (C) Records of date, type, amount of greenwaste removed from the site, and location where they are transferred to; (D) Records of dates of rainy days and wet weather cond itions and description of specific conditions that limited nor mal operations;Rule 1133.1 (cont.) (Amended July 8, 2011)

1133.1 – 4 (E) Records of temperature or moisture content measurem ents; and (F) Records of dates and amount of curbside greenwaste chipped and ground. (5) The time requirements specified in paragraph (d)(2 ) may be extended by the number of rainy days and wet weather conditions that impede normal chipping and grinding operations provided that reco rds are maintained in accordance with subparagraph (d)(4)(D).

(e) Moisture Content Measurement Moisture content will be determined by collecting at least 10 samples of chipped and ground greenwaste from various locations of the pile at a depth of at least 12 inches below pile surface. The samples shall then be mixed thoroughly and analyzed for moisture content by ASTM method D4442 (December 2007), ASTM method D4444 (May 2008) or ASTM method E871-82 (Dec ember 2006).

(f) Exemptions (1) Chipping and grinding activities of greenwaste deri ved from the site and utilized on-site shall be exempt from the requireme nts of paragraphs (d)(2), (d)(3), and (d)(4), provided less than 1,00 0 cubic yards of materials are either sold or given away. (2) Portable chipping and grinding, agricultural chippi ng and grinding, land clearing chipping and grinding, woodwaste chipping and grinding, and palm chipping and grinding activities shall be exem pt from the requirements of paragraphs (d)(2), (d)(3), and (d)( 4). (3) Chipped and ground curbside greenwaste shall be exe mpt from the requirements of paragraph (d)(2) provided that the moisture content is less than 30%, measured in accordance with subdivision ( e) and the temperature or moisture content measurements are ma intained on-site in accordance with subparagraph (d)(4)(E). (4) A biomass power generation facility or a facility p rocessing material as a biomass fuel for a biomass power generation facilit y shall be exempt from the requirements of paragraph (d)(2) provided that the material temperature is maintained at below 122 degrees Fahr enheit or the moisture content is less than 30%, measured in accordance wi th subdivision (e) and the temperature or moisture content measurements ar e maintained on-siteRule 1133.1 (cont.) (Amended July 8, 2011)

1133.1 – 5 in accordance with subparagraph (d)(4)(E). This ex emption shall not apply to material processed for purposes other than biomass fuel. (5) The operator of a landfill or biomass power generat ion facility shall be exempt from the requirements of paragraph (d)(4), p rovided that the operator does not perform chipping and grinding of greenwaste on-site.