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(g) The owner or operator shall design, cot, operate, and main-
<br />tain a run—off management system to collect an control at least the water
<br />volume resulting from a 24—heur, 25—year storm.
<br />(h) Collection and holding facilities (e.g., tanks or basins) associated
<br />with run—on and run—off control systems shall be emptied or otherwise
<br />managed expeditiously aper storms to maintain design capacity of the
<br />system.
<br />(i) If the landfill contains any particulate matter which may be subject
<br />to wind dispersal, the owner or operator shall cover or otherwise manage
<br />the landfill to control wind dispersal.
<br />0) The Department shall specify in the permit all design and operating
<br />practices that are necessary to ensure that the requirements of this section
<br />are satisfied.
<br />(k) The landfill shall be designed, constructed, operated and main-
<br />tained to enable the facility to meet the closure and post—closure require-
<br />ments of section 66264.310.
<br />Nor- Authority cited: Sections 208, 25150 and 25159, Health and Safety Code.
<br />Reference: Sections 25150, 25159 and 25159.5, Health and Safety Code; 40 CFR
<br />Section 264.301.
<br />HISTORY
<br />New section filed 5-24-91; operative 7-1-91 (Register 91, No. 22).
<br />§ 66264.303. Monitoring and inspection.
<br />(a) During construction or installation, liners (except in the case of ex-
<br />isting portions of landfills exempt from 66264.301(a)) and cover systems
<br />(e.g., membranes, sheets, orcoatings) shall be inspected for uniformity,
<br />damage, and imperfections (e.g., holes, cracks, thin spots, or foreign ma-
<br />terials). Immediately after construction or installation:
<br />(1) synthetic liners and covers shall be inspected to ensure tight seams
<br />and joints and the absence of tears. punctures, or blisters; and
<br />(2) soil—based and admixed liners and covers shall be inspected for im-
<br />perfections including lenses, cracks, channels, root holes, or other struc-
<br />tural non—uniformities that may cause an increase in the permeability of
<br />the liner or cover.
<br />(b) While a landfill is in operation, it shall be inspected weekly and af-
<br />ter storms to detect evidence of any of the following:
<br />(1) deterioration, malfunctions, or improper operation of run—on and
<br />run—off control systems;
<br />(2) proper functioning of wind dispersal control systems, where pres-
<br />ent;
<br />(3) the presence of liquids in leak detection systems; and
<br />(4) the presence of leachate in and proper functioning of collection and
<br />removal systems, where present.
<br />NoTe Authority cited: Sections 208.25 150 and 25159, Health and Safety Code.
<br />Reference: Sections 25150.25159 and 25159.5, Health. and Safety Code; 40 CFR
<br />Section 264.303.
<br />HISTORY
<br />1. New section filed 5-24--91; operative 7-1-91 (Register9l, No. 227).
<br />§ 66264.309. Surveying and Recordkeeping.
<br />The owner or operator of a landfill shall maintain the following items
<br />in the operating record required under section 66264.73:
<br />(a) on a map, the exact location and dimensions, including depth, of
<br />each cell with respect to permanently surveyed benchmarks with hori-
<br />zontal and vertical controls; and
<br />(b) the contents of each cell and the approximate location of each haz-
<br />ardous waste type within each cell.
<br />Nom- Authority cited: Sections 208,25 150 and 25159. Health and Safety Code.
<br />Reference: Sections 25 150, 25159 and25159.5, Health andSafety Code; 40 CFR
<br />Section 264.309.
<br />HISTORY
<br />1. New section tiled 5-24-91; operative 7-1-91 (Register 91. No. 2,27).
<br />§ 66264.310. Closure and Post -Closure Care.
<br />(a) At final closure of the landfill or upon closure of anycell, the owner
<br />oroocrator shall cover the landfillor cell with a final cover designed and
<br />constructed to:
<br />(1) prevent the downward entry of water into the closed landfill
<br />throughout a period of at least 100 years:
<br />(2) function with minaintenance;
<br />(3) promote drainage*rnirruze erosion or abrasion of the cover
<br />(4) accommodate settling and subsidence so that the cover's integrity
<br />is maintained;
<br />(5) accommodate lateral and vertical shear forces generated by the
<br />maximum credible earthquake so that the integrity of the cover is main-
<br />tained;
<br />(6) have a permeability less than or equal to the permeability of any
<br />bottom liner system or natural subsoils present; and
<br />(7) conform to the provisions of subsections (e) through (r) of section
<br />66264.223, except that the Department shall grant a variance from any
<br />requirement of subsections (e) through (r) which the owner or operator
<br />demonstrates to the satisfaction of the Department is not necessaryto pro-
<br />tect public health, water quality or other environmental quality.
<br />(b) After final closure, the owner, or operator must comply with all
<br />post—closure requirements contained in sections 66264.117 through
<br />66264.120, including maintenance and monitoring throughout the post—
<br />closure care period specified in the permit under section 66264.117. The
<br />owner or operator must:
<br />(1) maintain the integrity and effectiveness of the final cover, includ-
<br />ing makingrepairs to the cap as necessary to correctthe effects of settling,
<br />subsidence, erosion, or other events;
<br />(2) continue to operate the leachate collection and removal system un-
<br />til leachate is no longer detected. :
<br />(3) maintain and monitor- the groundwater monitoring system and
<br />comply with all other applicable requirements of article 6 of this chapter,
<br />(4) prevent run-on and run-off from eroding or otherwise damaging
<br />the final cover, and
<br />(5) protect and maintain surveyed benchmarks used in complying with
<br />section 66264.309.
<br />(c) Unless the owner or operatorcan demonstrate to the satisfaction of
<br />the Department that significant amounts of toxic or flammable gas or va-
<br />por will not be emitted by waste and that no gas will be emitted that is ca-
<br />pable of disrupting the cover or causing other property damage, the own-
<br />er or operator shall provide a control system designed to prevent
<br />migration of gas. The control system shall be designed to collect gases
<br />that are emitted from the buried waste and convey gas or vapor to a flare,
<br />incinerator or treatment device that will render the gas or vapor harmless
<br />to public health or safety, or to a collection system that allows gas to be
<br />exported for use or treatment elsewhere. Any gas collection system used
<br />shall be designed to withstand pressures that may result from overburden
<br />weight of structure that may overlie the cover, and traffic thatmay occur.
<br />(d) If gas orvapor that can be expected to be cmicted from buried waste
<br />aherclosure would be flammable ortoxic, the ownershall describe in the
<br />closure plan measures to render such gases or vapors harmless, or export
<br />gas from the site. for as many years as they would be emitted from the
<br />waste, and shall estimate the cost of such measures as part of the cost of
<br />closure and post—closuro care of the facility. In that case, the closure pian
<br />shall provide a map showing:
<br />(1) the number, spacing and locations of wells to be used for gas extrac-
<br />tion;
<br />(2) the location and spacing of piping. Also in that case, the closure
<br />plan shall describe the equipment and capability of equipment, to be pro-
<br />vided to render gases orvapor harmless or export gas for use or treatment
<br />elsewhere. If pumping would be needed to assure that such gas is with-
<br />drawn at a rate sufficient to avoid hazardous accumulation of gas orvapor
<br />or uncontrolled migration of such gas or vapor or uncontrolled migration
<br />of such gas or vapor from the facility, the owner or operator shall describe
<br />measures to provide such pumping for as many years as such gas or vapor
<br />will be emitted from the waste, and shall estimate the cost of such mea-
<br />sures as part of the cost of closure and post -closure care of the facility.
<br />The closure plan shall in that case describe the tvpe of PUMP, volume of
<br />gas the Dump can move per unit time, and the estimated distances from
<br />the pump from which gas can be extracted from the landfill. The owner
<br />or operator shall provide such measures as needed.
<br />Page 758.9
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