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materials)for reclamation, mulches,sediment control,and other beneficial purposes. (Therefore, materials of
<br /> this kind will be placed in stockpiles in locations designated during various phases of mining.)Clean construction
<br /> debris(such as materials from clearing and grubbing, asphaltic cement concrete rubble, Portland cement
<br /> concrete rubble, and excavated soil and rock)may be used for backfill and related use on site for reclamation
<br /> and road construction/maintenance, as provided by haulers, and in accordance with DRMS requirements for
<br /> verification of nature and condition.Any soils/rock contaminated (potential or actual)by hazardous materials
<br /> (including water-priority chemicals)shall be treated or removed during reclamation, in accordance with standard
<br /> procedures and government requirements for handling,transport, and disposal. This includes fuel, lubricants,
<br /> road salts,dust control materials, cleaning products, pesticides and unused fertilizers.
<br /> Holes,etc. (3,1.5(6))
<br /> There are no drill holes,auger holes, adits or shafts to reclaim. Due to past use of the land by USFS and other
<br /> agencies,there may be concrete structures(such as slabs or footings)and pipes and cables present which will
<br /> be removed and properly used or disposed of before and during reclamation.
<br /> Maximum slopes(3.1.5M)
<br /> For most areas on the perimeter of the mined areas,slopes of 2H:1 V or less,as proposed, are compatible with
<br /> surrounding conditions and land use. In some locations, such as the western edge of the mined area at the
<br /> crest of Oakbrush and North Oakbrush Hills,final slopes may be steeper to match adjacent hillsides. If there are
<br /> any areas with slopes steeper than 2H:1 V, an engineer will review for stability and stabilization measures(such
<br /> as but not limited to:grouting, placement of sandbags, block walls(such as Keystone TM or similar),wire mesh,
<br /> gabions,etc.)or have retaining structures as needed, and submit reports or technical revisions as necessary.
<br /> Note that the average natural existing slopes range from 2H:1 V and 1 VA H with some localized steeper slopes.
<br /> Because the operation is on a hillside,the floor of the pit at the end of mining and as reclaimed will in general
<br /> match pre-existing slope, an average of 20 feet lower in elevation. However,the need to have flatter areas both
<br /> during mining and post-reclamation(some with grades as flat as 2%or less) requires that some portions of the
<br /> floor will be steeper,as much as 3HA V or 2H:1 V,to provide the flatter areas. These cannot be shown in the
<br /> reclamation plans due to their location being dependent on currently-unknown subsurface conditions(including
<br /> the contact between deposit to be mined and basement rock(shale,etc.)Potentially, some technical revision
<br /> with accompanying engineering stability analysis may be required during actual mining and reclamation.
<br /> Use of farm equipment(3.1.5(8))
<br /> There is no intent to use farm equipment except as feasible for seeding as part of reclamation, Access roads will
<br /> be usable by standard ranching vehicles and equipment. Haul roads and access roads will be suitable for use by
<br /> fire service vehicles used for wildland fire fighting.
<br /> Notice of other backfill(3.1.50)
<br /> The Applicant will comply with this requirement to notify the Division if other backfill is used. Use of clean
<br /> construction debris,such as soil, subsoil,waste rock,overburden,clean Portland or asphaltic cement concrete
<br /> rubble,for backfill,to be covered by soil as appropriate for intended post-mining use, is proposed. No acid-
<br /> bearing materials,tailings,or other toxic or potentially toxic materials shall be used. When in doubt,standard
<br /> characterization methods shall be used to evaluate the suitability of such materials for use on site. Records of
<br /> off-site sources of backfill material shall be maintained for the life of the operation, in accordance with CDRMS
<br /> requirements, including notarized certification statements as needed.
<br /> Prevention of unauthorized release of pollutants to surface water(3.1.5(10))
<br /> The Applicant will handle chemicals, equipment, materials, and mined material to be disposed of on-site in a way
<br /> to prevent unauthorized release of pollutants to surface water and comply with this requirement.
<br /> Prevention of unauthorized release of pollutants to-groundwater(3.1.501))
<br /> The Applicant will handle chemicals, equipment, material(mined, handled, stored,or disposed of on-site) in a
<br /> way to prevent unauthorized release of pollutants to groundwater,and comply with this requirement.
<br /> General water hydrology and water quality(3.1.60))
<br /> Hydrology and water quality issues are addressed at length in Exhibit G. No surface discharge to waters of the
<br /> State is planned or expected.The Applicant will comply with applicable water and water rights laws and
<br /> C&J Gravel Products, Inc. Page 22 of 93 20 OCT 2021
<br /> Application for Permit: Oakbrush Hill Gravel M-2021- C&J-DPR-V5-001
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