2018-06-26_PERMIT FILE - M1977141

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EXHIBIT B Aggregate Industries-WCR,Inc. Inert Material Acceptance Policy General Conditions Importing and backfilling of inert materials at Aggregate Industries-WCR mine sites requires notification to and approval by the Colorado Division of Reclamation,Mining and Safety (DRMS). In support of the required notice of intent to DRMS,an affidavit must be submitted that the material is clean and inert as defined in DRMS rules,as follows: "Inert Materials"means non-water-soluble and non-putrescible solids together with such minor amounts and types of other materials,unless such materials are acid or toxic producing,as will not significantly affect the inert nature of such solids. The term includes,but is not limited to,earth,sand,gravel,rock,concrete which has been in a hardened state for at leas sixty days,masonry,asphalt paving fragments and other inert solids. To assure compliance with DBMS regulations and with Aggregate Industries'environmental standards,the following general conditions shall apply to the acceptance of inert materials and the backfilling of inert materials at Aggregate Industries sites: I. Inert Materials should not be accepted from an unknown site. Entities desiring to bring inert materials onto any Aggregate Industries site for backfilling must complete and sign an Aggregate Industries Inert Materials Profile Form. 11. All loads,or at a minimum the initial few loads being delivered,should be at least visually inspected. a. If Inert Materials are brought in and there is a suspicion that the material might be contaminated,such as strong odors of garbage,gasoline or other,the material should not be accepted and should not be unloaded. b. If other waste is observed,such as lumber,painted material,more than incidental amounts of wood,vegetation or debris,the material should not be unloaded. 11. If unloaded,contaminated material will have to be picked up and sent to a landfill or back to the generator. a. If the contaminated materials were unloaded,then reloaded to be sent back to the generator,the generator must be notified. Simply loading the contaminated material and dumping at the site of generation without notification could be considered illegal disposal by Aggregate Industries if there has not been an agreement to take the materials back. b. Unless contaminated materials are easy to visually identify,soil samples will have to be taken to document that all contamination is removed and the receiving site is clean. III. A record of the quantity of material brought in(tons/yardsynumber of loads delivered must be recorded. IV. Concrete must have been in a hardened state for at least sixty(60)days prior to placing in a fill area. V. Asphalt must be placed a minimum of three(3)feet above the groundwater table.