6.3 PCSR 04-26-2016 - Laserfiche WebLink

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8. Construction of Containment a. When a plant must be placed in an area where natural containment does not occur,the plant siting crew, foreman,or superintendent may elect to construct berms or temporary basins for collection and control of stonn water.Necessity of construction will be based on slope of plant site, area drained, soil type,and proximity to receiving water. Other influences may be considered on a site-specific basis as needed to fulfill the purpose of the plan. b. Plant personnel will inspect water collected in the on-site basins for evidence of petroleum sheen or odor. If no evidence of contamination is apparent,the water may be released by gravity flow or by pumping. Release of water must be done in a manner that will not induce erosion or release water with high sediment loadings into receiving water. Water collected in on-site basins that shows evidence of petroleum contamination will be pumped into disposal tanks for transport to approved disposal facilities. Company environmental supervisor will be notified before removal and disposal of contaminated water. Any water releases will be documented in the plant record. c. Berms constructed for containment during plant operation will be removed,regraded or opened after the plant is removed from the site to prevent unsupervised water collection. Collection areas may be recontoured and seeded during site reclamation or separately. 9. Erosion Control Prevention a. Bales, silt fences,and settling ponds are utilized to mitigate and eliminate erosion from potential problem areas. b. Aggregate stockpiles are kept at a manageable slope gradient to reduce erosion. c. Temporary seeding will be used to control critical area erosion,as needed,on a site- specific basis. Critical areas may include stockpiled topsoil and non-traffic areas that will support vegetation. d. Contours of temporary plant sites are graded to minimize runoff to critical areas including waterways and stockpile areas.