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<br />. <br /> <br />. <br /> <br />8. Construction of Containment <br /> <br />a. When a plant must be placed in an area where natural containment does not <br />occur~ the plant siting crew~ fore~ or superintendent may elect to construct <br />berms or temporary basins for collection and control of storm water. Necessity <br />of construction will be based on slope of plant site, area drained~ soil type~ and <br />proximity to receiving water. Other influences may be considered on a site- <br />specific basis as needed to fulfill the purpose of the plan. <br /> <br />b. Plant personnel will inspect water collected in the on-site basins for evidence of <br />petroleum sheen or odor. Ifno evidence of contamination is apparent, the water <br />may be released by gravity flow or by pumping. Release of water must be done <br />in a manner that will not induce erosion or release water with high sediment <br />loadings into receiving water. Water collected in on-site basins that shows <br />evidence of petroleum contamination will be pumped into disposal tanks for <br />transport to approved disposal :fu.cilities. Company environmental supervisor <br />will be notified before removal and disposal of contaminated water. Any water <br />releases will be documented in the plant record. <br /> <br />c. Berms constructed for containment during plant operation will be removed~ <br />regraded or opened after the plant is removed from the site to prevent <br />unsupervised water collection. Collection areas may be recontoured and seeded <br />during site reclamation or separately. <br /> <br />9. Erosion Control Prevention <br /> <br />a. Bales~ silt fences, and settling ponds are utilized to mitigate and eliminate <br />erosion from potential problem areas. <br /> <br />b. Aggregate stockpiles are kept at a manageable slope gradient to reduce erosion. <br /> <br />c. Temporary seeding will be used to control critical area erosion, as needed~ on a <br />site-specific basis. Critical areas may include stockpiled topsoil and non-traffic <br />areas that will support vegetation. <br /> <br />d. Contours of temporary plant sites are graded to minimize runoff to critical <br />areas including waterways and stockpile areas. <br /> <br />. <br /> <br />19 <br />