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• Saw cutting and Surface Pollution Prevention (BMP C152) <br /> Construction concrete washout is planned to be done onsite using an eco-pan type system <br /> pending approval from Boeing EHS. On a weekly basis the eco pans will be disposed of offsite <br /> at an approved facility. <br /> Installation Schedules: Throughout the project <br /> Inspection and Maintenance plan: Eco pans will be disposed of on a weekly basis <br /> Responsible Staff: Hoffman Construction <br /> Adjust pH of stormwater if outside the range of 6.5 to 8.5 su. <br /> Obtain written approval from Ecology before using chemical treatment with the exception of CO2 <br /> or dry ice to modify pH. <br /> Concrete trucks must not be washed out onto the ground, or into storm drains, open ditches, <br /> streets, or streams. Excess concrete must not be dumped on-site, except in designated <br /> concrete washout areas with appropriate BMPs installed. <br /> 1 26 <br />