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Submit the approved SWPPP to the ENGINEER before beginning construction . Include in the SWPPP , the " Contractor' s Affidavit Regarding Erosion Control and Treatment of Dewatering Water and Stormwater From the Construction Site" (located at the end of this Section ) . 1 . 6 " POLLUTION " AND CERTAIN UNCONTESTABLE POLLUTION EVENTS DEFINED A. With respect to this Section and as may be further defined in paragraphs 1 . 6 . 13 , 1 . 6 . C , and 1 . 6 . D , "pollution " is the presence in off-site waters of any substances , contaminants , or manmade or human-induced impairment of off-site waters or alteration of the chemical , physical , biological , or radiological integrity of off-site water in quantities or at levels which are or may be potentially harmful or injurious to human health or welfare , animal or plant life , or property. Pollutants to be removed include but are not limited to , sediment and suspended solids , solid and sanitary wastes , phosphorus , nitrogen , pesticides , oil and grease, concrete truck washout, stucco mixer washout, curb machine washout, washout from other construction equipment, construction chemicals , and construction debris . B . When the Discharge is Directly Into an Existing Water Body , Pollution Occurs When . An existing water body (including ditches and canals) is defined to be polluted by the CONTRACTOR' s operations when at any time , the turbidity of the water immediately downstream of the CONTRACTOR Is discharge point(s) is at least 29 nephelometric turbidity units ( NTUs) higher than the turbidity of the background water upstream of the discharge point(s) . [See Fla . Administrative Code 62- 302 . 530] Exception : When the discharge is directly into or through an outfall discharging into " Outstanding Florida Waters , " designated by Florida Statute 403 . 061 (27) , the turbidity of the discharged water cannot exceed the turbidity of the immediate receiving water. The ENGINEER or OWNER shall determine the locations where the turbidity is measured . Co When the Discharge is not Directly Into an Existing Water Body , Pollution Occurs When . . . In some instances , dewatering water or stormwater runoff from the construction site or work area may reach a water body indirectly, such as after traveling through pipes or by overland flow. Before construction commences , the Contractor will measure background levels of total suspended solids (TSS) and turbidity , in the immediate vicinity of the discharge water' s ultimate discharge point into the . receiving water body. If the discharge water's TSS and turbidity measurements exceed these pre-construction background values by 20 percent for TSS and 29 NTUs for turbidity, then the discharge from the CONTRACTOR's operations is defined to be polluted . D . Pollution Always Occurs When . . . The discharge from a construction site or work area is defined to be polluted whenever the pH of the discharge is less than 6 . 5 or greater than 8 . 5 , or whenever any of the following is present in the discharge water: ( 1 ) Hazardous waste or hazardous materials in any quantity, (2) Any petroleum product or by-product in any quantity , (3) Any chemical in any quantity , or (4) Concentrated pollutants . 01025-5 Technical Specifications FAIDublic Works\ENGINEERING DIVISION PROJECTS\0545-66Th Ave SR60 to 57th St (Arcadis)Wdmim\Bid Documents\Technical RnPrifiratinnc dne% }