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Stormwater Pollution Prevention Plan <br /> 3. Sample discharge location daily until the analysis results are less than 25 <br /> NTU(turbidity) or greater than 33 cm (transparency). <br /> If the turbidity is greater than 25 NTU(or transparency is less than 33 cm) but less than 250 <br /> NTU(transparency greater than 6 cm) for more than 3 days, additional treatment BMPs will be <br /> implemented within 24 hours of the third consecutive sample that exceeded the benchmark <br /> value. Additiional treatment BMPs to be considered will include, but are not limited to, off-site <br /> treatment, infiltration, filtration and chemical treatment. <br /> If the 250 NTU benchmark for turbidity(or less than 6 cm transparency) is exceeded at any time, <br /> the following steps will be conducted: <br /> 1. Notify Ecology by phone within 24 hours of analysis(see Section 5.0 of <br /> this SWPPP for contact information). <br /> 2. Continue daily sampling until the turbidity is less than 25 NTU(or <br /> transparency is greater than 33 cm). <br /> 3. Initiate additional treatment BMPs such as off-site treatment, infiltration, <br /> filtration and chemical treatment within 24 hours of the first 250 NTU <br /> exceedance. <br /> 4. Implement additional treatment BMPs as soon as possible, but within 7 <br /> days of the first 250 NTU exceedance. <br /> 5. Describe inspection results and remedial actions taken in the site log book <br /> and in monthly discharge monitoring reports as described in Section 7.0 of <br /> this SWPPP. <br /> 6.2.2 pH Sampling <br /> pH sampling will not be required according to the 2011 Construction Stormwater General Permit <br /> (Appendix I)) due to the absence of significant concrete work or engineered soils. <br /> SWPPP Page 15 <br /> Delta Tidelands—Site Grading June 2016 <br />