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Stormwater Pollution Prevention Plan <br /> documented in the site log book or forms provided in this document. All new BMPs or design <br /> changes will be documented in the SWPPP as soon as possible. <br /> 6.1.1 Site Inspection Frequency <br /> Site inspections will be conducted at least once a week and within 24 hours following any <br /> rainfall event which causes a sheet flow of stormwater across disturbed areas. For sites with <br /> temporary stabilization measures, the site inspection frequency can be reduced to once every <br /> month. <br /> 6.1.2 Site Inspection Documentation <br /> The site inspector will record each site inspection using the site log inspection forms provided in <br /> Appendix E. The site inspection log forms may be separated from this SWPPP document,but <br /> will be maintained on-site or within reasonable access to the site and be made available upon <br /> request to Ecology or the local jurisdiction. <br /> 6.2 Stormwater Quality Monitoring <br /> The construction site is greater than one acre in size, and does not discharge to an impaired water <br /> body, and is therefore subject to the general water quality monitoring requirements set forth in <br /> the 2020 Construction Stormwater General Permit (Appendix D). <br /> Turbidity sampling and monitoring will be conducted during the entire construction phase of the <br /> project. Samples will be collected per the monitoring plan at the monitoring locations noted in <br /> the TESC plans in Appendix A. If there is no flow in these locations, the attempt to sample will <br /> be recorded in the site log book and reported to Ecology in the monthly Discharge Monitoring <br /> Report (DMR) as "No Discharge". <br /> 6.2.1 Turbidity Sampling <br /> Monitoring requirements for the proposed project may include either turbidity or water <br /> transparency sampling to monitor site discharges for water quality compliance with the 2020 <br /> Construction Stormwater General Permit (Appendix D). Sampling will be conducted at all <br /> discharge points at least once per calendar week. <br /> Turbidity or transparency monitoring will follow the analytical methodologies described in <br /> Section S4 of the 2020 Construction Stormwater General Permit(Appendix D). The key <br /> benchmark values that require action are 25 NTU for turbidity(equivalent to 32 cm <br /> transparency) and 250 NTU for turbidity(equivalent to 6 cm transparency). If the 25 NTU <br /> benchmark for turbidity(equivalent to 32 cm transparency) is exceeded, the following steps will <br /> be conducted: <br /> 1. Ensure all BMPs specified in this SWPPP are installed and functioning as <br /> intended. <br /> SNBL USA, LTD—Seaway Commercial Center <br /> SWPPP 15 August, 2022 <br />