1300 W MARINE VIEW DR 2018-01-02 MF Import

Page 19 of 46 Alternatively, discharge turbidity may be measured at the point where the discharge leaves the construction site, rather than in the receiving waterbody. 2. Based on sampling, if the discharge turbidity exceeds the water qualiry standard for turbidity (more than 5 NTU over background turbidiry when the background turbidity is 50 NTU or less, or mote than a 10% increase in turbidity when the background turbidity is more than 50 NTU), all furure discharges shall comply with a numeric effluent limit which is equal to the water quality standard for turbidiry. 3. If a future discharge exceeds the water qualiry standard for turbidity, the Permittee shall: a. Review the SWPPP for compliance with Condition S9 and make appropriate revisions within 7 days of the discharge that exceeded the standard; b. Fully implement and maintain appropriate source control and/or treatrnent BMI's as soon as possible, but within 10 days of the discharge that exceeded the standard; c. Document BMP implementation and maintenance in the site log book; d. Notify the appropriatc Ecology Regional Office by phone within 24 hours of analysis; e. Continuc to sample daily until discharge mrbidity meets the water quality standard for mrbidity. C. Discharaes to waterbodies on the 303(dl list for Hieh aH Permittees which discharge to waterbodies on the 303(d) list for high pH shall conduct sampling at one of the following locations to evaluate compliance with the water qualiry standard for pH (in the range of 6.5 — 8.5): a. pH shall be mcasured at the point of discharge into the 303(d) listed waterbody, inside the area of influencc of the discharge; or b. Altematively, pH may be measured at the point where the discharge leaves the consmiction sitc, rathcr than in the recciving water. 2, Based on the sampling set forth above, iCthe pH exceeds the water quality standard for pH (in the range of 6.5 — 8.5), all future discharges shall comply with a numeric efFluent limit which is cqual to the water quality standard for pH. 3. If a future dischargc exceeds the water quality standard for pH, the Permittee shall: a. Review thc SWPPP for compliance with Condition S9 and make appropriate revisions within 7 days of thc discharge tiiat exceeded the water quality standard;