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I <br /> Stormwater Pollution Prevention Plan <br /> prior to discharge to surface water. Samples will be analyzed forpH usinga calibrated <br /> g p yz d ca ibrated pH meter <br /> ' and recorded in the site log book. <br /> The key benchmark pH value for stormwater is a maximum of 8.5. If a pH greater than 8.5 is <br /> measured in the sedimentation trap/pond(s)that has the potential to discharge to surface water, <br /> the following steps will be conducted: <br /> 1. Prevent (detain) all discharges from leaving the site and entering surface waters or <br /> storm drains if the pH is greater than 8.5 <br /> 2. Implement CO2 sparging or dry ice treatment in accordance with Ecology BMP <br /> C252. <br /> i 3. Describe inspection results and remedial actions that are taken in the site log book <br /> and in monthly discharge monitoring reports as described in Section 7.0 of this <br /> SWPPP. <br /> 1 <br /> 1 <br /> I <br /> I <br /> 1 <br /> 1 <br /> I <br /> 1 <br /> I <br /> I <br /> f <br /> 18 <br />