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164. Permit item 23.5: Following visual monitoring which occurs within 24 hours after a rainfall event, do you conduct the next visual monitoring of your system seven (7) days after that rainfall event? ❑ Yes ❑ No 165. Permit item 23.6: Does your treatment system utilize three (3) benchmark monitoring stations? Table 1 in Appendix A in the permit must be used for the parameters, units of measure, and frequency of measurement for each station. ❑ Yes ❑ No 166. Permit item 23.7: Do you collect grab samples or flow -weighted 24-hour composite samples at your treatment system? ❑ Yes ❑ No 167. Permit item 23.8: Are your treatment system samples, excluding potential of hydrogen (pH) samples, analyzed by a laboratory certified by the Minnesota Department of Health and/or the MPCA? ❑ Yes ❑ No 168. Which of the following do your sample tests include? (Check all that apply) 168.A. ❑ Sample preservation and test procedures for the analysis of pollutants that conform to 40 CFR Part 136 and Minn. R. 7041.3200. 168.13. ❑ Detection limits for dissolved phosphorus, dissolved aluminum, and dissolved iron that are a minimum of 6 micrograms per liter (pg/L), 10 pg/L, and 20 pg/L, respectively. 168.0 ❑ pH that is measured within 15 minutes of sample collection using calibrated and maintained equipment. 169. Permit item 23.9: In the following situation(s) do you perform corrective action(s) and immediately notify the Minnesota Department of Public Safety Duty Officer? (Check all that apply) 169.A. ❑ The pH of the discharged water is not within the range of 6.0 and 9.0. 169.13. ❑ Indications of toxicity or measurements exceeding water quality standards which could endanger human health, public drinking water supplies, or the environment. 169.C. ❑ A spill or discharge or alteration resulting in water pollution, as defined in Minn. Stat. § 115.01, subd. 13, of alum or ferric chloride. 170. Permit item 23.13: Do you conduct site -specific jar testing using typical and representative water samples in accordance with the most current approved version of ASTM D2035? (Note: All or some of this item is a new permit requirement. Compliance with new requirements is required within 12 months after receiving permit coverage.) ❑ Yes ❑ No 171. Permit item 23.14: Do you have baseline concentrations of the following parameters in the influent and receiving waters at your treatment system location? (Check all that apply) 171.A. ❑ Aluminum or iron 171.13. ❑ Phosphorus 172. Permit item 23.15: Do you have the following system parameters and how each was determined at your treatment system location? (Check all that apply) 172.A. ❑ Flocculant settling velocity 172.13. ❑ Minimum required retention time 172.C. ❑ Rate of diversion of stormwater into the system 172.D. ❑ The flow rate from the discharge of the outlet structure 172.E. ❑ Range of expected dosing rates 173. Permit item 23.16: Have you developed the following site -specific procedures? (Check all that apply) 173.A. ❑ Procedures for the installation, operation and maintenance of all pumps, generators, control systems, and other equipment. 173.13. ❑ Specific parameters for determining when the solids must be removed from the system and howthe solids will be handled and disposed of. 173.C. ❑ Procedures for cleaning up and/or containing a spill of each chemical stored on site. Complete last page and submit using Adobe Acrobat Reader. (If you do not have Acrobat Reader, you can download a free version at https://get.adobe.com/reader/.) https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats wq-strm4-49a • 9123120 Page 31 of32