Replace the 3Rd Paragraph of Section 13-8.01A With

Replace the 3rd paragraph of section 13-8.01A with: You may discharge into a publicly owned treatment works system instead of an ATS. Obtain a ___, ___, and ___ if uncontaminated groundwater, storm water, or both are discharged to a publicly owned treatment works. You are responsible for all costs and requirements related to obtaining the ___, ___, and ___, and discharging the water.

Replace the 2nd paragraph of section 13-8.01A with: The design, installation, operation, and monitoring of an ATS and monitoring of the treated effluent must comply with Attachment E of NPDES Permit for Storm Water Discharges Associated with Construction Activity in the Lake Tahoe Hydrologic Unit, Counties of Alpine, El Dorado, and Placer (Order No. R6T- 2011-0019, NPDES No. CAG616002).

Replace the 1st paragraph of section 13-8.01B(4) with: If an NEL is exceeded, immediately notify the Engineer and submit an NEL violation report within 2 hours. The report must include: 1. Field sampling results and inspections, including: 1.1. Parameters, analytical methods, reporting units, and detection limits. Report analytical results less than the method detection limits as "less than the method detection limits." 1.2. Date, location, time of sampling, visual observations, and measurements. 1.3. Quantity of precipitation of the storm event. 2. Description of current on-site BMPs and proposed corrective actions taken to manage NEL exceedance.

Replace section 13-8.01B(6) with: 13-8.01B(6) Quality Assurance and Quality Control Plan Submit a QA and QC plan within 20 days of Contract approval. The quality assurance and quality check plan must include: 1. Calibration methods and frequencies for all system and field instruments 2. Method detection limits (MDLs) for each residual coagulant measurement method and acceptable minimum MDLs for each method, specific to individual coagulants 3. Requirements for monthly laboratory duplicates for residual coagulant analysis

Add to the end of section 13-8.01C: Provide training to each ATS operator. The training must be: 1. Specific to the operation of the ATS and liquid coagulants for storm water discharges in the State, including: 1.1. Coagulation basics, such as chemistry and physical processes 1.2. ATS system design and operating principles 1.3. ATS control systems 1.4. Coagulant selection, such as jar testing and dose determination 1.5. Handling and safety measures for toxicity of coagulants 1.6. Monitoring, sampling, and analysis 1.7. Reporting and recordkeeping 1.8. Emergency response 2. Formal class with testing, a certificate, and certificate renewal requirements 3. Minimum of 8 hours of classroom training and 32 hours of field training Replace the 2nd paragraph of section 13-8.02A with: Design and implement an ATS to capture and treat a volume equal to the runoff from a 20-year, 1-hour storm event, which equals 1-inch of rainfall in a 1-hour period.

Add between the 3rd and 4th paragraphs of section 13-8.03A: Remove sediment from the storage or treatment cells as necessary to ensure the cells maintain their required water storage capability.

Add between the 6th and 7th paragraphs of section 13-8.03B: If operating an ATS in batch-treatment mode, the discharger must perform toxicity testing that complies with the following requirements: 1. Discharger must initiate acute toxicity testing on effluent samples representing effluent from each batch before discharge. Send bioassays to a laboratory certified by the Environmental Laboratory Accreditation Program (ELAP) of the State Water Resources Control Board. The required field of testing number for whole effluent toxicity (WET) testing is E113. For the WET test, go to:

http://www.dhs.ca.gov/ps/ls/elap/pdf/FOT_Desc.pdf

2. Conduct acute toxicity tests as outlined for a 96-hour acute test in Methods for Measuring the Acute Toxicity of Effluents and Receiving Water to Freshwater and Marine Organisms, USEPA-841-R-02- 012 for Pimephales promelas (fathead minnow). The acute toxicity for Oncorhynchus mykiss (rainbow trout) may be used as a substitute for testing fathead minnows. 3. Toxicity tests must comply with QA criteria and test acceptability criteria in the most recent versions of the EPA test method for WET testing.