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Taj M. Bahadori -2- 21 January 2016 San Joaquin County DPW Stockton A LCRS functionality test was also conducted in accordance with the approved work plan to verify that the LCRS was functioning properly. The test included the injection of tracer (water colored with dye) directly into the LCRS gravel immediately upstream of the repaired area after which the LCRS sump was checked for recovery of the tracer. The test results indicated that the LCRS was functioning properly. After completion of the LCRS test, the portion of the operations Layer removed to allow injection of the tracer was filled in and the area re-surveyed to establish as-built elevations. The Repairs Report includes a certification that all repairs to the damaged area of Module 5 were conducted in accordance with the 26 October 2015 approved work plan and approved project specifications and CQA. The report also certifies that the LCRS for the module is functioning as designed. Based on these certifications and a review of the report, Water Board staff hereby acknowledges that the repairs to the damaged area of Module 5 have been completed. We also received the final as-built report for Module 5, Phase 1, the review of which has been on hold pending approval of the Repairs Report. We will be providing our response to the final as- built report in a separate letter. If you have any questions, please contact me by telephone at (916) 464-4641 or by email at john.moody@waterboards.ca.gov. John Moody, P.E. Water Resource Control Engineer Title 27 Permitting and Mines Enclosures 1. Module 5 Interim Approval Letter 2. Module 5 Repair Area Drawing cc: Christine Karl, Permitting & LEA Support, CalRecycle, Sacramento Robert McClellon, San Joaquin County Environmental Health Department, Stockton Michael Raub, Advanced Earth Sciences, Inc., Irvine