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EXHIBIT A Reservoir Inspection,Cleaning&Repair Bid#OSD 2021-604 d) Contractor shall document its turbidity and pH monitoring and provide to the City log sheets at the end of the project. Daily log sheets shall be kept on site and available for City inspection daily. e) At any time, if the City determines the filtration and sediment management plan is not functioning according to the submittal and discharge restrictions,the Contractor shall immediately implement measures, which may include additional equipment or temporary suspension of cleaning operations, to bring the management plan back into conformance at no additional cost to the City. f) All sediment accumulated behind the filtering barriers shall be removed daily. g) All sediment accumulated shall be properly stockpiled and covered to protect it from the elements until disposal by the Contractor. h) No sediment or soil shall be disposed on-site. i) All sediment within the Baker-type storage tanks, and all, Baker-type storage tanks and sediment bags shall be removed within two weeks of completion of tank cleaning. j)The soil and filter bags shall be properly contained and covered(during inclement weather)until disposal. Bags may be left uncovered during dry weather. C. Cleaning Cleaning shall be accomplished without creating any visible turbidity which shall be monitored by constant live video feed to the surface and turbidity monitoring by City personnel. Contractor supplied video monitors shall be always at reservoir site(s) and available for viewing by City personnel. Reservoir cleaning shall commence after the Contractor mobilizes onto the site and sets up its equipment for the cleaning work. Reservoir cleaning shall be by a diver using surface supplied air and shall include vacuum removal of sediment and removal by hand of any debris too large to be vacuumed up. The dive operation shall include an audio system to permit two-way communication to relay specific requests to the diver, and a camera mounted on the diver's helmet shall allow those outside the tank to see what the diver is looking at. The Contractor shall provide storage tanks for containment of sediment-laden water removed from the potable water storage facility by vacuum cleaning, chemical treatment (if required) to enhance sediment settling, and filtration to meet the requirements of the discharge permit. Filtered water shall be discharged in strict accordance with the current governing discharge permit. The current governing discharge permit can be found on the California State Water Resources Control Board website at http://www.swrcb.ca.gov/water issues/programs/stormwater and following the links to the Municipal Program in Region 5. Cleaning procedures must combine adequate brushing of surfaces cleaned,in addition to removing material from the reservoirs by water suction. In addition to cleaning all sediment or other material from the floor of the reservoirs, the divers must ensure that all sediment is removed from all floor or floor to wall seams, top surfaces of support column bases, plumbing fixtures and supports, inlet/outlet pipe structure, or any other area where the vacuum does not reach during normal floor cleaning. Brushing shall be done in conjunction with vacuuming to remove potentially hazardous biofilm. A stationary or fixed brush inside a vacuum head will be considered, provided that the Contractor's methodology is thoroughly described and demonstrated to remove biofilm.Hydraulic Rate Sheet Page 4 of 8