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ATTACHMENT#3 1/11 11111111141111- .pumps CONTRACTOR'S LICENSE#133783 C57 A Chi!/D21 CR U 10 w. NI"UC7K . 76 , CA 95666 SALES&SERVICE (530) 661KE-6'737 FAAVEQ`(530) 661-674700LAND March 21,2018 Wayne Archer Pump Repair Service 405 Allen Street Daly City,California 94014-1627 RE: City of Pleasanton Well#5 Dear Wayne, After review of the videotape of the 2/13/18 of the City of Pleasanton well#5, it appears that the well has approximately 65-75%of the screened sections plugged with encrustation and mineral deposition. At this time with the pump removed from the well, it would be the most cost efficient time to proceed with a well rehabilitation. I have proposed a comprehensive chemical mechanical procedure consisting of rotary scratching,formulated chemistry and zone isolated airlifting to remove heavy encrustations within the perforated sections of the casing. The procedure would be the injection of formulated chemistry through a double disc swab,swabbing the perforated areas of the well to push the chemistry throughout the gravel pack,and contact the formations. The chemistry and debris will then be removed into onsite 21,000 tank,neutralized if necessary before discharging into a sanitary system or permitted discharge point. However,due to the site location and safety concerns at this location Eaton's will mobilize to the location to complete this work immediately following the school year starting June 4,2018. The project will take approximately 12-14 days to complete to provide a complete comprehensive cleaning of the well based on the current recommended and procedure. As a contingency I have included in the attachment costing for the supply and installation of up to two swage patches if it becomes necessary for installation. If there are not required they would be removed from the costing. Notes: I. All fluids discharged will be directed to a 21K onsite tank, neutralized,and checked for Ph. (6.0-7.0), before discharging into a sanitary sewer system. If a sanitary sewer is not available a water truck is to be provided from the City of Pleasanton to remove the water from the onsite tank and transported to a dump facility. 2. A permit may be required for the discharge of development fluids and any applicable permit i.e.NPDES or equal will need to be provided by The City of Pleasanton.