The project aims for beneficial re-use of native/virgin soil previously excavated at Zone 7’s Patterson Pass Water Treatment Plant (PPWTP) in Livermore. Specifically, Zone 7 Water Agency will have a contractor deliver 5,600 cubic yards of virgin soil from PPTWP to Zone 7’s Del Valle Water Treatment Plant (DVWTP) where it will be re-purposed in support of ongoing operations there. Hauling is expected to occur on Saturday October 16, 2021.
The contractor will be delivering soil at DVWTP using super dump trucks which hold approximately 13 cubic yards. The total number of loads will be approximately 430. Delivery and stock piling of the soil at DVWTP will take up to 12 hours. Zone 7 staff and equipment will consist of two equipment operators, one bulldozer, one rubber tire loader, and 1-2 laborers to direct trucks were to dump and to keep access road wet to control dust. This is being done on a weekend day to avoid traffic concern and to be less impactful on daily operation of the treatment plants.
The soil that is being delivered at DVWTP will be placed in a low area between drying beds 4 and 5. This area will act as a parking area for the Zone 7 dump truck and heavy equipment. The filling of the low area will be completed by December 3, 2021. Filling of the low area will be done in lifts and each lift will be compacted; the final lift will be ¾” base rock. Zone 7 staffing and equipment will consist of two equipment operators, 1 bulldozer, 1 rubber tire loader, 1 padfoot roller, and 1-2 laborers for dust control.