NEXGEN assisted with environmental permitting and completed the design for the Stockton East Water Districts (SEWDs) North Site Groundwater Recharge Pond Project. SEWD acquired the 230-acre North Site in 2014 to expand its groundwater recharge efforts.
During the design phase, the scope was expanded to develop the recharge basin into a parallel pre-treatment train. Advantages of this process include (1) the ability to pre-treat two water sources with different chemical additions at the same time and (2) gives a redundant pre-treatment system when one needs to be taken off-line for maintenance. Other items included improved flow measurement, SCADA controls, and valve automation. NEXGEN worked with Gateway Pacific Contractors, Inc. to produce the fixed price for the contract, and maintained the pricing for the project when changes were required for site conditions that were discovered during construction. NEXGEN produced the design-build documents and provided construction management on an as-needed basis.