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Notes pertaining to Report. <br />In 2015 we were asked to replace the existing wastewater plant for the West Lane MHP. The <br />plant process that was used is the extended aeration version of activated sludge. The plant is of <br />advanced treatment for wastewater. The system consists of flow equalization tank (EQ), sludge <br />holding tank (digester), aeration tank, clarifier tank, and chlorine contact tank. This design <br />process was selected as it meets the effluent requirements set by the California Regional Water <br />Quality Board and system was approved by the board. San Joaquin County then issued a <br />construction permit based upon the plans. <br />The EQ tank is designed so that the peak and surge flows are controlled due to the size of the <br />tank to maintain a constant uniform flow through the plant process during the day. Therefore, <br />the surge and peak flows don't affect the system process. <br />The aeration tank is designed to have an aeration system that will supply air at intervals to the <br />wastewater. At certain set times the plant blowers will supply sufficient air to the wastewater <br />to provide nitrification cycle and at certain times the blowers will be off to have the mixed <br />liquor (aeration contents) in an anoxic state that prides cycle for denitrification. Lab test are <br />run on a quarterly basis to determine the nitrates as N. <br />There are no plans to make any adjustments to the wastewater treatment process. <br />Due to the age of the existing leach field, we were asked to make repairs as needed improve <br />the effluent disposal system. Are scope under this part is to determine the best alternative for <br />effluent disposal, either deep trenches or wells. Based on the work your company has <br />performed this information will be used to design an effluent system. Are plan is to use the <br />maximum flow rate from the plant for sizing of the system. The existing wells well then be <br />taken off line and will be retained as backup for the system. <br />Attached is the drawing furnished by the manufacturer for the package plant. <br />Let me know if this helps explain our goal in this project. <br />Thanks, <br />Gary <br />