|
, e
<br /> Harvest-Lathrop Composting Facility - 5- 7 February 2018
<br /> San Joaquin County
<br /> Ponds 1 and 2 Wettest Season, Required Design
<br /> Available Wastewater Storm Reserve Remaining
<br /> Capacity' Storage in Ponds' Capacity' capacity°
<br /> Month (Gallons) (Gallons) (Gallons) (Gallons)
<br /> February 3,528,189 2,955,361 1,196,369 (623,541)
<br /> March 3,528,189 3,262,087 1,196,369 (930,267)
<br /> April 3,528,189 3,065,570 1,196,369 (733,750)
<br /> May 3,528,189 2,190,570 1,196,369 141,250
<br /> June 3,528,189 1,315,570 1,196,369 1,016,250
<br /> July 3,528,189 440,570 1,196,369 1,891,250
<br /> August 3,528,189 258,536 1,196,369 2,073,284
<br /> September 3,528,1891 83,536 1,196,369 2,248,284
<br /> ' Does not include 1-foot freeboard volume
<br /> z Net increase in wastewater storage in ponds after accounting for evaporation and
<br /> operational use(dust control and moisture conditioning of composting piles)
<br /> 3 Required storage to accommodate 25-year 24-hour Design Storm (2.71 inches) runoff
<br /> from working surfaces and falling into ponds
<br /> 4 Remaining storage capacity in ponds.
<br /> The table above shows that the Discharger will need to implement a contingency plan for
<br /> handling additional wastewater runoff during a wettest year wet season to maintain reserve
<br /> storage capacity for the 25-year 24-hour Design Storm of 2.71 inches if the Design Storm
<br /> has not already occurred by the 1 February. As a contingency plan, the Discharger can
<br /> mobilize and install above ground portable storage tanks for containment of wastewater
<br /> should a wet season occur comparable to the wettest season currently on record. Another
<br /> option is trucking wastewater to a wastewater treatment plant for disposal. Section 10(b)
<br /> Monitoring and Reporting of this memorandum provides the procedures to be followed to
<br /> notify, monitor, and report when the Discharger shall implement a contingency plan if the
<br /> Design Storm has not already occurred by 1 February.
<br /> The Discharger must submit a final design report with detailed design information at least 90
<br /> days prior to new construction of working surfaces, detention ponds, berms, ditches, or any
<br /> other water quality protection containment structure for approval by the Central Valley Water
<br /> Board. The final design information must include final water balance calculations for
<br /> detention ponds, final design of wastewater conveyance features, liner materials and
<br /> thicknesses, and rationale for liner system design. The design report must ensure testing
<br /> and quality assurance of liner materials and compacted soils in accordance with commonly
<br /> accepted engineering practices, American Society for Testing and Materials test methods,
<br /> and/or other appropriate material standards. This testing includes final electronic leak
<br /> location survey of any geomembrane barrier layer. The Discharger must submit a post-
<br /> construction report to the Central Valley Water Board within 60 days of completing all
<br /> construction activities associated with all applicable containment and monitoring structures,
<br /> as required for compliance with this General Order and the MRP.
<br />
|