2030 Plan - Grand Strand Water and Sewer Authority

(7) Green Sea-Floyds WWTP
The Green Sea-Floyds WWTP has been expanded to 15,250 GPD. This expansion
included minor plant modifications and added filters. The land application site was
expanded to accommodate the additional flows. As the flows increase in the area, a force
main will be constructed to connect to the Loris WWTP, and the Green Sea WWTP will
be decommissioned.
(8) Bucksport WWTP
The Bucksport WWTP will be converted to a storage facility when the new
Bucksport/Tip Top Regional WWTP becomes operational and the flows will be diverted
to the new Bucksport WWTP.
(9) Longs WWTP
The Longs WWTP flows have been diverted to the Vereen WWTP. The Longs plant will
remain in service as equalization and pumping facility.
b. Effluent Disposal
In 1999, DHEC, the Waccamaw COG, and all the major wastewater dischargers in the
Waccamaw region agreed to an allocation of waste loads for discharge of treated
wastewater into the Waccamaw River and AIWW. The waste loads were developed
through a long-term study and mathematical model of the receiving waters in the region.
These waste loads were issued for the southern and northern portions of the Waccamaw
and AIWW and are expressed as pounds of Ultimate Oxygen Demand (UOD) per day.
The UOD is the amount of oxygen demanding substances that can be assimilated by the
waters at critical low flow periods and still maintain the levels of oxygen established by
regulations for maintaining healthy coastal rivers with naturally low levels of oxygen.
The following table shows the waste loads determined by DHEC and agreed upon by the
dischargers.
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