Middle St. Johns - Florida Department of Environmental Protection

162
Water Quality Assessment Report: Middle St. Johns
Table 4.2 (contined)
Planning
Unit
Lake
Jesup
Lake
Jesup
Lake
Jesup
WBID
2997L
2997P
Waterbody
Segment
Lake
Winyah
Lake
Concord
Waterbody
Type
Lake
Lake
1998
303(d)
Parameters
of Concern
Parameters
Identified
Using
the 2002
Impaired
Surface
Waters Rule
Nutrients
(TSI)
Nutrients
(TSI)
2997R Lake Adair Lake Nutrients
(TSI)
Priority for
TMDL
Development *
Projected
Year for TMDL
Development *
Comments
Medium 2008 Colimitation of N and P based
on a TN/TP median of 13
(275 values) during the planning
period and a median
of 13 (191 values) during the
verified period. Planning
period: 7 TSI annual means
exceeded 60 (1991–1998);
verified period: 3 TSI annual
means exceeded 60 (1996–
1998, 2001). 269 TN values,
median 0.81 mg/L, mean 0.85
mg/L. 269 TP values, median
0.061 mg/L, mean 0.06 mg/L.
Medium 2008 Colimitation of N and P based
on a TN/TP median of 17 (284
values) during the planning
period and a median of 17
(203 values) during the verified
period. Planning period:
2 TSI annual means exceed
threshold of 60 (1996, 2000);
verified period: 2 TSI annual
means exceed threshold
of 60 (1996, 2000). 254 TN
values, median 0.71 mg/L,
mean 0.74 mg/L. 313 TP
values, median 0.04 mg/L,
mean 0.05 mg/L.
Medium 2008 Colimitation of N and P based
on a TN/TP median of 13
(321 values) during the planning
period and a median of
15 (231 values) during the
verified period. Planning
period: 9 TSI annual means
exceeded 60 (1991–2000);
verified period: 5 TSI
annual means exceeded 60
(1996–2001) and 1 TSI annual
mean exceeded 40 (2002).
337 TN values, median 1.02
mg/L, mean 1.10 mg/L. 333
TP values, median 0.08 mg/L,
mean 0.10 mg/L.