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Middle St. Johns - Florida Department of Environmental Protection

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354 Water Quality Assessment Report: <strong>Middle</strong> <strong>St</strong>. <strong>Johns</strong><br />

WBID<br />

Waterbody<br />

Segment Name<br />

Waterbody<br />

Type<br />

Waterbody<br />

Class<br />

1998 303(d)<br />

Parameters<br />

<strong>of</strong> Concern<br />

3004 Little Wekiva Canal <strong>St</strong>ream 3F Dissolved<br />

Oxygen and<br />

BOD<br />

3004 Little Wekiva Canal <strong>St</strong>ream 3F Coliform<br />

Bacteria<br />

Parameters<br />

Identified Using<br />

the IWR<br />

Dissolved Oxygen<br />

and BOD<br />

Fecal Coliform<br />

Bacteria<br />

Proposed<br />

<strong>St</strong>atus<br />

Verified<br />

List<br />

Verified<br />

List<br />

3004 Little Wekiva Canal <strong>St</strong>ream 3F Nutrients Nutrients (Chla) Verified<br />

List<br />

Integrated<br />

Report<br />

Category 1<br />

Priority<br />

for<br />

TMDL<br />

Development<br />

Projected<br />

Year for<br />

TMDL<br />

Development<br />

Comments 3<br />

(# Exceedances/ # Samples)<br />

PP= Planning Period VP= Verified<br />

Period<br />

5 Low 2008 PP - 32/103 values below DO<br />

criterion. VP - 23/65 values below<br />

DO criterion. DO met verification<br />

threshold <strong>of</strong> IWR and BOD is<br />

causative pollutant. (BOD median =<br />

2.1 mg/L). 103 DO values, median<br />

6.2 mg/L, mean 5.9 mg/L, range 0.5<br />

- 12.09 mg/L.<br />

5 Low 2008 PP - 29/95 values exceed criterion.<br />

VP - 21/61 values exceed criterion.<br />

Coliform median 170<br />

colonies/100ml, range 2 - 4,320<br />

colonies/100ml. No more than 4<br />

values per month.<br />

5 Low 2008 Co-limitation by nitrogen and<br />

phosphorus based on a TN/TP<br />

median <strong>of</strong> 14 (156 values) during<br />

the PP and a median <strong>of</strong> 17 (84<br />

values) during the VP. 84 TN<br />

values, median 1.16 mg/L . 84 TP<br />

values, median 0.08 mg/L. PP - 6<br />

chla annual means exceeded 20<br />

ug/l (1991, 1992, 1994, 1996, 1998,<br />

1999). VP - 3 chla annual means<br />

exceeded 20 ug/l (1996, 1998,<br />

1999). The annual chla<br />

concentrations were: 1991 - 20.5<br />

ug/l, 1992 - 20.7 ug/l, 1993 - 13.6<br />

ug/l, 1994 - 23.2 ug/l, 1996 - 25.1<br />

ug/l, 1997 - 13.0 ug/l, 1998 - 20.0<br />

ug/l, 1999 - 26.6 ug/l, and 2000 -<br />

10.0 ug/l.

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