Open-File Report 99-219 contents page

Table 10. Seasonal (April through October) median values for submersed aquatic vegetation habitat criteria parameters at freshwater tidal Potomac River monitoring station XFB1433 for the period 1983 through 1997
YEAR	SECCHI (m)	TSS (mg/l)	CHLA (mg/l)	DIP (mg/l)	DIN (mg/l)
1983	0.66	18.0	5.56	0.0300	1.8690
1984	0.76	11.0	9.71	0.0200	1.9840
1985	0.85	15.0	16.27	0.0400	1.7940
1986	0.60	15.0	8.37	0.0200	1.7520
1987	0.60	15.0	8.97	0.0300	1.9610
1988	0.60	17.5	8.15	0.0230	2.2200
1989	0.55	16.0	8.67	0.0380	2.0760
1990	0.55	18.0	7.48	0.0280	2.1100
1991	0.70	16.0	9.22	0.0140	2.2600
1992	0.65	17.5	8.22	0.0210	2.1720
1993	0.60	20.0	11.96	0.0140	2.0100
1994	0.60	18.5	20.19	0.0190	1.6230
1995	0.70	25.5	22.18	0.0160	1.6550
1996	0.55	23.0	7.92	0.0215	1.6095
1997	0.50	22.5	28.60	0.0120	1.1480

Table 11. Seasonal (April through October) median values for submersed aquatic vegetation habitat criteria parameters at freshwater tidal Potomac River monitoring station XEA6596 for the period 1983 through 1997
YEAR	SECCHI (m)	TSS (mg/l)	CHLA (mg/l)	DIP (mg/l)	DIN (mg/l)
1983	0.53	24.0	16.68	0.0400	1.6110
1984	0.70	15.5	22.13	0.0200	1.4420
1985	0.61	14.0	24.55	0.0300	1.4200
1986	0.50	16.0	12.86	0.0280	1.3880
1987	0.65	14.5	9.79	0.0290	1.5860
1988	0.65	19.0	14.35	0.0230	1.7760
1989	0.65	12.0	8.01	0.0180	1.9680
1990	0.60	16.0	5.68	0.0280	2.0600
1991	0.80	9.5	5.48	0.0145	1.8520
1992	0.70	15.0	6.98	0.0160	1.7160
1993	0.60	16.5	14.08	0.0175	1.4500
1994	0.60	20.0	21.93	0.0225	1.4715
1995	0.60	23.0	22.13	0.0160	1.1295
1996	0.50	22.5	9.57	0.0200	1.4750
1997	0.45	27.5	23.00	0.0130	1.1155

Table 12 & 13

Open-File Report 99-219 contents page