The Cayuga Lake Defense Fund - Citizen's Guide to Water Quality Hazards Posed by Cornell University's Lake Source Cooling Project - Table One and Figure Five

Table One

TABLE 2.2.3-14

NYSDEC TROPHIC STATUS INDICATOR PARAMETERS MEASURED AT STATIONS P2, P4 AND S11, 1994-1996



STATION


YEAR
SUMMER (JUNE 1 - AUGUST 31) AVERAGE
TOTAL P(1)
(µg/l)
CHLOROPHYLL a(2)
(µg/l)
SECCHI DISK
TRANSPARENCY(M)
DEEP
P4 199422.4 4.1 2.1
S11 1995 16.3 4.8 2.2
S11 1996 13.2 3.4 2.5
SHALLOW
P2 199430.8 8.91.5
P2 1995 23.7 6.8 1.7
P2 1996 25.7 7.61.9

Calculations use one-half the laboratory limit of detection when observations are below that level.

(1) phosphorus values are averages of 0 and 10 m data at P4 or S11 and 0 and 4 m data at P2.
(2) Chlorophyll a measured as a a composite sample from 0 to 10 m at S11 or P4 and 0 to 4 m at P2.

P phosphorus
µg/l Micrograms per liter
M Meters

Figure Five

[From Chapter 2, page 2.3.3-21, paragraph 2.3.3.3.2.1 of the Environmental Impact Statement]

"Projected compliance with the NYS phosphorus guidance value provides one scale by which the potential LSC impacts can be assessed. Data from Station P4 or S11 [emphasis added] in the mid-southern lake basin were used to evaluate how Cayuga Lake water compares to the state TP [total phosphorus] guidance value under current conditions (Table 2.3.3-14). These data indicate that southern Cayuga Lake currently meets [emphasis added] the ambient water quality guidance value for TP in ponded waters, since the summer average concentration is consistently below 20 µg/l. Since the maximum concentration of TP in the circulated hypolimnetic water is at or below the guidance value (20 µg/l), we conclude that implementation of the LSC project would not cause exceedances of the guidance value in the southern basin."

The summer average phosphorus concentration shown in Table 2.3.3-14 is clearly not less than 20 micrograms/liter.


Prepared by the
Cayuga Lake Defense Fund (CLDF).
For more information, Call: 275-9054 or 272-7914 or email info@cldf.org

CLDF 1998