Parameter

5/16/01

6/13/01

7/18/01

Mean of Three Sampling Events 2001

Mean of Three Sampling Events 2000

Lake Depth at Sampling Location (m)

39.0

30.5

36.3

Depth of Thermocline (m)

--

14.0

15.0

Secchi Disc Depth (m)

> 7.0

> 7.0

6.3

--

5.2

Chlorophyll (mg/l)

--

2

4

3

4

NH₃+NH₄⁺-N (mg/l)

302

146

157

202

164

NH₃-N (un-ionized) (mg/l)

7

3

17

9

14

NO₃+NO₂-N (mg/l)

0.11

0.07

0.13

0.10

0.18

Total Nitrogen (mg/l as N)

0.53

0.27

1.11

0.64

0.75

Total Phosphorus (mg/l as P)

25

77

21

41

108

PO₄-P (mg/l)

--

--

9

--

--

SiO₂-Si (mg/l)

6

1

1

2

10

pH

8.0

8.5

8.4

8.3

8.3

Alkalinity (mg/l)

191

195

197

194

199

Total Suspended Solids (mg/l)

2.8

1.3

1.5

1.9

2.1

Inorganic Suspended Solids (mg/l)

0.8

0.3

0.4

0.5

0.9

Volatile Suspended Solids (mg/l)

2.0

1.0

1.1

1.4

1.2

Analyte

Concentration (mg/l)

Analyte

Concentration (mg/l)

Organophosphate Insecticides:

Polychlorinated Biphenyls:

Terbufos

<0.1

Aroclor 1016

<0.5

Fonofos

<0.1

Aroclor 1221

<0.5

Chlorpyrifos

<0.1

Aroclor 1232

<0.5

Ethoprop

<0.1

Aroclor 1242

<0.5

Phorate

<0.1

Aroclor 1248

<0.5

Carbofuran

<0.1

Aroclor 1254

<0.5

Malathion

<0.1

Aroclor 1260

<0.5

Dimethoate

<0.1

Chlorohydrocarbon Insecticides:

Nitrogen Containing Herbicides:

Aldrin

<0.05

Atrazine

0.14

alpha-BHC

<0.05

Cyanazine

<0.1

beta-BHC

<0.05

Metolachlor

<0.1

delta-BHC

<0.05

Alachlor

<0.1

Lindane (gamma-BHC)

<0.05

Metribuzin

<0.1

DDD

<0.05

Butylate

<0.1

DDE

<0.05

Trifluralin

<0.1

DDT

<0.05

Acetochlor

<0.1

Methoxychlor

<0.05

Desethyl Atrazine

<0.1

Dieldrin

<0.05

Desisopropyl Atrazine

<0.1

Endosulfan I

<0.05

Simazine

<0.1

Endosulfan II

<0.05

Ametryn

<0.1

Endosulfan sulfate

<0.05

EPTC

<0.1

Endrin

<0.05

Prometon

<0.1

Endrin aldehyde

<0.05

Propachlor

<0.1

Endrin ketone

<0.05

Propazine

<0.1

Heptachlor

<0.05

Dimethenamid

<0.1

Heptachlor epoxide

<0.05

Acid Herbicides:

Chlordane

<0.05

2,4-D

<0.2

Toxaphene

<0.5

Silvex

<0.2

Picloram

<0.2

Dicamba

<0.2

Bentazon

<0.2