# 2 Caloosahatchee Monitoring Project Report

January 2007

Introduction

All the analytical work was performed by the Florida Department of Environmental

Protection (FDEP) Central Laboratory in Tallah assee, Florida. Analytical method details

can be found at the following location: http://www.dep.state.fl.us/labs/cgibin/sop/chemsop.asp

.

To evaluate the potential impacts on aquatic lif e, the observed concentration is compared

to the appropriate criterion outlined in Florida Administrative Code (FAC) 62-302.530.

If a pesticide compound is not specifically li sted, acute and chronic toxicity criteria are

calculated as one-third and one -twentieth, respectiv ely, of the amount lethal to 50% of

the test organisms in 96 hour, usi ng the lowest technical grade EC 50 

# or LC 50 

# reported in

the summarized literature for the specie significant to the indigenous aquatic community

(FAC 62-302.200). Each pesticide’s descri ption and possible uses and sites of

application described herein are taken fr om Hartley and Kidd (1987). This summary

covers samples collected during 2006. One hundred and seven samples were analyzed

from nine sites.

Pesticides

Results

The concentrations of the pesticides detect ed at each of the sites (Figure 1), are

summarized for the surface water in Table 1. The detected concentration of aldicarb

could cause impacts to the macroinvertebrate and selected fish populations. With the

exception of aldicarb, the detected concentra tions were similar to the historical South

Florida Water Management District data co llected at the Townsend Canal (SR80 bridge)

(Table 2), upstream of S79 (Table 3), and S78 (Table 4). Carbamate analysis is not part

of the Districts current monitoring program. Previous analytic al protocols resulted in a

significantly higher minimum detection limit. Th e revised analytical method used in this

program has an order of magnitude lower detection limit.

Usage and Water Quality Impacts

2,4-D 2,4-D is a selective systemic herbicide used for the post-emergence control of

annual and perennial broad leaf weeds in terrestrial (grassland, established turf,

sugarcane, rice, and on non-crop areas) as well as aquatic areas. Environmental fate and

toxicity data in Tables 5 and 6 indicate that 2,4-D (1) has minimum loss from soil by

surface adsorption, with a moderate loss by leach ing and surface solution; (2) is slightly

toxic to mammals and relatively non-toxic to fish; and (3) does not bioaccumulate

significantly. 2,4-D was only detected four times, twice at 833-Whidden and once at

both Crawford and Townsend Canals. The highest 2,4-D concentr ation detected (19

micrograms per liter [ μ g/L] at Crawford Canal) should not have an acute impact on fish

or aquatic invertebrates.

# 3 Aldicarb : Aldicarb is a restricted use systemic insecticide registered for use on citrus,

potatoes, and sugarcane. Envir onmental fate and toxicity data in Tables 5 and 6 indicate

that aldicarb (1) has minimum loss from soil by surface adsorption, with a moderate loss

by surface solution and is easily lost from so il by leaching; (2) is toxic to mammals and

relatively toxic to fish; and (3) does not bioaccumulate sign ificantly. The only aldicarb

concentration detected (5.0 μg/L at 833-Whidde n) is greater than the calculated chronic

toxicity for the water flea ( Daphnia magna ) and bluegill ( Lepomis macrochirus ). At this

level, long term exposure can cause impacts to macroinvertebrate and selected fish

populations. However, the pulsed nature of ag ricultural runoff releases to the drainage

system precludes drawing any conclusions a bout the effects of long-term exposures.

Ametryn : Ametryn is a selective terrestrial he rbicide registered for use on sugarcane,

bananas, pineapple, citrus, corn, and non-crop areas. Mo st algal effects occur at

concentrations > 10 μ g/L (Verschueren, 1983). Environmenta l fate and toxicity data in

Tables 5 and 6 indicate that ametryn (1) is lost from soil relatively easily by leaching,

surface adsorption, and in surface solution; (2 ) is relatively non-toxic to mammals and

fish; and (3) does not bioconcentrate significantly. Additional fish toxicity datum

includes a 96-hour LC 50 

# of 14.1 milligrams per liter (m g/L) for goldfish (Hartley and

Kidd, 1987). Ametryn was detected 16 times, with the majority of detections occurring

at the C-19 Canal site. The highest amet ryn surface water concentration found was 0.040

μ g/L (C-19 Canal). Using these criteria, th ese observed surface water levels should not

have an acute or chronic effect on fish or aquatic invertebrates.

Atrazine : Atrazine is a selective systemic herbicide registered for use on pineapple,

sugarcane, corn, rangelands, ornamental turf and lawn grasses, and non-crop areas.

Environmental fate and toxicity data in Tables 5 and 6 indicat e that atrazine (1) is easily

lost from soil by leaching and in surface solution, with moderate loss from surface

adsorption; (2) is relatively non-toxic to mammals and fish; and (3) does not

bioconcentrate significantly. Additional fi sh toxicity data include a 96-hour LC 50 

# of 76

mg/L for carp, 16 mg/L for perch and 4.3 mg /L for guppies (Hartley and Kidd, 1987).

Also, in a flow-through bioassay, the ma ximum acceptable toxicant concentration

(MATC) of atrazine was 90 and 210 μ g/L for bluegill and fathead minnow (Verschueren,

1983). The draft ambient aquatic life water quality criterion identif y a one-hour average

concentration not to exceed 1,500 μ g/L more than once every three years on the average

(USEPA, 2003). Atrazine was detected in al l but six samples. The highest atrazine

surface water concentrations found was 1.9 μ g/L (C-3 Canal). Using these criteria, these

observed surface water levels should not have an acute or chronic detrimental impact on

fish or invertebrates.

Bromacil : Bromacil is a terrestrial herbicide regi stered for use on pineapple, citrus, and

non-crop areas. Environmental fate and toxic ity data in Tables 5 and 6 indicate that

bromacil (1) is easily lost from soil by leaching, with moderate loss from surface

adsorption or surface solution; (2) is relativ ely non-toxic to mammals and fish; and (3)

does not bioconcentrate significantly. Additi onal fish toxicity datum includes a 96-hour

LC 50 

# of 164 mg/L for carp (Hartley and Kidd, 1987). Bromacil was detected 41 times.

# 4 The highest concentration of bromacil detected in the surface water was 6.1 μ g/L

(Townsend Canal). Using these criteria, thes e observed levels should not have an acute

or chronic detrimental impact on fish.

Diuron: Diuron is a selective, systemic terre strial herbicide re gistered for use on

sugarcane, bananas, and citrus. Environmenta l fate and toxicity data in Tables 5 and 6

indicate that diuron (1) is easily lost from soil in surface solution, with moderate loss

from leaching or surface adsorption; (2) is relatively non-toxic to mammals and fish; and

(3) does not bioconcentrate signi ficantly. Additional fish toxicity datum includes a 96-

hour LC 50 

# of 25 mg/L for guppies (Hartley and Ki dd, 1987). Crustaceans are affected at

lower concentrations with a 48-hour LC 50 

# of 1.4 mg/L for water fleas and a 96-hour LC 50 

# of 0.7 mg/L for water shrimp (Verschuere n, 1983). Most algal effects occur at

concentrations > 10 μ g/L (Verschueren, 1983). Diuron wa s detected six times. The

highest surface water concentr ation of diuron found was 0.40 μ g/L (Crawford Canal and

833-Whidden Canal). Using these criteria, this level should not have an acute, harmful

impact on fish or aquatic invertebrates.

Hexazinone : Hexazinone is a non-selective co ntact herbicide that inhibits

photosynthesis. Registered uses include s ugarcane, pineapple, and non-crop areas.

Environmental fate and toxicity data in Tables 5 and 6 i ndicate that hexazinone (1) is

easily lost from soil by leaching, with modera te loss from surface adsorption or surface

solution; (2) is relatively non-toxic to mammals and fish; and (3) does not bioconcentrate

significantly. Hexazinone is practically non-to xic to freshwater invertebrates with an

EC 50 

# of 145 mg/L for Daphnia magna (USEPA, 1988). Hexazinone was detected 79

times. The highest surface water concentration detected (0.19 μ g/L at C-19 Canal)

should not have an acute impact on fish or aquatic invertebrates.

Metalaxyl : Metalaxyl is a systemic fungicide. Registered uses include potatoes,

strawberries, citrus, avocados and vegetables. Environmental fate and toxicity data in

Tables 5 and 6 indicate that metalaxyl (1) is easily lost from soil by leaching and has a

moderate potential for loss due to surface adso rption and surface solution; (2) is relatively

non-toxic to mammals and fish; and (3) does not bioaccumulate significantly. The only

concentration of metalaxyl detected was 0.089 μg/L (Crawf ord Canal). Using these

criteria, the concentrations of metalaxyl detected should not have an acute, harmful

impact on fish or aquatic invertebrates.

Metolachlor : Metolachlor is a selective herbicide used on potatoes, sugarcane, and some

vegetables. Environmental fa te and toxicity data in Ta bles 5 and 6 indicate that

metolachlor (1) has a large potential for lo ss due to leaching and a medium potential for

loss in surface solution and due to surface adso rption; (2) is relatively non-toxic to

mammals and fish; and (3) does not bioconcen trate significantly. Metolachlor is nontoxic to birds (Lyman et al., 1990). Metol achlor was only detected five times. The

highest surface water concentration found (0.2 μ g/L at C-3 Canal) is over two orders of

magnitude below the calculated chronic toxicity level. Using these criteria, this observed

level should not have a harmful impact on fish or aquatic invertebrates.

# 5 Norflurazon : Norflurazon is a selective herbic ide registered for use on many crops

including citrus. Environmental fate and toxi city data in Tables 5 and 6 indicate that

norflurazon (1) is easily lost from soil surf ace solution and a moderate potential for loss

due to leaching and surface adso rption; (2) is relatively non-toxic to mammals and fish;

and (3) does not bioconcentrate significantly. The LC 50 

# for norflurazon is >200 mg/L for

catfish and goldfish (Hartley and Kidd, 1987). The concentrations of the 75 norflurazon

surface water detections ranged from 0.023 to 4.3 μ g/L. Even at the highest

concentration, this is over several orders of magnitude below the calculated chronic

toxicity level. Using these criteria, thes e observed levels should not have an acute,

detrimental impact on fish or aquatic invertebrates.

Simazine : Simazine is a selective systemic he rbicide registered for use on many crops

including sugarcane, citrus, corn, and non-cr op areas. Environmenta l fate and toxicity

data in Tables 5 and 6 indicate that simazine (1) is easily lost from soil by leaching and

has a moderate potential for loss due to su rface adsorption and surface solution; (2) is

relatively non-toxic to mammals and fish; a nd (3) does not bioconcentrate significantly.

Additional fish toxicity datum includes a 96-hour LC 50 

# of 49 mg/L for guppies (Hartley

and Kidd, 1987). Most of the aquatic biologi cal effects occur at concentrations > 500

μ g/L (Verschueren, 1983). Aquatic invertebrate LC 50 

# toxicity ranges from 3.2 mg/L to

100 mg/L for simazine (USEPA, 1984). Simazine was detect ed 76 times. The highest

surface water concentration of simazine detected (3.8 μ g/L at Townsend Canal) was

below any level of concern for fi sh or aquatic invertebrates.Figure 1. Pesticide and Metal Monitoring Sites.6sample number typestarttime start dateendtime end dateSiteametrynmetalaxylNumber ofpesticidesdetected atsiteClass III drainage basin: sugarcane and citrusP020206-1 G 10:15 2/2/2006 N/A N/A 833-Whidden- - -- 0.12 0.016 I -- - 0.024 I --0.029 I -4P030206-2 G 10:25 3/2/2006 N/A N/A 833-Whidden- - -- 0.38 0.028 I -- - 0.031 I --0.05 I 0.125P033006-4 G 12:15 3/30/2006 N/A N/A 833-Whidden0.65 5.0 1.6-1.8 0.074 0.024 I 0.12 I 0.40 I 0.029 I --0.98 0.035 I 11P042706-5 G 12:55 4/27/2006 N/A N/A 833-Whidden- - -- 0.20 0.027 I -- - 0.024 I --- 0.018 I 4P052506-1 G 10:00 5/25/2006 N/A N/A 833-Whidden- - -- 0.23 0.072-- ----- 0.014 I 3P062206-1 G ? 6/22/2006 N/A N/A 833-Whidden- - -- 0.17 0.030 I -- - 0.022 I --- 0.015 I 4P072706-1 G 10:20 7/27/2006 N/A N/A 833-Whidden- - - 0.016 I 0.038 I 0.014 I -0.15 I - 0.025 I --0.46 0.017 I 7P091406-2 G 9:20 9/13/2006 N/A N/A 833-Whidden0.22 I - -- 0.024 I --0.91 - 0.021 I --0.50-5P100206-1 G 10:30 10/2/2006 N/A N/A 833-Whidden- - - 0.033 I 0.040 --- - 0.22----3P110206-1 G 10:10 11/2/2006 N/A N/A 833-Whidden- - -- 0.071 --- - 0.036 I --0.063 I -3Class III drainage basin: sugarcaneP013006-3 AS 12:00 1/30/2006 12:03 1/31/2006 C-19 canal- - -- 0.21 0.015 I -- - 0.031 I --0.043 I 0.017 I 5P022806-3 AS 11:35 2/27/2006 10:35 2/28/2006 C-19 canal- - -- 0.38 0.031 I -- - 0.019 I --0.026 I 0.0675P030106-6 AS 11:06 2/28/2006 10:06 3/1/2006 C-19 canal- - -- 0.29 0.027 I -- - 0.019 I --- 0.038 I 4P032806-3 AS 11:30 3/27/2006 12:55 3/28/2006 C-19 canal- - --1.5 0.11 0.020 I - - 0.030 I -0.088 I 0.031 I 0.0577P042606-3 AS 10:30 4/25/2006 9:30 4/26/2006 C-19 canal- - -- 0.72 0.053-- - 0.025 I --- 0.023 I 4P042706-4 AS 10:40 4/26/2006 9:40 4/27/2006 C-19 canal- - --1.5 0.053 0.011 I - - 0.023 I --- 0.023 I 5P052306-5 AS 10:00 5/22/2006 9:00 5/23/2006 C-19 canal- - -- 0.26 0.051-- - 0.016 I --- 0.013 I 4P052406-4 AS 11:45 5/23/2006 10:45 5/24/2006 C-19 canal- - -- 0.30 0.039 I -- - 0.015 I --- 0.011 I 4P062006-3 AS 9:26 6/19/2006 8:26 6/20/2006 C-19 canal- - - 0.023 I 0.43 0.086 0.019 I - - 0.025 I --- 0.012 I 6P062106-3 AS 10:30 6/20/2006 9:30 6/21/2006 C-19 canal- - - 0.017 I 0.32 0.076-- - 0.032 I ----4P072506-3 AS 11:15 7/24/2006 11:20 7/25/2006 C-19 canal- - - 0.040 I 0.33 0.028 I -- - 0.11----4P072606-3 AS 11:20 7/25/2006 10:37 7/26/2006 C-19 canal- - - 0.036 I 0.31 0.028 I -- - 0.19----4SD091206-3 AS 10:55 9/12/2006 ? ? C-19 canal- - - 0.019 I 0.074 --- ------2P091306-5 AS 11:15 9/12/2006 11:45 9/13/2006 C-19 canal- - - 0.026 I 0.075 --- - 0.016 I ----3P092606-3 AS 10:50 9/25/2006 10:15 9/26/2006 C-19 canal- - - 0.026 I - --- - 0.030 I2P092706-3 AS 10:23 9/26/2006 9:23 9/27/2006 C-19 canal- - - 0.025 I 0.15 0.013 I -- - 0.029 I4P103106-3 AS 9:51 10/30/2006 10:13 10/31/2006 C-19 canal- - -- 0.090 0.012 I -- - 0.039 I --0.024 I -4P110106-3 AS 10:12 10/31/2006 9:12 11/1/2006 C-19 canal- - -- 0.084 0.016 I -- - 0.034 I --0.022 I -4P022706- blank BDL 11:30 2/27/2006 N/A N/A C-19 Canal EB- - --- --- ------0P052406-5 BDL 11:20 5/23/2006 N/A N/A FIELD BLANK- - --- --- ------0P062106-4 BDL 12:40 6/21/2006 N/A N/A EQUIPMENT BLANK - - --- --- ------0P091306-2 BDL 9:00 9/12/2006 N/A N/A FIELD BLANK- - --- --- ------0P092606-4 BDL 10:05 9/26/2006 N/A N/A EQUIPMENT BLANK - - --- --- ------0P110106-4 BDL 10:30 11/1/2006 N/A N/A FIELD BLANK- - --- --- ------0Class III drainage basin: citrus, field crops, and pasturelandP013006-4 G 13:10 1/30/2006 N/A N/A C-3 Canal- - -- 0.15 0.014 I -- - 0.032 I --0.047 I 0.016 I 5P030106-5 G 10:15 3/1/2006 N/A N/A C-3 Canal- - --1.9 0.081 0.014 I 0.089 I - 0.017 I -0.2 I 0.08 0.048P032806-6 G 11:30 3/28/2006 N/A N/A C-3 Canal- - -- 0.20 0.027 I -- - 0.032 I --0.030 I 0.032 I 5P052306-4 G 10:30 5/23/2006 N/A N/A C-3 Canal- - -- 0.23 0.033 I -- - 0.016 I --- 0.012 I 4P062006-4 G 11:12 6/20/2006 N/A N/A C-3 Canal- - -- 0.17 0.036 I -- - 0.022 I --- 0.011 I 4P072606-5 G 13:01 7/26/2006 N/A N/A C-3 Canal- - - 0.013 I 0.13 0.025 I -- - 0.013 I -0.098 I 0.027 I -6P091306-4 G ? 9/12/2006 N/A N/A C-3 Canal- - - 0.010 I 0.43 0.031 I -0.76 ----0.033 I -5P092606-5 G 11:03 9/26/2006 N/A N/A C-3 Canal- - -- 0.31 0.018 I -- ------2P103106-4 G 10:47 10/31/2006 N/A N/A C-3 Canal- - - 0.012 I 0.054 --0.082 I - 0.096--0.091 -5Class IIIP030206-3 G 12:10 3/2/2006 N/A N/A C43-site 2- - -- 0.40 0.03 I -0.04 I - 0.03 I --0.05 I 0.116P033006-3 G 10:45 3/30/2006 N/A N/A C43-site 2- - -- 0.23 0.024 I -- - 0.021 I --0.039 I 0.0455P042706-3 G 10:50 4/27/2006 N/A N/A C43-site 2- - -- 0.20 0.030 I -- - 0.025 I --- 0.018 I 4P052506-2 G 11:45 5/23/2006 N/A N/A C43-site 2- - -- 0.19 0.058-- - 0.017 I --- 0.013 I 4P062206-2 G ? 6/22/2006 N/A N/A C43-site 2- - -- 0.31 0.037 I -- - 0.024 I --0.030 I 0.014 I 5P072706-2 G 12:13 7/27/2006 N/A N/A C43-site 2- - - 0.017 I 0.12 0.020 I -0.095 I - 0.021 I --0.17-6P100206-2 G 12:00 10/2/2006 N/A N/A C43-site 2- - -- 0.051 --- - 0.067 I --0.10-3P110206-2 G 11:46 11/2/2006 N/A N/A C43-site 2- - -- 0.028 I --0.10 I - 0.062 I ----3G grabAS autosamplerN/A not applicable- denotes that the result is below the method detection limit (MDL)I value reported is less than the minimum quantitation limit, and greater than or equal to the minimum detection limit270 ml per hour for 24 hoursatrazinedesisopropyl bromacilnorflurazon simazinealdicarbsulfoxideTable 1. Summary of analytes (μg/L) above the method detection limit found in suface water samples.hexazinonemetolachlor2,4-Ddiuronatrazineatrazinedesethylaldicarb7sample number typestarttime start dateendtime end dateSiteametrynmetalaxylNumber ofpesticidesdetected atsiteClass IP030206-4 G 13:21 3/2/2006 N/A N/A C43-site 4- - -- 0.52 0.031 I -0.046 I - 0.022 I -0.073 I - 0.0686P033006-1 G 9:30 3/30/2006 N/A N/A C43-site 4- - -- 0.25 0.027 I -- - 0.019 I --0.10 0.0635P042706-1 G 9:11 4/27/2006 N/A N/A C43-site 4- - -- 0.19 0.028 I -- - 0.031 I --- 0.021 I 4P052506-3 G 12:58 5/25/2006 N/A N/A C43-site 4- - -- 0.20 --- - 0.016 I ----2P062206-4 G ? 6/22/2006 N/A N/A C43-site 4- - -- 0.30 0.035 I -0.052 I - 0.024 I --0.10 0.033 I 6P0727706-4 G 13:17 7/27/2006 N/A N/A C43-site 4- - - 0.013 I 0.099 0.018 I 0.013 I 0.56 - 0.017 I --0.49 0.208P100206-3 G 13:00 10/2/2006 N/A N/A C43-site 4- - -- 0.039 --0.14 I - 0.020 I --0.21 0.031 I 5P103106-4 G 13:17 11/2/2006 N/A N/A C43-site 4- - -- 0.025 I --0.090 I - 0.022 I --0.27 0.023 I 5Class IP030206-5 G 13:50 3/2/2006 N/A N/A C43-site 5- - -- 0.56 0.037 I -0.048 I - 0.027 I -0.068 I 0.089 0.0517P033006-2 G 9:45 3/30/2006 N/A N/A C43-site 5- - -- 0.35 0.031 I -- - 0.023 I --0.10 0.115P042706-2 G 9:38 4/27/2006 N/A N/A C43-site 5- - -- 0.22 0.031 I -- - 0.030 I --0.035 I 0.026 I 5P052506-4 G 13:15 5/25/2006 N/A N/A C43-site 5- - -- 0.19 0.052-- - 0.017 I --0.079 I 0.021 I 5P062206-3 G ? 6/22/2006 N/A N/A C43-site 5- - -- 0.21 0.033 I -0.088 - 0.020 I --0.15 0.0426P072706-3 G 12:58 7/27/2006 N/A N/A C43-site 5- - -- 0.084 0.019 I 0.021 I 0.91 0.20 I 0.014 I --0.89 0.598P100206-4 G 13:20 10/2/2006 N/A N/A C43-site 5- - -- 0.040 --0.15 I ----0.22 0.024 I 4P110206-3 G 12:55 11/2/2006 N/A N/A C43-site 5- - -- 0.030 I --0.076 I ----0.20 0.019 I 4Class III drainage basin: citrus, field crops, and pasturelandP013006-5 G 14:20 1/30/2006 N/A N/A Crawford Canal - - -- 0.062 0.011 I -0.089 I - 0.017 I --0.44 0.012 I 6P022806-4 G ? 2/28/2006 N/A N/A Crawford Canal - - -- 0.54 0.04-0.083 I - 0.018 I --0.44 0.0646P032806-5 G 10:40 3/28/2006 N/A N/A Crawford Canal - - -- 0.20 0.027 I -0.80 0.27 I 0.017 I --0.89 0.0637P052306-3 G 9:50 5/23/2006 N/A N/A Crawford Canal - - -- 0.19 0.051 0.052 1.3 0.40 I ---1.3 0.487P052406-3 G 10:10 5/??/06 N/A N/A Crawford Canal-metals onlyP062006-5 G 11:45 6/20/2006 N/A N/A Crawford Canal 19 - -- 0.12 0.026 I 0.022 I 0.25 --0.089 I -0.97 0.0728P072606-4 G 12:24 7/26/2006 N/A N/A Crawford Canal - - --- --0.87 ----1.0-2SD091206-3 G 12:30 9/12/2006 N/A N/A Crawford Canal - - --- --0.68 - 0.023 I --1.3-3P092706-4 G 9:10 9/27/2006 N/A N/A Crawford Canal - - -- 0.036 I --- ----0.79 0.038 I 3P103106-5 G 11:49 10/31/2006 N/A N/A Crawford Canal - - -- 0.036 I --- ----0.25 0.016 I 3Class III drainage basin: residentialP013006-2 AS 9:50 1/30/2006 9:53 1/31/2006 Hickey Creek- - -- 0.026 I --- ----0.033 I -2P013106-2 AS 10:50 1/31/2006 9:52 2/1/2006 Hickey Creek- - -- 0.026 I --- ----0.039 I -2P022806-2 AS 9:40 2/27/2006 8:40 2/28/2006 Hickey Creek- - -- 0.16 0.015 I -- ------2P030106-4 AS 9:30 2/28/2006 8:30 3/1/2006 Hickey Creek- - -- 0.29 0.02 I -- - 0.012 I --0.032 I 0.017 I 5P032806-1 AS 9:35 3/27/2006 8:50 3/28/2006 Hickey Creek- - -- 0.28 0.027 I -- - 0.020 I --0.077 I 0.0865P032906-1 AS 9:10 3/28/2006 9:00 3/29/2006 Hickey Creek- - -- 0.25 0.023 I -- - 0.015 I --0.061 I 0.0735P042606-1 AS 8:41 4/25/2006 7:41 4/26/2006 Hickey Creek- - -- 0.17 0.021 I -- - 0.014 I --0.023 I 0.015 I 5P052306-1 AS 8:20 5/22/2006 7:20 5/23/2006 Hickey Creek- - -- 0.17 0.024 I -0.23 - 0.015 I --0.19 0.0436P052406-1 AS 8:45 5/23/2006 7:45 5/24/2006 Hickey Creek- - -- 0.12 0.020 I -0.14 I ----0.10 0.024 I 5P062006-1 AS 9:26 6/19/2006 8:26 6/20/2006 Hickey Creek- - -- 0.14 0.032 I 0.011 I 0.075 I - 0.014 I --0.11 0.033 I 7P062106-1 AS 8:40 6/20/2006 7:40 6/21/2006 Hickey Creek- - -- 0.16 0.042 I -- - 0.014 I --0.12 0.039 I 5P072506-1 AS 9:15 7/24/2006 8:29 7/25/2006 Hickey Creek- - --- --- ------0P072606-1 AS 8:30 7/25/2006 8:47 7/26/2006 Hickey Creek- - -- 0.019 I --- ------1SD091206-1 AS 8:45 9/11/2006 8:45 9/12/2006 Hickey Creek- - -- 0.018 I --- ------1P091306-1 AS 9:00 9/12/2006 8:30 9/13/2006 Hickey Creek- - --- --- ------0P092606-1 AS 8:40 9/25/2006 8:10 9/26/2006 Hickey Creek- - --- --- ------0P103106-1 AS 8:05 10/30/2006 8:05 10/31/2006 Hickey Creek- - -- 0.023 I --- ----0.14 0.017 I 3P110106-1 AS 8:22 10/31/2006 7:22 11/1/2006 Hickey Creek- - -- 0.017 I --- ----0.11 0.014 I 3Class III drainage basin: citrusP013006-1 AS 8:51 1/30/2006 8:53 1/31/2006 Townsend Canal - - -- 0.092 --- ----0.15 0.016 I 3013106-1 AS 10:00 1/31/2006 9:02 2/1/2006 Townsend Canal - - -- 0.082 0.017-- - 0.021 I --0.14 0.014 I 5P030106-3 AS 8:53 2/28/2006 7:53 3/1/2006 Townsend Canal - - -- 0.52 0.036 I -0.051 I - 0.027 I --0.089 0.0716P030206-1 AS 9:00 3/1/2006 8:00 3/2/2006 Townsend Canal - - -- 0.52 0.038 I -0.046 I - 0.023 I --0.097 0.0746P032806-2 AS 10:15 3/27/2006 10:10 3/28/2006 Townsend Canal - - -- 0.23 0.032 I -- - 0.020 I --0.33 0.0675P032906-2 AS 10:18 3/28/2006 9:40 3/29/2006 Townsend Canal - - -- 0.23 0.028 I -- - 0.020 I --0.097 0.0575P042606-2 AS 9:37 4/25/2006 8:37 4/26/2006 Townsend Canal - - -- 0.18 0.024 I -- - 0.035 I --0.040 I 0.018 I 5P052306-2 AS 8:50 5/22/2006 7:50 5/23/2006 Townsend Canal - - -- 0.20 0.028 I -0.096 I - 0.017 I --0.057 I 0.034 I 6P052406-2 AS 9:30 5/23/2006 8:30 5/24/2006 Townsend Canal - - -- 0.21 0.029 I -0.073 I - 0.015 I --0.044 I 0.025 I 6P062006-2 AS 9:55 6/19/2006 8:55 6/20/2006 Townsend Canal - - -- 0.25 0.041 I -- - 0.019 I --0.10 0.026 I 5P062106-2 AS 9:15 6/20/2006 8:15 6/21/2006 Townsend Canal 0.86 - -- 0.31 0.068-- - 0.019 I --0.090 0.026 I 6P072506-2 AS 10:00 7/24/2006 9:20 7/25/2006 Townsend Canal - - -- 0.056 0.022 I 0.16 6.1 0.29 I ---4.3 3.87P072606-2 AS 9:21 7/25/2006 9:23 7/26/2006 Townsend Canal - - -- 0.044 0.025 I 0.11 5.1 0.25 I ---3.5 2.37P091306-3 AS 9:43 9/12/2006 9:00 9/13/2006 Townsend Canal - - -- 0.068 --0.78 ----0.73 0.0524P091406-1 AS 9:20 9/13/2006 8:20 9/14/2006 Townsend Canal - - -- 0.080 --1.10.91 0.0434P092606-2 AS 9:15 9/25/2006 8:47 9/26/2006 Townsend Canal - - -- 0.038 I --0.52 ----0.51 0.039 I 4P092706-2 AS 9:00 9/26/2006 8:00 9/27/2006 Townsend Canal - - - 0.011 I 0.040 I --0.27 - 0.022 I --0.25 0.031 I 6P103106-2 AS 8:36 10/30/2006 8:49 10/31/2006 Townsend Canal - - -- 0.029 I --0.12 I - 0.031 I --0.25 0.017 I 5P110106-2 AS 8:57 10/31/2006 7:57 11/1/2006 Townsend Canal - - -- 0.028 I --0.11 I - 0.032 I --0.25 0.015 I 5G grabAS autosamplerN/A not applicable- denotes that the result is below the method detection limit (MDL)I value reported is less than the minimum quantitation limit, and greater than or equal to the minimum detection limit270 ml per hour for 24 hourssimazineTable 1. (cont.) Summary of analytes (μg/L) above the method detection limit found in suface water samples.2,4-D aldicarbaldicarbsulfoxideatrazineatrazinedesethylatrazinedesisopropylhexazinonemetolachlor norflurazonbromacil diuron8

# flow ametryn atrazine DEA DIA bromacil diuron ethion hexazinone metalaxyl metribuzin metolachlor norflurazon simazine 2,4-D



# 7/25/2006 Y - 0.051 0.017 I 0.13 6.1 0.43 I -

- - - - 3.8 3.0

-



# 5/17/2006 Y - 0.20 0.029 I - 1.9 0.60 - 0.017 I -

- - 1.5 0.039 -



# 1/31/2006 R - 0.088 0.011 I -

- - - 0.023 I -

- - 0.15 0.016 I -



# 12/14/2005 R

- - - - - -- - - - - - - -



# 8/18/2005 Y - 0.016 I -

- 1.4 - -

- - - - 1.2 0.069 -



# 5/25/2005 R - 0.19 0.023 I -

- - - 0.027 I -

- - 0.024 I 0.010 I -



# 2/23/2005 R - 0.1 0.017 I -

- - - 0.030 I -

- - 0.075 I -

-



# 12/1/2004 R - 0.077 0.013 I -

- - - 0.039 I -

- - 0.064 I -

-



# 7/22/2004 N 0.011 I 0.18 0.038 0.11 3.1 0.94 -

- - - - 1.5 4.3 2.5



# 4/13/2004 Y - 0.31 0.037 I - 0.12 0.50 I - 0.020 I -

- - 0.32 0.069 -



# 1/14/2004 N - 0.35 0.039

- - - - 0.022 I -

- 0.011 I 0.087 0.026 I -



# 10/22/2003 R - 0.095 0.017 I 0.011 I 0.040 I - - 0.032 I -

- - 0.072 I 0.015 I -



# 7/23/2003 N - 0.076 0.015 I -

- - - - - - - 0.16 0.084 -



# 5/14/2003 R 0.012 I 0.86 0.056 0.017 I 0.068 I - -

- - - - 0.13 0.068 -



# 3/13/2003 N - 0.15 0.017 I 0.077 I -

- - - - - - 0.17 0.039 -



# 11/19/2002 Y

- 12 1.0

- 2.8 0.56 -

- - - - 0.74 7.3

-



# 9/18/2002 N - 0.090 0.021 I 0.015 I - 0.42 -

- 0.090 I -

- 0.66 0.060 -



# 6/5/2002 R - 0.22 0.057 0.020 I 0.15 I - -

- - - - 0.094 0.078 -



# 2/5/2002 N 0.026 I 0.32 0.021 I 0.012 I 0.21 - - 0.020 I -

- - 0.23 0.059 -



# 12/18/2001 R 0.019 I 0.31 0.020 I 0.025 I 0.71 0.30 I -

- - - - 0.46 0.30 -



# 8/15/2001 Y

- - - 0.042 -

- - - - - - 0.49 0.88 -



# 5/22/2001 Y 0.018 I 0.41 0.054 0.026 I 0.28 - -

- - - - 0.18 0.26 -



# 3/20/2001 N - 0.11 0.019 I - 0.36 0.39 I -

- - - - 0.28 0.49 -



# 11/15/2000 Y - 0.092 -

- 1.5 - -

- - - - 0.49 0.11 -

8/9/2000 Y - 1.1 0.044 I 0.041 I 3.6 - -

- - - 1.2 0.84 0.51 -

5/3/2000 Y - 0.34 0.047 I -

- - - - - - - - 0.03 I -

2/10/2000 N - 0.080 0.015 I - 0.16 I - -

- - - - 0.17 0.14 -

11/16/1999 Y - 0.07 0.013 I - 0.11 I - -

- - - - 0.03 I -

-

8/9/1999 N 0.05 0.051 n/a n/a 0.68 - -

- 0.1 I -

- 0.36 0.021 I -

4/26/1999 R 0.016 I 0.33 n/a n/a

- - - - - - - 0.053 I -

-

1/11/1999 N 0.013 I 0.51 n/a n/a 0.17 I - - - -

- - 0.42 0.099 -

12/14/1998 Y - 0.47 n/a n/a

- - - - - - - 0.40 0.089 I -

10/1/1998 Y - 0.066 n/a n/a 0.44 - -

- - - - 0.57 0.050 I -

6/18/1998 R

- 0.12 n/a n/a 0.37 0.44 I

-- - - - 0.42 0.16 -

3/3/1998 Y - 0.17 n/a n/a 1.8 - -

- - 0.056 I

- 0.44 0.087 I -

11/20/1997 Y

- 0.056 n/a n/a 0.59

-- - - - - 0.33 0.039 I -

8/18/1997 Y 0.017 I 0.071 n/a n/a 1.5 0.48 I -

- - - - 1.7 0.033 I -

5/12/1997 Y 0.011 I 0.60 n/a n/a 0.37 - -

- - - 0.15 I 0.50 0.044 I -

2/24/1997 R 0.064 0.39 n/a n/a

- - - - - - - 0.053

- -

10/14/1996 N - 0.070 n/a n/a 2.1 - -

- - - - 1.3 0.21 -

7/22/1996 R 0.016 0.085 n/a n/a

- - - 0.021

- - 0.070 0.42 0.088 -

4/15/1996 R 0.082 2.3 n/a n/a 0.12 - - 0.034

- - - 0.13 0.032 -

1/22/1996 N 0.038 0.23 n/a n/a 0.10 - -

- - - - 0.10

- -

10/9/1995 Y - 0.021 n/a n/a 6.4 - -

- - - - 3.7 0.45 -

8/7/1995 - 0.01 n/a n/a 1.4 - -

- - - - 0.27

- -

6/5/1995 0.011 1.6 n/a n/a 6.3 2.7 0.035 2 0.024

- - - 3.9 1

-

3/27/1995 0.02 0.29 n/a n/a 0.1 - - 0.052

- - - 0.081

- -

12/5/1994 R -

- n/a n/a

- - - - - - - - - -

9/26/1994 - -

- n/a n/a 7

- - n/a

- - - n/a N 2.5

-

7/25/1994 Y - 2.3 n/a n/a 3.6 0.56 I - n/a

- - - n/a 0.60 -

6/13/1994 R - 1.9 n/a n/a 1.9 1.3 - n/a

- - - n/a 0.78 -

4/5/1994 R 0.17 I 1.2 n/a n/a - 0.44 I - n/a

- - - n/a 0.14 I -

2/14/1994 R - 0.73 n/a n/a

- - - n/a

- - - n/a

- -

11/29/1993 R -

- n/a n/a

- - - n/a

- - - n/a 0.15 I -

9/27/1993 Y -

- n/a n/a 2.1 0.42 I - n/a

- - - n/a 0.41 -

6/28/1993 Y - 2.4 * n/a n/a 2.6 * 0.61 *T - n/a

- - - n/a 0.58 * -

3/15/1993 N - 0.14 T n/a n/a 0.40 T - - n/a

- - - n/a 0.14 T -

1/25/1993 Y 0.08 T 1.1 n/a n/a 1.6 - - n/a

- - - n/a 0.84 -

11/2/1992 R -

- n/a n/a 0.66 - - n/a

- - - n/a 0.30 -

9/14/1992 Y -

- n/a n/a

- - - n/a

- - - n/a 0.34 * -

7/27/1992 R - 0.15 A n/a n/a

- - - n/a

- - - n/a

- -

6/1/1992 R 0.05 T 2.9 A n/a n/a 0.39 T - - n/a

- - - n/a 0.061 T -

4/6/1992 N - 1.2 A n/a n/a 2.2 A 0.53 A - n/a

- - - n/a 0.33 A -

MIN 0.011 0.01 0.011 0.011 0.04 0.3 0.035 0.017 0.09 0.056 0.011 0.024 0.01 2.5

MAX 0.17 12 1 0.13 7 2.7 0.035 0.052 0.1 0.056 1.2 3.9 7.3 2.5

AVG 0.04 0.72 0.068 0.044 1.61 0.68 0.035 0.028 0.095 0.056 0.36 0.65 0.54 2.5

COUNT 63 19 55 24 12 42 17 1 13 2 1 4 45 51 1

% DETECT 30 87 86 43 67 27 2 21 3 2 6 71 81 2

- denotes that the result is below the method detection limit (MDL)

* results are the average of duplicate samples

I value reported is less than the minimum quantitation limit, and greater than or equal to the minimum detection limit

A value reported is the mean of two or more determinations

1 value exceeds Florida Class III water quality standard for surface water (FAC Chapter 62-302)

2 value exceeds toxicity levels for aquatic invertebrates

n/a compound not analyzed

T value reported is less that the practical quantitation limit 

# Table 2. Summary of pesticide detections (μg/L) in surface water samples collected by SFWMD at CR33.5T (Townsend Canal).



# 9

# flow ametryn atrazine DEA DIA bromacil diuron endosulfan

sulfate ethoprop hexazinone metalaxyl metolachlor metribuzin norflurazon simazine

7/25/2006 Y - 0.19 0.037 I 0.027 I 0.60 0.76

- - 0.012 I -

- - 1.2 0.69

5/17/2006 N - 0.23 0.027 I -

- - - - 0.022 I -

- - 0.024 I 0.016 I

1/31/2006 Y - 0.087 -

- 0.049 I -

- - 0.020 I -

- - 0.13 0.019 I

12/14/2005 Y -

- - - - - - - - - - - - -

8/18/2005 Y - 0.087 -

- 0.094 I -

- - 0.033 I -

- - 0.12 0.032 I

5/25/2005 Y - 0.20 0.024 I -

- - - - 0.027 I -

- - 0.026 I 0.010 I

2/23/2005 Y - 0.11 0.018 I -

- - - - 0.038 I -

- - 0.052 I -

12/1/2004 Y - 0.080 0.012 I -

- - - - 0.041 I -

- - 0.048 I -

7/22/2004 Y - 0.34 0.033 I 0.020 I 0.17 -

- - 0.032 I -

- - 0.40 0.19

4/13/2004 Y - 0.19 0.026 I -

- - - - 0.020 I -

- - 0.071 I 0.013 I

1/14/2004 Y 0.015 I 0.33 0.033 I -

- - - - 0.028 I - 0.13 I - 0.076 0.022 I

10/22/2003 Y - 0.089 0.018 I 0.011 I 0.049 I -

- - 0.034 I -

- - 0.069 I 0.019 I

7/23/2003 Y - 0.075 0.011 I - 0.27 -

- - - - - - 0.26 0.097

5/14/2003 Y 0.018 I * 2.3 * 0.097 * 0.022 I * 0.16 * -

- - 0.024 I * -

- - 0.18 * 0.081 *

3/13/2003 Y - 0.15 0.018 I - 0.052 I -

- - - - - - 0.14 0.024 I

11/19/2002 Y - 0.56 * 0.036 I * 0.030 I * - 0.86 * -

- - - - - - 0.50 *

9/18/2002 Y - 0.045 -

- - - - - - - - - 0.21 0.066

6/5/2002 N 0.011 I 0.23 0.049 0.034 I 0.53 -

- - - - - - 0.19 0.34

2/5/2002 N 0.032 I 0.34 0.020 I 0.015 I 0.25 -

- - 0.019 I -

- - 0.26 0.10

12/18/2001 N 0.015 I 0.27 0.020 I 0.025 I 0.86 0.27 I -

- - - - - 0.44 0.40

8/15/2001 Y -

- - 0.025 I 2.0

- - - - - - - 0.58 0.67

5/22/2001 N 0.023 I 0.28

- - 0.53 0.24 I -

- - - - - 0.25 0.35



# 3/20/2001 N - 0.11 0.021 I 0.017 I 0.11 I -

- - - - - - 0.17 0.1



# 11/15/2000 N 0.043 -

- 1.1

- - - - - - 0.38 0.18

8/9/2000 N 0.019 I 0.22 0.022 I 0.015 I 1.2

- - - - - 0.13 I - 0.36 0.17

5/3/2000 Y - 0.33 0.031 I -

- - - - - - - - - 0.023 I

2/10/2000 Y - 0.089 * 0.013 I * -

- - - - - - - - 0.086 I * 0.029 I *

11/16/1999 Y - 0.065 0.013 I - 0.07 I -

- - - - - - 0.035 I -

8/10/1999 N 0.045 I 0.046 I n/a n/a 0.23 -

- - - 0.064 I -

- 0.31 0.028 I

4/26/1999 N 0.029 I 0.37 n/a n/a

- - - - - - - 0.031 I 0.045 I -

1/11/1999 Y 0.011 I 0.36 n/a n/a 0.25 -

- - - - - - 0.43 0.10

12/14/1998 Y 0.013 I 0.78 n/a n/a

- - - 0.032 I -

- - - 0.49 0.052 I

10/1/1998 Y 0.058 0.046 I n/a n/a 0.34 -

- - - - - - 0.40 0.020 I

6/18/1998 N - 0.13 * n/a n/a 0.66 * 0.82 * -

- - - - - 0.29 * 0.20 *

3/3/1998 Y 0.010 I 0.16 n/a n/a 0.13 -

- - - - - - 0.086 I 0.028 I

11/20/1997 Y - 0.093 * n/a n/a 0.75 * -

- - - - - - 0.42 * 0.11 *

8/18/1997 Y 0.024 *I 0.21 * n/a n/a - 0.48 *I -

- 0.023 *I -

- 0.022 *I 0.81 * 0.072 *I

5/12/1997 Y 0.011 I 0.67 n/a n/a 0.60 0.56 I -

- - - 0.12 I - 0.37 0.058 I

2/24/1997 N 0.019 * 0.22 * n/a n/a

- - - - - - - - 0.086 * -

10/14/1996 Y 0.014 0.039 n/a n/a 0.66 -

- - - - - - 0.31 0.074

7/22/1996 N 0.017 0.072 n/a n/a 0.18 -

- - 0.022

- - - 0.18 0.051

4/15/1996 N 0.043 * 1.03 * n/a n/a 0.11 * -

- - 0.023 * -

- - 0.11 * 0.027 *

1/22/1996 Y 0.038 0.26 n/a n/a 0.11 -

- - 0.029

- - - 0.12 0.025

10/9/1995 Y 0.015 0.088 n/a n/a 1.9

- - - - - - - 0.43 0.25

8/7/1995 0.01 0.036 n/a n/a 0.56 -

- - 0.022

- - - 0.15 0.029

6/5/1995 0.016 0.26 n/a n/a 1.5 0.48 0.023

- 0.046

- - - 0.3 0.54

3/27/1995 0.041 0.60 n/a n/a 0.12 -

- - 0.04

- - - 0.079 0.02

12/5/1994 Y -

- n/a n/a

- - - - - - - - - -

9/26/1994 - -

- n/a n/a 0.6 I -

- - n/a -

- - n/a

-

7/25/1994 N - 0.22 I n/a n/a 0.87 I 3.6

- - n/a

- - - n/a 0.30

6/13/1994 Y - 1.8 n/a n/a 0.78 I 0.52 I -

- n/a

- - - n/a 0.3

4/5/1994 N - 1.2 n/a n/a - 0.52 I -

- n/a

- - - n/a 0.18 I

2/14/1994 N - 0.23 I n/a n/a

- - - - n/a

- - - n/a

-

11/29/1993 N -

- n/a n/a

- - - - n/a

- - - n/a

-

9/27/1993 - -

- n/a n/a 1.8

- - - n/a

- - - n/a 0.28

6/28/1993 N - 0.79 n/a n/a 1.3 T 0.84

- - n/a

- - - n/a 0.56

3/15/1993 N - 0.15 T n/a n/a

- - - - n/a

- - - n/a 0.081 T

1/25/1993 Y 0.18 T 1.0 n/a n/a

- - - - n/a

- - - n/a 0.09 T

11/2/1992 - 0.05 T - n/a n/a 0.60 -

- - n/a

- - - n/a 0.16

9/14/1992 N 0.062 - n/a n/a

- - - - n/a

- - - n/a

-

7/27/1992 N -

- n/a n/a 1.1 A -

- - n/a

- - - n/a

-

6/1/1992 N 0.039 T 1.4 A n/a n/a 0.75 T -

- - n/a

- - - n/a

-

4/6/1992 N - 1.2 A n/a n/a

- - - - n/a

- - - n/a 0.23 A

MIN 0.01 0.036 0.011 0.011 0.049 0.24 0.023 0.032 0.012 0.064 0.12 0.022 0.024 0.01

MAX 0.18 2.3 0.097 0.034 2 3.6 0.023 0.032 0.046 0.064 0.13 0.031 1.2 0.69

AVG 0.03 0.38 0.028 0.022 0.60 0.83 0.023 0.032 0.028 0.064 0.13 0.027 0.25 0.160

COUNT 63 28 54 21 11 40 12 1 1 20 1 3 2 44 50

% DETECT 44 86 75 39 63 19 2 2 42 2 5 3 92 79

- denotes that the result is below the method detection limit (MDL)

* results are the average of duplicate samples

I value reported is less than the minimum quantitation limit, and greater than or equal to the minimum detection limit

A value reported is the mean of two or more determinations

1 value exceeds Florida Class III water quality standard for surface water (FAC Chapter 62-302)

2 value exceeds toxicity levels for aquatic invertebrates

n/a compound not analyzed

T value reported is less that the practical quantitation limit 

# Table 3. Summary of pesticide detections (μg/L) in surface water samples collected by SFWMD at S79.



# 10

# 11 Y 0.018 I * 0.059 * 0.015 I * 0.029 I * - -- - - - 0

. 7 0 * 0.13



# N 0.016 I 0.38 0.082 0.024 I

- - - 0.37

- - - 0.017



# N 0.016 I 0.26 0.03 I 0.015 I 0.078 I -

- - - - 0.026 I 0.013



# N 0.028 I 0.26 0.021 I -

- - - 0.026 I -

- 0.31 0.019

N - - 0.021 I* 0.011 I* -

- - 0.025 I* -

- 0.33 * 0.044

Y - 0.27 0.039 I -

- - - - - - - 0.012

Y 0.015 I 0.16 0.018 I - - -- - - - 0

. 0 3 7 I

-

9 Y - 0.061 0.01 I -

- - - - - - - -

N 0.068 0.094 n/a n/a 0.33

- - 0.024 I -

- 0.63 0.023

Y 0.015 I* 0.37 * n/a n/a

- - - - - - - -

Y 0.039 I 0.53 n/a n/a

- - - - - - - -

8 N - 0.92 n/a n/a 0.25 - 0.039 I -

- - 0.19

-

Y 0.049 0.061 n/a n/a 0.45

- - - - - 0.55

-

N 0.010 I 0.15 n/a n/a

- - - - - - - -

Y 0.0097 I 0.14 n/a n/a 0.090 I -

- - - - 0.046 I -

7 N 0.024 I 0.13 n/a n/a 0.23

- - - - - 0.11 I 0.093

Y 0.048 0.12 n/a n/a 0.70 0.48 I - 0.034 I -

- 0.63 0.074

N 0.19 * 0.67 * n/a n/a 0.17 *I -

- - - - 0.13 *I -

N 0.018 0.21 n/a n/a

- - - - - - - -

6 Y 0.028 0.056 n/a n/a

- - - - - - 0.036

-

Y 0.016 0.099 n/a n/a

- - - - - 0.12 0.18 0.021

Y 0.02 0.36 n/a n/a 0.089 -

- 0.024

- - - 0.02

N 0.013 0.1 n/a n/a 0.096 -

- 0.031

- - - -

5 Y 0.033 0.29 n/a n/a 0.2

- - 0.03 0.039

- 0.13 0.11

0.026 0.097 n/a n/a 0.19

- - 0.024

- - 0.089 0.069

0.023 0.25 n/a n/a 0.055 -

- 0.056

- - - -

0.024 0.32 n/a n/a 0.12

- - 0.046

- - - -

4 Y - - n/a n/a

- - - - - - - -

Y - - n/a n/a

- - - n/a

- - n/a

-

N - 0.16 I n/a n/a 0.4 I 0.8 I - n/a

- - n/a

-

Y - 0.65 n/a n/a 0.88 I 0.72 I - n/a

- - n/a 0.16

N 0.16 I 2.2 n/a n/a

- - - n/a

- - n/a

-

N 0.21 I 1.6 n/a n/a

- - - n/a

- - n/a

-

3 N - 0.16 I n/a n/a

- - - n/a

- - n/a

-

- - - n/a n/a

- - - n/a

- - n/a

-

Y - 0.66 n/a n/a

- - - n/a

- - n/a

-

Y - 0.51 n/a n/a

- - - n/a

- - n/a

-

Y - 0.34 T n/a n/a 0.37 T -

- n/a

- - n/a

-

2 - 0.037 T 0.039 T n/a n/a

- - - n/a

- - n/a 0.042

Y - - n/a n/a

- - - n/a

- - n/a

-

N - 0.19 A n/a n/a

- - - n/a

- - n/a

-

N - 0.32 A n/a n/a

- - - n/a

- - n/a

-

N - 2.1 A n/a n/a

- - - n/a

- - n/a

-

0.0097 0.039 0.01 0.011 0.049 0.48 0.039 0.017 0.039 0.12 0.02 0.011

0.21 2.2 0.082 0.029 0.88 0.8 0.039 0.37 0.039 0.14 0.7 0.16

0.04 0.37 0.03 0.017 0.23 0.67 0.039 0.05 0.039 0.13 0.19 0.039

63 32 57 26 10 22 3 1 22 1 2 28 27

T 51 90 93 36 35 5 2 46 2 3 58 43

at the result is below the method detection limit (MDL)

the average of duplicate samples

rted is less than the minimum quantitation limit, and greater than or equal to the minimum detection limit

orted is the mean of two or more determinations

eeds Florida Class III water quality standard for surface water (FAC Chapter 62-302)

eeds toxicity levels for aquatic invertebrates

nd not analyzed

orted is less that the practical quantitation limit flow ametryn atrazine DEA DIA bromacil diuron ethoprop hexazinone malathion metolachlor norflurazon simazine



# 7/25/2006 Y 0.015 I 0.13 0.022 I - 0.061 I -

- 0.024 I -

- 0.19 0.012 I



# 5/17/2006 N

- 0.21 0.029 I -

- - - 0.017 I -

- - 0.015 I



# 1/31/2006 Y

- 0.27 0.016 I -

- - - 0.030 I -

- 0.034 I 0.011 I



# 12/14/2005 Y

- -- - - -- - - - - -



# 8/18/2005 Y - 0.098 0.017 I -

- - - 0.041

- - - 0.020 I



# 5/25/2005 Y

- 0.17 0.030 I -

- - - 0.023 I -

- - -



# 2/23/2005 N

- 0.11 0.017 I -

- - - 0.039 I -

- - -



# 12/1/2004 Y

- 0.10 0.020 I -

- - - - - - - -



# 7/22/2004 Y 0.021 I 0.78 0.081 0.016 I 0.058 I -

- 0.17

- - 0.10 0.033 I



# 4/13/2004 Y

- 0.20 0.028 I - - --0

. 0 2 0 I

-- --



# 1/14/2004 Y

- 0.17 0.025 I - - -- - - - 0

. 0 2 5 I 0.012 I



# 10/22/2003 Y

- 0.12 0.018 I 0.011 I 0.049 I --0

. 0 3 4 I

- - 0.069 I 0.019 I



# 7/23/2003 Y - 0.083 0.012 I

- - - - - - - 0.078 0.016 I



# 5/14/2003 Y 0.0098 I 0.47 0.041 0.015 I - -- - - 0

. 1 4 I 0.040 I 0.012 I



# 3/13/2003 Y

- 0.20 0.022 I - - -- - - - 0

. 0 2 0 I

-



# 11/19/2002 Y

- 0.22 0.019 I - - -- - - - 0

. 0 6 5 I

-



# 9/18/2002 Y - 0.057 -

- - - - - - - 0.034 I

-



# 6/5/2002 N 0.013 I 0.58 0.063 0.021 I - -- - - - - 0

. 0 2 2 I



# 2/5/2002 N 0.079 0.92 0.042 0.013 I 0.054 I --0

. 0 2 8 I

- - 0.11 0.020 I



# 12/18/2001 N 0.052 * 0.75 * 0.044 * 0.017 I * 0.054 I * --0

. 0 2 4 I * - -0

. 3 0 * 0.024 I *



# 8/15/2001 *



# 5/22/2001 I



# 3/20/2001 I



# 11/15/2000 I

8/9/2000 I*

5/3/2000 I

2/10/2000

11/16/199

8/9/1999 I

4/26/1999

1/11/1999

12/14/199

10/1/1998

6/18/1998

3/3/1998

11/20/199 I

8/18/1997 I

5/12/1997

2/24/1997

10/14/199

7/23/1996

4/15/1996

1/22/1996

10/9/199

8/7/1995

6/5/1995

3/27/1995

12/5/199

9/26/1994

7/25/1994

6/13/1994 I

4/5/1994

2/14/1994

11/29/199

9/27/1993

6/28/1993

3/15/1993

1/25/1993

11/2/199 T

9/14/1992

7/27/1992

6/1/1992

4/6/1992

MIN

MAX

AVG

COUNT

% DETEC

- denotes th

* results are

I value repo

A value rep

1 value exc

2 value exc

n/a compou

T value rep 

# Table 4. Summary of pesticide detections (μg/L) in surface water samples collected by SFWMD at S78.Table 5. Selected properties of pesticides detected.SurfaceLD50Water acute ratsWaterSoilStandards oral EPA Solubility Koc Half-lifeVolatilityFAC 62-302 (mg/kg) Carcinogenic (mg/L) (mL/g) (days)frrom BioconcentrationCommon Name (μg/L) (1) Potential (2, 3) (2, 3) (2, 3) LE SA SS Water Factor (BCF)2,4-D(100) 375D890 20 10 M S M I13aldicarb-0.93- 6,000 30 30 L S M -5ametryn- 1,110 D185 300 60 M M M I33atrazine- 3,080 C33 100 60 L M L I86bromacil- 5,200 C700 32 60 L M M I15diuron- 3,400 D42 480 90 M M L I75hexazinone- 1,690 D 33,000 54 90 L M M I2metalaxyl-669- 7,100 100 70 L M M I4metolachlor- 2,780 C530 200 90 L M M I18norflurazon- 9,400 C28 700 90 M M L I94simazine- >5,000 C6.2 130 60 L M M I221SCS Ratings are pesticide loss due to leaching (LE), surface adsorption (SA) or surface solution (SS) and grouped as large(L),medium (M), small (S) or extra small (XS)Volatility from water: R = rapid, I = insignificant, S = significantBioconcentration Factor (BCF) calculated as BCF = 10(2.791 - 0.564 log WS)(4)B2: probable human carcinogen; C: possible human carcinogen; D: not classified; E: evidence of non-carcinogen for humans (5)FDEP surface water standards (7/04) for Class III waters except Class I in ( )(1) Hartley, D. and H. Kidd. (Eds.) (1987).(2) Goss, D. and R. Wauchope. (Eds.) (1992).(3) Montgomery, J.H. (1993).(4) Lyman,W.J., W.F. Reehl, and D.H. Rosenblatt. (1990).(5) U.S. Environmental Protection Agency (1996).SoilConservationService (SCS)Rating (2)12Table 6.13chronictoxicity2,4-D-aldicarb-ametryn-atrazine380bromacil-diruon-hexazinon-metalaxyl-metolachlor245norflurazo>10,000simazine-(*) Florida Adrespectivesignifican(#) Species is(1) Hartley(2) Montgomer(3) U.S. E(4) Mayer(5) U.S. E(6) JohnsCommonNameToxicity of pesticides detected to freshwater aquatic invertebrates and fishes (μg/L).48-hr EC5096-hr LC5096-hr LC5096-hr LC5096-hr LC5096-hr LC50Water fleaFatheadMinnow (#)acute chronic Bluegill acute chronicLargemouthBassacute chronicRainbow Trout(#)acute chronicChannelCatfishacuteDaphniaPimephalestoxicity toxicityLepomistoxicity toxicityMicropterustoxicity toxicityOncorhynchustoxicity toxicityIctalurustoxicitymagnapromelasmacrochirussalmoidesmykisspunctatus25,000 (3) 8,333 1,250 133,000 (3) 44,333 6,650 180,000 (4) 60,000 9,000 -- - 100,000 (1) 33,333 5,000 --51 (5) 17 3 -- - 50 (5) 17 3560 (6) 187 28 --28,000 (3) 9,333 1,400 -- - 4,100 (1) 1,367 205 -- - 8,800 (1) 2,933 440 --6,900 (3) 2300 345 15,000 (3) 5,000 750 16,000 (1) 5,333 800 -- - 8,800 (1) 2,933 440 7,600 (1) 2,533-- - -- - 127,000 (2) 42,333 6,350- - 36,000 (2) 12,000 1,800-1,400 (3) 467 70 14,200 (3) 4,733 710 5,900 (1) 1967 295 -- - 5,600 (1) 1,867 280 --e 151,600 (3) 50,533 7,580 274,000 (1) 91,333 13,700 100,000 (3) 33,333 5,000 -- - 180,000 (3) 60,000 9,000 --28,000 (3) 9,333 1,400 -139,000 (3) 46,333 6,950 -- - 132,000 (3) 44,000 6,600 --23,500 (3) 7,833 1,175 -- - 15,000 (1) 5,000 750 -- - 2,000 (1) 667 100 4,900 (2) 1,633n 15,000 (3) 5,000 750 -- - 16,300 (3) 5,433 815 -- - 8,100 (3) 2,700 405 >200,000 (1) >67,0001,100 (3) 367 55 100,000 (3) 33,333 5,000 90,000 (1) 30,000 4,500 -- - 100,000 (3) 33,333 5,000 --ministrative Code (FAC) 62-302.200, for compounds not specifically listed, acute and chronic toxicity standards are calculated as one-third and one-twentieth,ly, of the amount lethal to 50% of the test organisms in 96 hours, where the 96 hour LC50 is the lowest value which has been determined for a speciest to the indigenous aquatic community.not indigenous. Information is given for comparison purposes only., D. and H. Kidd. (Eds.) (1987).y, J.H. (1993).nvironmental Protection Agency (1991)., F.L., and M.R. Ellersieck (1986).nvironmental Protection Agency (2005).on, U.W. and M.T. Finley (1980).acutetoxicity(*)chronictoxicity(*)

# 14 Metals

One hundred and eight 

# samples were analyzed from nine sites (Figure 1). All of the metal

concentrations detected were be low the appropriate criteria with the exception of one copper and

two lead values (Table 7).

The grab sample obtained at the Crawford Canal site during March was the only copper

exceedance.

Both of the lead crite ria exceedances occurred at the C- 19 Canal during the April and June

sampling events.sample number typestarttime start dateendtime end dateSitehardnessmg/LCaCo3Class III drainage basin: sugarcane and citrusP020206-1 G 10:15 2/2/2006 N/A N/A 833-Whidden36.3 8.3 124.8 1.5 I≤50 0.032 I≤0.0077≤0.13 -≤1.35≤103.34 -≤11.27 0.50≤4.22 1.5 I≤62.92 -≤5.0 -≤144.6P030206-2 G 10:25 3/2/2006 N/A N/A 833-Whidden43.8 9.4 148.1 1.5 I≤50 0.034 I≤0.0077≤0.13 -≤1.54≤118.86 1.52≤13.05 0.64≤5.24 2.5 I≤72.71 -≤5.0 -≤167.1P033006-4 G 12:15 3/30/2006 N/A N/A 833-Whidden79.7 8.2 232.8 1.4 I≤50 -≤0.0077≤0.13 -≤2.20≤172.16 -≤19.20 0.15 I≤9.33 2.2 I≤106.61 -≤5.0 -≤245.1P042706-5 G 12:55 4/27/2006 N/A N/A 833-Whidden43.2 10.6 151.5 2.0 I≤50 0.050 I≤0.0077≤0.13 0.95 I≤1.57 2.1 I≤121.12 1.97≤13.31 1.2≤5.40 1.8 I≤74.14 -≤5.0 3.8 I≤170.4P052506-1 G 10:00 5/25/2006 N/A N/A 833-Whidden43.3 10.9 153.0 2.3≤50 0.036 I≤0.0077≤0.13 -≤1.58 1.16 I≤122.09 1.28≤13.42 0.61 I≤5.47 1.2 I≤74.75 -≤5.0 -≤171.8P062206-1 G ? 6/22/2006 N/A N/A 833-Whidden44.6 11.7 159.5 3.3≤50 0.033 I≤0.0077≤0.13 0.081 I≤1.64 1.08 I≤126.35 -≤13.91 0.79 I≤5.77 -≤77.45 -≤5.0 -≤178.0P072706-1 G 10:20 7/27/2006 N/A N/A 833-Whidden78.3 7.9 228.0 1.7 I≤50 -≤0.0077≤0.13 -≤2.17 0.45 I≤169.29 -≤18.87 -≤9.09 1.1 I≤104.77 -≤5.0 -≤240.9P091406-2 G 9:20 9/13/2006 N/A N/A 833-Whidden67.7 6.5 195.8 1.8 I≤50 -≤0.0077≤0.13 -≤1.92 -≤149.43 0.82≤16.57 0.64 I≤7.48 -≤92.10 -≤5.0 -≤211.7P100206-1 G 10:30 10/2/2006 N/A N/A 833-Whidden64.5 9.3 199.4 2.3≤50 -≤0.0077≤0.13 -≤1.95 -≤151.63 -≤16.82 0.34 I≤7.66 -≤93.51 -≤5.0 5.8 I≤215.0P110206-1 G 10:10 11/2/2006 N/A N/A 833-Whidden49.2 7.6 154.1 1.8 I≤50 0.024 I≤0.0077≤0.13 -≤1.59 0.37 I≤122.84 1.07≤13.50 0.36 I≤5.52 -≤75.22 -≤5.0 4.0 I≤172.9Class III drainage basin: sugarcaneP013006-3 AS 12:00 1/30/2006 12:03 1/31/2006 C-19 canal33.5 8.1 117.0 1.7 I≤50 0.047 I≤0.0077≤0.13 -≤1.28≤98.01≤10.67 1.0≤3.89 1.03 ?≤59.58 0.89 I≤5.0 -≤136.9P022806-3 AS 11:35 2/27/2006 10:35 2/28/2006 C-19 canal42.7 8.9 143.3 1.4 I≤50 0.044 I≤0.0077≤0.13 -≤1.50≤115.69 1.19≤12.68 0.71≤5.03 1.6 I≤70.71 -≤5.0 -≤162.5P030106-6 AS 11:06 2/28/2006 10:06 3/1/2006 C-19 canal41.2 8.8 139.1 1.2 I≤50 0.031 I≤0.0077≤0.13 -≤1.47≤112.93 1.31≤12.37 0.60≤4.84 1.6 I≤68.97 -≤5.0 -≤158.5P032806-3 AS 11:30 3/27/2006 12:55 3/28/2006 C-19 canal47.6 8.0 151.8 1.4 I≤50 -≤0.0077≤0.13 0.086 I≤1.57≤121.30 -≤13.33 0.54≤5.41 1.0 I≤74.25 -≤5.0 -≤170.7P042606-3 AS 10:30 4/25/2006 9:30 4/26/2006 C-19 canal47.0 9.2 155.2 1.6 I≤50 -≤0.0077≤0.13 -≤1.60 -≤123.55 0.73≤13.58 0.23 I≤5.57 1.1 I≤75.68 -≤5.0 -≤173.9P042706-4 AS 10:40 4/26/2006 9:40 4/27/2006 C-19 canal48.2 9.1 157.8 1.7 I≤50 -≤0.0077≤0.13 -≤1.62 1.1 I≤125.23 0.84 I≤13.7811.3≤5.69 1.6 I≤76.74 -≤5.0 -≤176.4P052306-5 AS 10:00 5/22/2006 9:00 5/23/2006 C-19 canal43.9 10.5 152.9 2.0 I≤50 0.031 I≤0.0077≤0.13 -≤1.58 0.69 I≤121.99 1.05≤13.41 0.36 I≤5.46 -≤74.69 0.54 I≤5.0 7.5 I≤171.7P052406-4 AS 11:45 5/23/2006 10:45 5/24/2006 C-19 canal45.3 10.3 155.5 2.0 I≤50 0.026 I≤0.0077≤0.13 -≤1.60 0.50 I≤123.74 0.85≤13.61 0.41 I≤5.58 -≤75.79 -≤5.0 3.9 I≤174.2P062006-3 AS 9:26 6/19/2006 8:26 6/20/2006 C-19 canal56.8 9.9 182.6 2.4≤50 -≤0.0077≤0.13 -≤1.82 0.88 I≤141.11 0.92 I≤15.617.36≤6.85 -≤86.81 -≤5.0 -≤199.6P062106-3 AS 10:30 6/20/2006 9:30 6/21/2006 C-19 canal53.7 9.7 174.0 2.4≤50 0.025 I≤0.0077≤0.13 -≤1.75 0.64 I≤135.67 0.73 I≤14.98 0.27 I≤6.44 -≤83.36 -≤5.0 -≤191.6P072506-3 AS 11:15 7/24/2006 11:20 7/25/2006 C-19 canal78.8 9.7 236.7 2.0≤50 0.035 I≤0.0077≤0.13 -≤2.23 0.86 I≤174.54 1.72≤19.48 -≤9.53 -≤108.13 -≤5.0 5.0 I≤248.6P072606-3 AS 11:20 7/25/2006 10:37 7/26/2006 C-19 canal68.9 9.7 212.0 2.4≤50 0.048 I≤0.0077≤0.13 -≤2.05 1.70≤159.46 3.01≤17.73 -≤8.28 -≤98.50 -≤5.0 7.8 I≤226.5SD091206-3 AS 10:55 9/12/2006 ? ? C-19 canal68.3 7.3 200.6 2.4≤50 -≤0.0077≤0.13 -≤1.96 -≤152.41 -≤16.91 0.26 I≤7.72 -≤94.00 -≤5.0 4.7 I≤216.1P091306-5 AS 11:15 9/12/2006 11:45 9/13/2006 C-19 canal55.2 6.4 164.2 1.8 I≤50 0.027 I≤0.0077≤0.13 -≤1.67 -≤129.35 0.81≤14.25 0.28 I≤5.98 -≤79.35 -≤5.0 3.9 I≤182.4P092606-3 AS 10:50 9/25/2006 10:15 9/26/2006 C-19 canal53.3 6.4 159.4 2.0≤50 -≤0.0077≤0.13 -≤1.64 0.60 I≤126.28 0.80 I≤13.90 0.30 I≤5.76 -≤77.41 -≤5.0 4.2 I≤177.9P092706-3 AS 10:23 9/26/2006 9:23 9/27/2006 C-19 canal53.0 6.3 158.3 2.0 I≤50 -≤0.0077≤0.13 -≤1.63 0.52 I≤125.53 -≤13.81 0.25 I≤5.71 1.2 I≤76.93 -≤5.0 6.5 I≤176.8P103106-3 AS 9:51 10/30/2006 10:13 10/31/2006 C-19 canal43.2 7.5 138.8 1.6 I≤50 -≤0.0077≤0.13 -≤1.47 0.53 I≤112.70 0.71 I≤12.34 0.44 I≤4.83 -≤68.82 -≤5.0 -≤158.1P110106-3 AS 10:12 10/31/2006 9:12 11/1/2006 C-19 canal43.5 8.1 142.0 1.7 I≤50 -≤0.0077≤0.13 -≤1.49 0.49 I≤114.83 0.66 I≤12.59 0.31 I≤4.97 -≤70.17 -≤5.0 -≤161.2P022706- blank BDL 11:30 2/27/2006 N/A N/A C-19 Canal EB---≤50 -≤0.0077≤0.13 -----≤5.0 -P052406-5 BDL 11:20 5/23/2006 N/A N/A FIELD BLANK---≤50 -≤0.0077≤0.13 -----≤5.0 -P062106-4 BDL 12:40 6/21/2006 N/A N/A EQUIPMENT BLANK 0.087 0.0068 I 0.2 -≤50 -≤0.0077≤0.13 -≤0.01 0.34 I≤0.63 -≤0.05 -≤0.00 -≤0.32 -≤5.0 -≤0.7P091306-2 BDL 9:00 9/12/2006 N/A N/A FIELD BLANK0 0.012 I 0.0 -≤50 -≤0.0077≤0.13 -≤0.00 -≤0.17 -≤0.01 -≤0.00 -≤0.08 -≤5.0 -≤0.2P092606-410:05 9/26/2006 N/A N/A EQUIPMENT BLANK 0.14 0.0079 I 0.4 -≤50 -≤0.0077≤0.13 -≤0.01 -≤0.90 -≤0.08 0.83≤0.00 -≤0.47 -≤5.0 3.7 I≤1.1P110106-4 BDL 10:30 11/1/2006 N/A N/A FIELD BLANK000.0 -≤50 -≤0.0077≤0.13 -≤#NUM! -≤#NUM! -≤#NUM! -≤#NUM! -≤#NUM! -≤5.0 -≤#NUM!Class III drainage basin: citrus, field crops, and pasturelandP013006-4 G 13:10 1/30/2006 N/A N/A C-3 Canal52.2 7.9 162.9 1.2 I≤50 -≤0.0077≤0.13 -≤1.66≤128.50 0.99 I≤14.15 0.30≤5.92 0.42 I≤78.81 0.76 I≤5.0 -≤181.1P030106-5 G 10:15 3/1/2006 N/A N/A C-3 Canal84.1 4.9 230.2 0.92 I≤50 -≤0.0077≤0.13 -≤2.18≤170.58 0.54 I≤19.02 0.077 I≤9.19 1.0 I≤105.60 -≤5.0 -≤242.8P032806-6 G 11:30 3/28/2006 N/A N/A C-3 Canal49.4 8.9 160.0 1.7 I≤50 -≤0.0077≤0.13 0.22≤1.64≤126.64 -≤13.94 0.32≤5.79 1.4 I≤77.63 0.50 I≤5.0 -≤178.4P052306-4 G 10:30 5/23/2006 N/A N/A C-3 Canal49.2 10.6 166.5 2.0≤50 0.024 I≤0.0077≤0.13 -≤1.69 1.03 I≤130.84 1.10≤14.42 0.44 I≤6.09 -≤80.29 -≤5.0 -≤184.6P062006-4 G 11:12 6/20/2006 N/A N/A C-3 Canal49.8 11.0 169.6 2.7≤50 -≤0.0077≤0.13 -≤1.72 1.00 I≤132.86 1.15 I≤14.65 0.27 I≤6.24 -≤81.58 -≤5.0 -≤187.5P072606-5 G 13:01 7/26/2006 N/A N/A C-3 Canal78.2 7.9 227.8 1.6 I≤50 -≤0.0077≤0.13 -≤2.17 0.48 I≤169.14 0.30 I≤18.85 -≤9.07 -≤104.68 -≤5.0 3.6 I≤240.7P091306-4 G ? 9/12/2006 N/A N/A C-3 Canal71.5 6.4 204.9 2.0 I≤50 -≤0.0077≤0.13 -≤1.99 -≤155.07 0.77 I≤17.22 -≤7.93 1.0 I≤95.70 -≤5.0 9.9 I≤220.0P092606-5 G 11:03 9/26/2006 N/A N/A C-3 Canal75.3 6.7 215.6 1.7 I≤50 -≤0.0077≤0.13 -≤2.07 -≤161.69 -≤17.99 -≤8.46 -≤99.92 -≤5.0 5.0 I≤229.7P103106-4 G 10:47 10/31/2006 N/A N/A C-3 Canal71.2 8.3 212.0 1.7 I≤50 -≤0.0077≤0.13 -≤2.05 0.46 I≤159.45 0.77 I≤17.73 0.31 I≤8.28 -≤98.49 -≤5.0 3.9 I≤226.4Class IIIP030206-3 G 12:10 3/2/2006 N/A N/A C43-site 242.4 8.7 141.7 1.6 I≤50 -≤0.0077≤0.13 -≤1.49≤114.65 1.26≤12.57 0.41≤4.96 1.8 I≤70.05 -≤5.0 -≤161.0P033006-3 G 10:45 3/30/2006 N/A N/A C43-site 245.0 9.4 151.1 1.5 I≤50 -≤0.0077≤0.13 -≤1.57≤120.83 -≤13.27 0.31≤5.38 1.7 I≤73.95 -≤5.0 -≤170.0P042706-3 G 10:50 4/27/2006 N/A N/A C43-site 242.1 9.8 145.5 1.9 I≤50 0.056 I≤0.0077≤0.13 -≤1.52 1.4 I≤117.15 1.22≤12.85 0.41≤5.13 1.5≤71.63≤5.0≤164.6P052506-2 G 11:45 5/23/2006 N/A N/A C43-site 246.0 10.7 158.9 2.0≤50 0.032 I≤0.0077≤0.13 -≤1.63≤125.94 1.18≤13.86 0.30 I≤5.74 -≤77.19 0.52 I≤5.0 -≤177.4P062206-2 G ? 6/22/2006 N/A N/A C43-site 251.6 10.3 171.3 3.0≤50 -≤0.0077≤0.13 -≤1.73 0.33 I≤133.90 -≤14.77 -≤6.31 -≤82.23 -≤5.0 -≤189.0P072706-2 G 12:13 7/27/2006 N/A N/A C43-site 272.5 9.2 218.9 2.2≤50 -≤0.0077≤0.13 -≤2.10 -≤163.72 -≤18.22 -≤8.63 -≤101.21 -≤5.0 -≤232.7P100206-2 G 12:00 10/2/2006 N/A N/A C43-site 268.5 7.1 200.3 2.1≤50 -≤0.0077≤0.13 -≤1.96 -≤152.21 -≤16.89 -≤7.70 -≤93.88 -≤5.0 3.5 I≤215.8P110206-2 G 11:46 11/2/2006 N/A N/A C43-site 278.1 8.6 230.4 2.0 I≤50 -≤0.0077≤0.13 -≤2.18 0.41 I≤170.74 1.25≤19.04 0.23 I≤9.21 -≤105.70 -≤5.0 -≤243.1G grabAS autosamplerN/A not applicable- denotes that the result is below the method detection limit (MDL)* results are the average of duplicate samplesI value reported is less than the minimum quantitation limit, and greater than or equal to the minimum detection limitA value reported is the mean of two or more determinations270 ml per hour for 24 hoursnickel μg/Lseleniumμg/Lberylliumμg/Lcopper μg/Llead μg/LFAC 62-302Class I/IIIcalculatedcriteria μg/Lcadmiumμg/LFAC 62-302Class Icriteria μg/LFAC 62-302Class IIIcriteria μg/Lcalciummg/Lmagnesiummg/LFAC 62-302Class I/IIIcalculatedcriteria μg/LFAC 62-302Class I/IIIcalculatedcriteria μg/Lchromiumμg/LFAC 62-302Class I/IIIcalculatedcriteria μg/Larsenicμg/LFAC 62-302Class I/IIIcriteria μg/LFAC 62-302Class I/IIIcalculatedcriteria μg/Lzinc μg/LFAC 62-302Class I/IIIcalculatedcriteria μg/LFAC 62-302Class I/IIIcriteria μg/LTable 7. Summary of analytes (μg/L) above the method detection limit found in suface water samples.15sample number typesta16timClass IP030206-4 G 13:21-≤170.4P033006-1 G 9:30-≤174.7P042706-1 G 9:11-≤172.4P052506-3 G 12:58-≤179.4P062206-4 G ?-≤201.7P0727706-4 G 13:17-≤221.9P100206-3 G 13:0012≤201.8P103106-4 G 13:173.5 I≤253.3Class IP030206-5 G 13:50-≤180.8P033006-2 G 9:45-≤165.4P042706-2 G 9:38-≤172.9P052506-4 G 13:15-≤182.4P062206-3 G ?-≤197.5P072706-3 G 12:58-≤221.5P100206-4 G 13:205.9 I≤199.5P110206-3 G 12:555.5 I≤248.7Class III drainage basin: citrus,P013006-5 G 14:20-≤204.9P022806-4 G ?-≤214.4P032806-5 G 10:403.0 I≤216.4P052306-3 G 9:504.9 I≤224.6P052406-3 G 10:103.4 I≤216.5P062006-5 G 11:453.5 I≤257.2P072606-4 G 12:245.4 I≤268.4SD091206-3 G 12:309.2 I≤222.4P092706-4 G 9:107.0 I≤246.9P103106-5 G 11:495.2 I≤249.6Class III drainage basin: resideP013006-2 AS 9:5-≤259.5P013106-2 AS 10:50-≤251.8P022806-2 AS 9:4-≤256.6P030106-4 AS 9:3-≤232.9P032806-1 AS 9:316≤181.1P032906-1 AS 9:1-≤196.8P042606-1 AS 8:4-≤208.6P052306-1 AS 8:2-≤189.3P052406-1 AS 8:4-≤203.9P062006-1 AS 9:2-≤200.5P062106-1 AS 8:4-≤196.6P0725506-1 AS 9:1≤245.1P072606-1 AS 8:3-≤256.3SD091206-1 AS 8:44.7 I≤262.7P091306-1 AS 9:03.4 I≤263.7P092606-1 AS 8:4-≤289.1P103106-1 AS 8:04.2 I≤254.4P110106-1 AS 8:2-≤257.7Class III drainage basin: citrusP013006-1 AS 8:55.4 I≤181.2013106-1 AS 10:00-≤172.9P030106-3 AS 8:5-≤166.0P030206-1 AS 9:0-≤170.2P032806-2 AS 10:15-≤181.4P032906-2 AS 10:18-≤174.1P042606-2 AS 9:3-≤168.9P052306-2 AS 8:5-≤174.1P052406-2 AS 9:3-≤177.6P062006-2 AS 9:5-≤195.4P062106-2 AS 9:1-≤191.9P072506-2 AS 10:004.4 I≤211.8P072606-2 AS 9:23.1 I≤229.2P091306-3 AS 9:43.9 I≤216.0P091406-1 AS 9:23.6 I≤198.8P092606-2 AS 9:15.5 I≤240.2P092706-2 AS 9:09.4 I≤204.7P103106-2 AS 8:3-≤238.1P110106-2 AS 8:53.7 I≤243.0G grabAS autosamplerN/A not applicable- denotes that the result is bel* results are the average of duplI value reported is less than theA value reported is the mean of270 ml per hour for 24 hoursFAC 62-302Class I/IIIcalculatedcriteria μg/Linc μg/LTable 7. (cont.) Summaryrte start dateendtime end dateSitehardnessmg/LCaCo33/2/2006 N/A N/A C43-site 445.7 9.1 151.6 1.5 I≤50 -≤0.0077≤0.13 -≤1.57≤121.16 1.36≤13.31 0.30 I≤5.40 2.4 I≤74.17 -≤5.03/30/2006 N/A N/A C43-site 446.5 9.7 156.1 1.6 I≤50 -≤0.0077≤0.13 -≤1.61≤124.08 -≤13.65 0.23 I≤5.61 1.1 I≤76.01 -≤5.04/27/2006 N/A N/A C43-site 445.2 9.9 153.6 1.6 I≤50 -≤0.0077≤0.13 -≤1.59 1.2 I≤122.50 1.34≤13.46 0.28 I≤5.50 1.4 I≤75.01 -≤5.05/25/2006 N/A N/A C43-site 447.0 10.6 161.0 2.2≤50 -≤0.0077≤0.13 -≤1.65 0.96 I≤127.30 1.22≤14.01 0.24 I≤5.83 -≤78.05 -≤5.06/22/2006 N/A N/A C43-site 455.4 11.3 184.9 3.1≤50 -≤0.0077≤0.13 -≤1.84≤142.55 -≤15.77 -≤6.96 -≤87.73 -≤5.07/27/2006 N/A N/A C43-site 466.7 A 9.8 A 206.9 2.6 A≤50 -≤0.0077≤0.13 -≤2.01 0.32 I≤156.32 -≤17.36 -≤8.03 1.1 I≤96.50 -≤5.010/2/2006 N/A N/A C43-site 462.2 7.2 185.0 1.9 I≤50 -≤0.0077≤0.13 -≤1.84 -≤142.61 -≤15.78 -≤6.96 -≤87.76 -≤5.011/2/2006 N/A N/A C43-site 479.4 10.6 241.9 1.7 I≤50 -≤0.0077≤0.13 -≤2.27 -≤177.67 1.45≤19.85 -≤9.80 -≤110.14 -≤5.03/2/2006 N/A N/A C43-site 549.1 9.7 162.5 1.6 I≤50 -≤0.0077≤0.13 -≤1.66≤128.29 1.43≤14.13 0.28 I≤5.91 2.2 I≤78.68 -≤5.03/30/2006 N/A N/A C43-site 543.4 9.2 146.3 1.5 I≤50 -≤0.0077≤0.13 -≤1.53≤117.66 -≤12.91 0.29 I≤5.16 -≤71.95 -≤5.04/27/2006 N/A N/A C43-site 545.4 9.9 154.1 1.7 I≤50 -≤0.0077≤0.13 -≤1.59 1.3 I≤122.83 1.29≤13.50 0.28 I≤5.52 1.6 I≤75.22 -≤5.05/25/2006 N/A N/A C43-site 548.1 10.7 164.2 2.1≤50 -≤0.0077≤0.13 -≤1.67 0.66 I≤129.34 1.26≤14.25 -≤5.98 -≤79.34 -≤5.06/22/2006 N/A N/A C43-site 554.1 11.0 180.4 2.9≤50 -≤0.0077≤0.13 -≤1.80≤139.71 -≤15.44 -≤6.74 -≤85.92 -≤5.07/27/2006 N/A N/A C43-site 566.4 9.9 206.6 2.6≤50 -≤0.0077≤0.13 -≤2.00 0.32 I≤156.11 -≤17.34 -≤8.01 1.1 I≤96.36 -≤5.010/2/2006 N/A N/A C43-site 561.4 7.1 182.6 1.9 I≤50 -≤0.0077≤0.13 -≤1.82 0.39 I≤141.09 -≤15.60 -≤6.85 1.1 I≤86.80 -≤5.011/2/2006 N/A N/A C43-site 576.7 11.0 236.8 1.8 I≤50 -≤0.0077≤0.13 -≤2.23 0.34 I≤174.60 1.54≤19.49 -≤9.53 1.0 I≤108.17 -≤5.0field crops, and pastureland1/30/2006 N/A N/A Crawford Canal 59.1 9.9 188.3 1.7 I≤50 -≤0.0077≤0.13 -≤1.86≤144.74 3.28≤16.02 0.18 I≤7.12 0.96 I≤89.12 -≤5.02/28/2006 N/A N/A Crawford Canal 62.1 A 10.6 A 198.7 1.7 I≤50 -≤0.0077≤0.13 -≤1.94≤151.24 2.93 A≤16.78 0.13 I≤7.63 1.5 I≤93.25 -≤5.03/28/2006 N/A N/A Crawford Canal 61.5 11.5 200.9 1.8 I≤50 -≤0.0077≤0.13 0.12 I≤1.96≤152.6122≤16.93 0.18 I≤7.73 1.8 I≤94.13 -≤5.05/23/2006 N/A N/A Crawford Canal 64.1 12.1 209.9 2.5≤50 -≤0.0077≤0.13 -≤2.03 0.53 I≤158.16 3.04≤17.58 -≤8.18 -≤97.67 -≤5.05/??/06 N/A N/A Crawford Canal 60.7 12.0 201.0 2.3≤50 -≤0.0077≤0.13 0.051 I≤1.96 0.46 I≤152.65 2.62≤16.94 -≤7.74 -≤94.15 -≤5.06/20/2006 N/A N/A Crawford Canal 76.7 13.3 246.3 3.6≤50 -≤0.0077≤0.13 -≤2.30 0.63 I≤180.30 2.97≤20.15 -≤10.02 -≤111.82 -≤5.07/26/2006 N/A N/A Crawford Canal 84.1 11.9 259.0 2.9≤50 -≤0.0077≤0.13 -≤2.39 0.47 I≤187.89 4.28≤21.04 -≤10.69 1.4 I≤116.69 -≤5.09/12/2006 N/A N/A Crawford Canal 69.4 8.3 207.5 3.1≤50 0.027 I≤0.0077≤0.13 -≤2.01 0.85 I≤156.67 -≤17.40 0.34 I≤8.06 2.1 I≤96.72 -≤5.09/27/2006 N/A N/A Crawford Canal 78.0 9.7 234.7 2.6≤50 -≤0.0077≤0.13 -≤2.22 0.35 I≤173.33 4.40≤19.34 0.25 I≤9.43 2.4 I≤107.36 -≤5.010/31/2006 N/A N/A Crawford Canal 77.4 10.8 237.7 2.1≤50 -≤0.0077≤0.13 -≤2.24 -≤175.16 3.75≤19.55 -≤9.58 -≤108.53 -≤5.0ntial0 1/30/2006 9:53 1/31/2006 Hickey Creek80.4 A 11.7 A 248.9 1.7 I≤50 -≤0.0077≤0.13 -≤2.32≤181.89 n/a≤20.34 0.12 I≤10.16 0.73 I≤112.84 -≤5.01/31/2006 9:52 2/1/2006 Hickey Creek77.1 11.6 240.3 1.2 I≤50 -≤0.0077≤0.13 -≤2.26≤176.69 -≤19.73 0.10 I≤9.71 1.4 I≤109.51 -≤5.00 2/27/2006 8:40 2/28/2006 Hickey Creek78.6 12.0 245.7 1.3 I≤50 -≤0.0077≤0.13 -≤2.30≤179.94 0.70 I≤20.11 0.10 I≤9.99 1.4 I≤111.59 -≤5.00 2/28/2006 8:30 3/1/2006 Hickey Creek69.3 11.2 219.2 1.5 I≤50 -≤0.0077≤0.13 -≤2.10≤163.87 0.87 I≤18.24 0.13 I≤8.64 1.3 I≤101.31 -≤5.05 3/27/2006 8:50 3/28/2006 Hickey Creek49.2 9.7 162.8 1.7 I≤50 -≤0.0077≤0.13 -≤1.66≤128.45 -≤14.15 0.31≤5.92 1.4 I≤78.78 -≤5.00 3/28/2006 9:00 3/29/2006 Hickey Creek54.6 10.5 179.6 1.6 I≤50 -≤0.0077≤0.13 -≤1.80≤139.20 -≤15.38 0.23 I≤6.70 -≤85.60 -≤5.01 4/25/2006 7:41 4/26/2006 Hickey Creek58.1 11.5 192.4 2.2≤50 -≤0.0077≤0.13 -≤1.90U≤147.31 0.96 I≤16.32 0.16 I≤7.32 1.8 I≤90.75≤5.00 5/22/2006 7:20 5/23/2006 Hickey Creek50.4 11.1 171.6 2.4≤50 -≤0.0077≤0.13 -≤1.73 0.89 I≤134.09 1.07≤14.80 -≤6.32 -≤82.35 -≤5.05 5/23/2006 7:45 5/24/2006 Hickey Creek55.2 12.0 187.3 2.7≤50 -≤0.0077≤0.13 -≤1.86U≤144.05 0.96≤15.94 -≤7.07 -≤88.68 -≤5.06 6/19/2006 8:26 6/20/2006 Hickey Creek53.9 11.9 183.6 3.5≤50 -≤0.0077≤0.13 -≤1.83 0.49 I≤141.74 1.40 I≤15.68 -≤6.89 -≤87.21 -≤5.00 6/20/2006 7:40 6/21/2006 Hickey Creek52.9 11.5 179.4 3.0≤50 -≤0.0077≤0.13 -≤1.80 0.43 I≤139.12 1.47≤15.38 -≤6.70 -≤85.55 -≤5.05 7/24/2006 8:29 7/25/2006 Hickey Creek76.7 10 232.7 2.7≤50 -≤0.0077≤0.13 -≤2.20 0.32 I≤172.11 0.45 I≤19.20 -≤9.32≤106.58≤5.00 7/25/2006 8:47 7/26/2006 Hickey Creek81.1 10.4 245.3 2.6≤50 -≤0.0077≤0.13 -≤2.29 0.81 I≤179.73 0.69 I≤20.09 -≤9.97 -≤111.45 -≤5.05 9/11/2006 8:45 9/12/2006 Hickey Creek83.5 10.7 252.6 3.5≤50 -≤0.0077≤0.13 -≤2.35 -≤184.05 -≤20.59 -≤10.35 1.0 I≤114.23 -≤5.00 9/12/2006 8:30 9/13/2006 Hickey Creek84.3 10.5 253.7 4.4≤50 0.058 I≤0.0077≤0.13 -≤2.36 2.55 I≤184.75 1.14≤20.67 0.78 I≤10.41 2.0 I≤114.68 -≤5.00 9/25/2006 8:10 9/26/2006 Hickey Creek94.6 11.3 282.7 2.6≤50 -≤0.0077≤0.13 -≤2.57 -≤201.88 -≤22.68 -≤11.95 -≤125.67 -≤5.05 10/30/2006 8:15 10/31/2006 Hickey Creek79.1 11.1 243.2 1.9 I≤50 -≤0.0077≤0.13 -≤2.28 0.40 I≤178.46 1.34≤19.94 -≤9.86 -≤110.64 -≤5.02 10/31/2006 7:22 11/1/2006 Hickey Creek80.4 11.2 246.9 1.9 I≤50 -≤0.0077≤0.13 -≤2.31 -≤180.66 0.81≤20.19 -≤10.05 -≤112.05 -≤5.01 1/30/2006 8:53 1/31/2006 Townsend Canal 49.6 9.5 163.0 2.4≤50 -≤0.0077≤0.13 -≤1.66≤128.57 n/a≤14.16 0.38≤5.92 0.89 I≤78.85 -≤5.01/31/2006 9:02 2/1/2006 Townsend Canal 46.9 9.0 154.2 1.6 I≤50 -≤0.0077≤0.13 -≤1.59≤122.85 -≤13.50 0.36≤5.52 1.8 I≤75.23 -≤5.03 2/28/2006 7:53 3/1/2006 Townsend Canal 44.0 9.0 146.9 1.3 I≤50 -≤0.0077≤0.13 -≤1.53≤118.11 1.23≤12.96 0.46≤5.19 1.5 I≤72.23 -≤5.00 3/1/2006 8:00 3/2/2006 Townsend Canal 45.6 9.1 151.3 1.6 I≤50 -≤0.0077≤0.13 -≤1.57≤121.00 1.38≤13.29 0.33≤5.39 2.1 I≤74.06 -≤5.03/27/2006 10:10 3/28/2006 Townsend Canal 49.5 9.6 163.1 1.9 I≤50 -≤0.0077≤0.13 0.050 I≤1.67≤128.67 -≤14.17 0.27 I≤5.93 1.2 I≤78.92 -≤5.03/28/2006 9:40 3/29/2006 Townsend Canal 46.4 9.6 155.4 1.6 I≤50 -≤0.0077≤0.13 -≤1.60≤123.65 -≤13.60 0.28 I≤5.58 -≤75.74 -≤5.07 4/25/2006 8:37 4/26/2006 Townsend Canal 43.9 9.8 150.0 1.9 I≤50 -≤0.0077≤0.13 -≤1.56 1.3 I≤120.11 1.23≤13.19 0.28 I≤5.33 1.2 I≤73.50 -≤5.00 5/22/2006 7:50 5/23/2006 Townsend Canal 45.1 10.4 155.4 2.2≤50 -≤0.0077≤0.13 -≤1.60 0.76 I≤123.68 1.26≤13.60 0.28 I≤5.58 -≤75.76 -≤5.00 5/23/2006 8:30 5/24/2006 Townsend Canal 46.4 10.5 159.1 2.6≤50 0.025 I≤0.0077≤0.13 0.054 I≤1.63 0.88 I≤126.06 1.66≤13.87 0.34 I≤5.75 -≤77.26 -≤5.05 6/19/2006 8:55 6/20/2006 Townsend Canal 53.5 10.8 178.1 3.0≤50 -≤0.0077≤0.13 -≤1.78 0.45 I≤138.24 1.47 I≤15.27 -≤6.63 -≤84.99 -≤5.05 6/20/2006 8:15 6/21/2006 Townsend Canal 52.5 A 10.5 A 174.3 3.0 A≤50 -≤0.0077≤0.13 -≤1.75 0.38 I≤135.86 1.25 A≤15.00 -≤6.46 -≤83.48 -≤5.07/24/2006 9:20 7/25/2006 Townsend Canal 63.1 9.3 195.9 3.5≤50 -≤0.0077≤0.13 0.067 I≤1.92 0.67 I≤149.45 7.80≤16.57 -≤7.49 -≤92.12 -≤5.01 7/25/2006 9:23 7/26/2006 Townsend Canal 69.6 10 215.0 3.8≤50 -≤0.0077≤0.13 -≤2.07 0.37 I≤161.30 6.04≤17.94 -≤8.43 -≤99.67 -≤5.03 9/12/2006 9:00 9/13/2006 Townsend Canal 65.3 9.1 200.5 3.2≤50 -≤0.0077≤0.13 -≤1.96 -≤152.37 3.40≤16.91 0.26 I≤7.71 2.0 I≤93.97 -≤5.00 9/13/2006 8:20 9/14/2006 Townsend Canal 59.1 8.3 181.8 5.4≤50 -≤0.0077≤0.13 -≤1.81 -≤140.58 5.02≤15.54 -≤6.81 1.4 I≤86.47 -≤5.05 9/25/2006 8:47 9/26/2006 Townsend Canal 74.5 10.0 227.2 2.7≤50 -≤0.0077≤0.13 -≤2.16 0.41 I≤168.78 1.77 I≤18.81 -≤9.04 1.6 I≤104.45 -≤5.00 9/26/2006 8:00 9/27/2006 Townsend Canal 63.0 7.5 188.2 2.2≤50 -≤0.0077≤0.13 -≤1.86 0.33 I≤144.65 1.28 I≤16.01 -≤7.12 1.5 I≤89.06 -≤5.06 10/30/2006 8:49 10/31/2006 Townsend Canal 74.4 9.5 224.9 1.8 I≤50 -≤0.0077≤0.13 -≤2.14 0.39 I≤167.37 1.53≤18.65 -≤8.93 -≤103.55 -≤5.07 10/31/2006 7:57 11/1/2006 Townsend Canal 76.1 9.8 230.4 1.9 I≤50 -≤0.0077≤0.13 -≤2.18 0.65 I≤170.70 1.58≤19.03 -≤9.21 1.1 I≤105.68 -≤5.0ow the method detection limit (MDL)icate samplesminimum quantitation limit, and greater than or equal to the minimum detection limittwo or more determinationsFAC 62-302Class I/IIIcalculatedcriteria μg/L copper μg/LFAC 62-302Class I/IIIcalculatedcriteria μg/LFAC 62-302Class Icriteria μg/LFAC 62-302Class IIIcriteria μg/Llead μg/LFAC 62-302Class I/IIIcalculatedcriteria μg/L nickel μg/LFAC 62-302Class I/IIIcalculatedcriteria μg/Lseleniumμg/LFAC 62-302Class I/IIIcriteria μg/L zcalciummg/Lof analytes (μg/L) above the method detection limit found in suface water samples.cadmiumμg/LFAC 62-302Class I/IIIcalculatedcriteria μg/Lmagnesiummg/Larsenicμg/LFAC 62-302Class I/IIIcriteria μg/Lberylliumμg/Lchromiumμg/L

# 17 Glossary

LD 50 

# : The dosage which is lethal to 50 percent of the terrestrial animals tested within a

short (acute) exposure period, usually 24 to 96 hours.

LC 50 

# : A concentration which is lethal to 50 percent of the aquatic animals tested within

a short (acute) exposure pe riod, usually 24 to 96 hours.

EC 50 

# : A concentration necessary for 50 percent of the aquatic species tested to exhibit a

toxic effect short of mortality (e.g., sw imming on side or upside down, cessation

of swimming) within a s hort (acute) exposure peri od, usually 24 to 96 hours.

K

oc 

# : The soil/sediment partition or sorption coefficient normalized to the fraction of

organic carbon in the soil. This value provides an i ndication of the chemical’s

tendency to partition between so il organic carbon and water.

Bioconcentration Factor:

The ratio of the concentration of a cont aminant in an aquatic organism to the

concentration in water, af ter a specified period of exposure via water only. The

duration of exposure should be sufficient to achieve a near steady-state condition.

Soil or water half-life:

The time required for one-half the concentration of the compound to be lost from

the water or soil under the conditions of the test.

Method Detection Limits (MDLs):

The minimum concentration of an analyt e that can be detected with 99 percent

confidence of its presence in the sample matrix.

Practical Quantitation Limits (PQLs):

The lowest level of quantitation that can be reliably achieved within specified

limit of precision and accuracy during rou tine laboratory oper ating conditions.

The PQL is further verified by analyzi ng spike concentrations whose relative

standard deviation in 20 fortified water sa mples is < 15 percent. In general, the

PQL is 2 to 5 times larger than the MDL.

# 18 References

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Database: II Using It With Soils Data In A Screening Procedure . Soil Conservation

Service. Fort Worth, TX.

Hartley, D. and H. Kidd. (Eds.) (1987). The Agrochemicals Handbook. Second Edition,

The Royal Society of Chemistry. Nottingham, England.

Johnson, W.W. and M.T. Finley. (1980). Handbook of Acute Toxici ty of Chemicals to

Fish and Aquatic Invertebrates . U.S. Department of the Interior, Fish and Wildlife

Service Resource Publica tion 137. Washington, DC.

Lyman, W.J., W.F. Reehl, a nd D.H. Rosenblatt. (1990). Handbook of Chemical Property

Estimation Methods . American Chemical Society, Washington, DC.

Mayer, F.L. and M.R. Ellersieck. (1986) Manual of Acute Toxici ty: Interpretation and

Database for 410 Chemicals and 66 Species of Freshwater Animals . United States Fish

and Wildlife Service, Publication No. 160.

Montgomery, J.H. (1993). Agrochemicals Desk Reference: Environmental Data . Lewis

Publishers. Chelsa, MI.

United States Environmental Protection Ag ency (1984). Chemical Fact Sheet for

Simazine. March, 1984.

_____ (1988). Chemical Fact Sheet for Hexazinone. September, 1988.

_____ (1991). Pesticide Ecological Effects Data base, Ecological Effects Branch, Office

of Pesticide Programs, Washington, DC.

_____ (1996). Drinking Water Regulations and Health Advisories . Office of Water. EPA

822-B-96-002.

_____ (2003). Ambient Aquatic Life Water Crit eria for Atrazine. Revised Draft EPA822-R-03-023. October 2003.

_____ (2005). Aldicarb Ecological Risk Assessment. May 31, 2005.

Verschueren, K. (1983). Handbook of Environmental Data on Organic Chemicals

. Second Edition, Van Nostrand Rein hold Co. Inc. New York, NY