CPZY) A 

DISSOLVED PESTICIDE DATA FOR 

THE SAN JOAQUIN RIVER AT VERNALIS 

1 I 

I AND THESACRAMENTORIVER AT 

SACRAMENTO, CALIFORNIA, 

I 1991-94 

Prepared in cooperation with the 

U.S. ENVIRONMENTAL PROTECTION AGENCY and the 

CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD 
DISSOLVED PESTICIDE DATA FOR THE SAN JOAQUIN 

RIVER AT VERNALIS AND THE SACRAMENTO RIVER AT 

SACRAMENTO, CALIFORNIA, 1991 -94 

By Dorene MacCoy, Kathryn L. Crepeau, and Kathryn M. Kuivila 

U.S. GEOLOGICAL SURVEY 

Open-File Report 95-1 10 

Prepared in cooperation with the 

U.S. ENVIRONMENTAL PROTECTION AGENCY and the 

CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD 

Sacramento, California 

1995 
.. 1 Abstract ................................................................ 1 

Introduction ............................................................ 1 

Sample Collection. Processing. and Analysis ... : ..... : .............. !;............. 3 

Quality Assurance ....................................................... 3 

Compilation of Data ......................... :! . : ........................... 3 

References Cited .. ; ...................................................... 4 

FIGURE 

I.' Map showing location of study area and sampling sites in the Central Valley. 

California ...................................................... 2 

. , i ' 

TABLES ' . 

1 . Method detection limits for the original hdytical method calculated a; the 50-nanogramper-liter concentration and for the modified analytical method calculated at the 

100-nanogram-per-liter concentration ..................................... 5 

2-5 . Pesticide concentrations in water samples from the San Joaquin River at Vernalis. 

California: 

2 . January through ~e~ternbei 1991 ..................................... 5 

3 . October 1991 through September 1992 ................................ 8 

I 4 . October 1992 through September 1993 ................................ 11 

1 5 . October 1993 through April 1994 ..................................... 15 

6-9 . Pesticide concentrations in water samples from the Sacramento River at Sacramento. . . ' California: 4 

6 . May through September 1991 ...................................... 18 

7 . October 1991 through September 1992 ................................ 19 

8 . October 1992 through September 1993 ................................ 21 

9 . October 1993 through April 1994 .................................... 26 

Contents Ill 
DISSOLVED PESTICIDE DATA FOR THE SAN JOAQUIN 

RIVER AT VERNALIS AND THE SACRAMENTO RIVER AT 

SACRAMENTO, CALIFORNIA, 1991 -94 

By Dorene MacCoy, Kathryn L. Crepeau, and Kathryn M. Kuivila 

Abstract 

Water samples were collected from sites on the San Joaquin and Sacramento Rivers, 

California and were analyzed for dissolved organic pesticides. This data collection and 

analysis are a part of an ongoing project by the U.S. Geological Survey Toxic Contaminants 

Hydrology program to determine the fate and transport of organic pesticides that enter the 

Francisco Bay Estuary, Concentrations of selected pesticides were measured in filtered water 

samples using solid-phase extraction and gas chromatograph-mass spectrometry at the U.S . Geological Survey organic chemistry laboratory in Sacramento. 

INTRODUCTION 

The San Francisco Bay Estuary, one of the most economically and ecologically important 

estuarine systems in the Nation, receives a broad range of agricultural organic pesticides that vary 

widely in their environmental behavior, sources, seasonality, and toxicity. The drainage system of the 

estuary includes the Central Valley of California (fig. I), most of which is imgated and intensively 

farmed for a diverse group of crops. Agriculture in the Central Valley accounts for 10 percent of the 

total pesticide use in the United States-20,000 tons annually and over 500 different organic 

compounds (Wright and ~hillips, 1988). 

Little is known about the timing or actual amounts of pesticides that enter the estuary. To gain a 

better understanding of the transport, transformation, and ultimate fate of pesticides within the estuary, 

the U.S. Geological Survey (USGS) began'the San Francisco Bay Estuary Toxic Contaminants Project 

in 1990. 

Two rivers, the Sacramento and the San Joaquin, drain most of the Central Valley and account for 

the largest loads of pesticides to the San Francisco Bay Estuary. Water samples were collected 

routinely at two sites, one on the San Joaquin River at Vernalis and one on the Sacramento River at 

Sacramento, and were analyzed for selected dissolved pesticides. The site at Vernalis, a long-term 

USGS water-quality station, is downstream of most other riverine inputs from the San Joaquin Valley, 

and the site at Sacramento is downstieam of most other riverine inputs from the Sacramento Valley. 

This report presents a compilation of the dissolved pesticide data collected at Vernalis and at 

Sacramento. Water samples were collected routinely at Vernalis beginning in January 1991 and at 

Sacramento beginning in May 1991. Sample collection continued at both sites through April 1994: 

The samples were analyzed for concentrations of selected pesticides, and the resuIts of the analyses 

were compiled. 

Introduction 1 
0 12 MILES 8 ,,t,~,b,a I , 0 4 8 12 KILOMETERS 

Figure 1. Location of study area and sampling sites in the Central Valley, California. 

The authors would like to thank Joe ~oma~alsldof the U.S. ~eolo~ical Survey for his help in 

setting up the analytical method in the Sacramento laboratory and Kathy ,Hui for her endless hours of 

data entry. A special thanks is given to the USGS observer, Mark Pombed who faithfully collected a 

water sample from the San Joaquin River at Vernalis every day during the 4-year period of data 

collection. 

' 8 

2 Dissoived Pestlclde Data, San Joaquln River at Vernalis and Sacramento River,at ~acramento,'1991-94 
JAL- v.fjf * - 

+F 

SAMPLE COLLECTION, PROCESSING, AND ANALYSIS 3 ",A, - d1.3 IWater samples were collected at Vernalis near the center of flow using a D-74 depth-integrating, 

discharge-weighting sampler designed to provide a representative sample of the average suspendedsediment concentration for a river cross section (Porterfield, 1992). Samples collected during 2 or 

more consecutive days usually were combined for analysis. During critical sampling periods such as 

during periods of rainfall, water samples collected during a single day were analyzed. 

Water samples were collected from the Sacramento River and processed singly. These samples 

were collected three times a week at a point in the river near the center of flow, which under normal 

flow conditions is representative of a cross sec!ion. Two different .sample collectors were used at the 

Sacramento River site. From May 10, 1991, through November 20, 1991, the samples were collected 

using a specially designed two-bottle sampler that was weighted with a 15-pound brass fish and was 

built to hold two 1-liter amber glass bottles. From November 20, 1991, through April 30, 1994, a 

D-77 depth-integrating, discharge-weighting sampler equipped with a Teflon bottle and nozzle was 

used to collect the samples. 

All water samples were, filtered through a baked 0.7-micron glass-fiber filter, and the pesticides 

were extracted using C-8 solid-phase extraction cartridges. A surrogate compound, terbuthylazine, was 

added before extraction to provide quantitative data on the efficiency of the extraction. The cartridges 

were dried with carbon dioxide and,then eluted with hexane:diethyl ether (1:l). The eluant was 

concentrated and analyzed using gas chromatography/rnass spectometry (GCIMS). 

Initially, water samples collected from the Sacramento River at Sacramento were analyzed only for 

pesticides used on rice, a major crop in the Sacramento Valley. In contrast, water samples collected 

frdm the San Joaquin River at Vernalis were analyzed for a large suite of pesticides. Beginning in 

August 1991, the water samples collected at both sites were analyzed for the same suite of pesticides. 

Other pesticides were added to the analysis during the course of the study as additional information on 

pesticide usage in the Central Valley became available. Water samples collected from January 1991 

through September 1992 were processed and analyzed using one analytical method, and those samples 

collected from October 1992 through April 1994 were processed and analyzed using a modified 

analytical method. The modifications included reducing the volume of water extracted and adding ~/tI?i - 

internal standards for quantification of the pesticides. Details of the analytical and modified analytical 4/1719q 

methods, including accuracy and precision of data, are described by.Crepeau and others (1994). 

QUALITY ASSURANCE 

Equipment blanks, replicate samples, matrix spikes, and surrogate recovery were the types of 

quality-control data collected. The equipment blanks were processed about every 20 samples and at 

the beginning and end of intensive sampling. None of the pesticides analyzed for were detected in the 

equipment blanks. Replicate samples constituted about 10 percent of the samples analyzed and were 

within 25 percent agreement for each of the pesticides detected. Matrix spikes of all the analytes were 

checked on a regular basis after the method had been validated (Crepeau and others, 1994). Recovery 

of the surrogate, terbuthylazine, was recorded to assess the efficiency of each extraction. The average 

percent recovery and standard deviation for .terbuthylazine was calculated for each year. Sample data 

were excluded if the recovery of terbuthylazine was outside the warning limit; that is, the annual mean 

1.5 standard deviations. 

COMPILATION OF DATA 

The method detection limits determined for each pesticide using the original or modified method M p LJ 

are given in table 1 (at back of report). Pesticide data collected from the San Joaquin River at C" 

Vernalis are presented in tables 2 through 5 (at back of report), and pesticide data collected from the 

Compilation of Data 3 
Sacramento River at Sacramento are presented in tables 6 through:9 (at backof Ireport). The method 

detection limits are dependent on both the matrix and the,pesticide and were determined using the 99- 

percent confidence level. Pesticide concentrations below' the method detection1 limit are in parenthesis 

in the data tables because these values are estimates. 

I I 

I 

REFE~NCES CITED 

I I 

crepe&, K.L., Domagalski, J.L., and ~uibqa, K.M., 1994, Methods of analysis and quality-assurance 

1 practices of the U.S. Geological Survey Organic Laboratory, Sacramepto, California-- 

,Determination of pesticides in water by solid-phase extraction and capillary-column gas 

chromatography/mass spectrometry: U.S. Geological Survey Open-File Report 94-362, 17 p. 

Porterfield, George, 1992, Computation\of fluvial-sediment discharge: U.S. ~eolo~ical Survey 

I Techniques of Water-Resources Investigations, Book 3, Chap. C3. 66p. I 

Aright, D.A., and Phillips, D.J.H., 1988, khesapeake and San Francisco Bays--A study in contrasts 

and parallels: Marine Pollution qlletin, v. 19, p.. 405-413. 

I I i 

I 

I, 

4 Disboived Pesticide Data, San Joaquln River at Vernalis and Sacrarnento,River at sicramento, 1991-94 

I 
Table 1. Method detection limits for the original analytical method calculated at the SO-nanogram-per- ppt liter concentration and for the modified analytical method calculated at the 100-nanogram-per-liter 

concentration 

[Values are in nanogks per liter. --, not included in original method] 

Sacramento River water San Joaquin River water 

Pesticide l($/-.qpt lo 92 - Y/~Y I 91 - ~{PL ~o($L - c/lg y 

0ng/nal dditied driginal Modified 

~pta* E4TG -- 38- -- .I29 

~utylate' -- 44 -- 

-- 

,019 

-- Pebulate -. - . - _ - --_ - -- _-_ . .6 50 ,044d 

Molinate ~4 .025. .I10 ,038 .653 V' 

~~h~lfl&' 03-1 66 -- is -- .I) 310 

i ~trazine 22 47 

Terbuthylazine2 030 0 Y 

35J 

13 50 28 

Fonofos' - -. -. . . . .- 19 28 

Diazinon d-ld 

22 J 

-- 44 -- - Diazinon I ?I - Carbaryl lr7.5- 

~lachlor' 

Thiobencarb -- r 9 3 3 

~alathion' 36 7- 

Metolachor I 'f'b 

Cvanazine 0 1 L40 

Methidathion l I B 7 3 1. 31. .628 28 v-' 

~apropamide' -- 47 -- 28 V' 

'Compound analyzed for but not detected. 2 2. QL. - .L&&.J & Gmm,c-*f 'Surrogate compound. &&p~w d -'LO 

n14~~/ Tc-rc Xieh 

~eble-2. Pesticide concentrations in water samples from the San Joaquin River at Vernalis, California, 

January through September 1991 

[Original analytical method used for analysis. Values are in nanograms per liter. Water samples were analyzed 

for the following pesticides, but none were detected: atrazine, ,chlorpyrifos, fonofos, malathion, and trifluralin. 

nd, nondetection; --, not analyzed for; ( ), concentration below detection limit] 

Date Simazine, Carbofuran , Diazinon , Thiobencarb 

nd nd 39 4 -- 

nd 42 -- 

nd 40 -- 

nd (32) -- 

1/21-22 nd 44 -- 

1/23-24 253 nd 102 -- 

1/25-26 143 nd 38 . -- 

1/27-29 119 nd (34) -- 

1MO-3 1 (71) nd (32) -- 

U1-2 83 nd (36) -- 

2J3 315 nd 6 1 -- 

U4 283 nd 65 -- 

2/5 290 nd 75 -- 

2/6 426 nd 71 -- 

2/7-8 287 nd (29) -- 

2/9-10 (72) rid (23) -- 

2/11-12 (54) nd (24) -- 

2/14 (43) nd (17) -- 

Table 2 5 
Table 2. Pesticide concentratidris'in water samples from the San Joaquin River at Vernalis, California, 

January through. September 1991--Continued 

Date Simazine Carbofuran Diazinon Thiobencarb 

; -lnd 

, , (23) 

(25) 

; (14) 

(18) 

nd 

. nd 

nd 

nd 

41 

nd 

nd 

(19) 

(18) 

(13) 

nd 

(14) 

nd' 

nd 

nd 

6 ~issoiied Pesticide Data, San Joaquin River at Vernalis and sacramento ~iMr at Sacrhmento. 1991-94 
lable 2. Pesticide concentrations in water samples from the San Joaquin River at Vernalis, ~aiifornia, 

January through September 1991 --Confinued 

Date Simazine Carbofuran . Diazinon Thiobencarb 

6/15-16. (19) nd nd nd 

6/19-20, nd nd nd nd 

Table 2 7 
ÿ able 3. Pesticide concentrations in water samples from the San Joaquin River at1 Vernalis, California, 

October 1991 through September 1992 

[Original analytical method used for analyss. Values are in nanograms per liter. Water samples we& analyzed 

for the following pesticides, but none were detected: atrazine, chlorpyrifos, fonofos,, malathion, molinate, and 

trifluralin. nd, nondetection; ( 1, concentration below detection limit1 

Date Simazine , Carbofuran, Diazinon Carbaryl Thiobencart) Methidathiop 

1991 J J J / J h/ 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

,nd 

nd 

,nd 

'nd 

nd 

'nd 

nd 

;nd 

nd 

nd 

' nd 

nd 

nd 

nd 

' nd 

nd 

nd 

nd 

nd 

nd 

nd' 

nd 

nd 

,' rid 

nd 

: nd 

nd 

nd 

' nd 

nd 

! nd 

nd 

nd 

nd 

I nd 

nd 

nd 

nd: 

nd' 

nd 

nd', 

(23) 

(14) 

nd 

nd. 

nd 

nd 

nd 

nd 

nd 

(12) 

(18) , 

nd 

nd 

nd 

n4 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

lid, 

nd 

nd, 

nd 

nd 

nd 

nd 

rid 

. nd 

(17) 

nd 

nd 

nd 

(12) 

I 'nd 

nd 

I nd 

nd 

nd 

nd 

nd 

6 8 Dissolved Pesticide Data, San Joaqutn River at Vernalis and sacramento River at Sacramento, 1991-94 ,. , 
Table 3. Pesticide concentrations in water samples from the San Joaquin River at Vernalis, California, 

October 1991 through September 1992--Continued 

Date 

&dl 47 

Simazine Carbofuran Diazinon Carbaryl Thiobencarb Methidathion 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

'nd 

nd 

nd 

nd 

nd 

nd 

(27) 

nd 

(21) 

nd 

nd 

nd 

nd . 

nd 

nd 

nd 

nd 

nd 

Table 3 9 
Table 3. Pesticide concentration's*in water samples from the San Joaquin River at Vernalis, California, 

October 1991 through September 1992--Continued 

Date Simazine Carbofuran Diazinon Carbaryl T$io&ncarb Methidathion 

1992--Continued 

10 Dissolved Pesticide Data, San Joaquin River at Vernalis and Sacramento River at sacramento, 1991-94 
Table 3. Pesticide concentrations in water samples from the San Joaquin River at Vernalis, California, 

October 1991 through September 1992--Continued 

Date Simazine Carbofuran Diazinon Carbaryl Thiobencarb Methidathion 

- 

1992--Continued 

9/18-19 (23) nd nd nd nd nd 

9/20-21 (19) nd nd nd nd nd 

9124-25 (16) nd nd nd nd nd 

9/26-27. (14) nd nd nd nd nd 

p3 9/28-29 (17) nd nd nd nd nd 

Table 4. Pesticide concentrations in water samples from the San Joaquin River at Vernalis, California, 

October 1992 through September 1993 

[Modified analytical method used for analysis. Values are in nanograms per liter. Water samples were analyzed 

for the following pesticides, but none were detected: alachlor, atrazine, butylate, fonofos, malathion, 

napropamide, pebulate, and trifluralin. nd, nondetection; 1-, not analyzed for; ( ), concentration'below detection 

limit] 

Moli- Sima- Carbo- Diaz- Car- Thio- Meto- Cyana- Chlor- Dact- MethiDate Eptam nate zinc furan inon baryl bencarb lachlor zine pyrifos hal, dathion 

Table 4 11 
Table 4. Pesticide concentrations in water samples from the San Joaquin River at Vernalis, California, 

October 1992Jhrough September 1993--Continued 

. \%a '' Moli- Sima- Carbo- ' Diaz- Car- "I'hio- Meto- Cyana- Chlor- Dact- MethiDate Eptam nate zine furan inon buy1 bencarb lachlor rine pyrifor ha1 dathion 

1992--Continued 

12/20 -- nd 257 nd (13) nd nd -- -- nd -- nd 

12/22-23 -- nd 92 nd (19) nd nd -- -- nd -- 70 

12/24-25 -- nd 68 nd (20) nd nd -- -- nd -- (21) 

12/26-27 -- nd 87 nd (23) nd nd -- -- nd -- nd 

12/28-29 -- nd 66 nd (16) nd nd -- -- nd -- nd 

1U30-31 -- nd 150 nd 48 (30) nd -- -- nd -- nd I 

1993 

111-2 -- nd 84 nd (28) 51 nd -- -- nd -- nd 

113-4 -- nd 208 nd 40 34 nd -- -- nd -- 52 

115 -- nd 74 nd (19) nd nd -- -- nd . -- 34 

116 -- nd 204 nd 36 nd nd -- -- nd -- nd 

1n -- nd 176 nd (12) nd nd -- -- -nd -- nB 

118 -- nd 174 nd 77 nd nd -- -- nd -- nd 

119 -- nd 407 nd 173 nd nd -- -- nd -- nd 

1/10 -- nd 595 nd 319 nd nd -- -- , nd -- nd 

1/11 -- nd 379 nd 151 nd nd -- -- nd -- 38 

1/12 -- nd 253 nd 165 nd nd -- -- nd -- nd 

1/13 -- nd 301 nd 189 (16) nd -- -- nd -- (13) 

2 l/i4 nd nd 159 nd 283 nd nd nd -- nd 91 nd 

1/15 nd nd 226 nd 395 nd nd nd -- nd (29) (13) 

1/16 nd nd 280 nd , 295 nd nd nd -- nd (34) (13) 

1/17 nd nd 146 nd 126 nd nd nd -- nd (19) nd 

1/18 nd nd 163 nd 89 nd nd nd -- nd (52) nd 

1/19 nd nd 288 nd 211 nd nd nd -- nd (26) nd 

1/20 nd nd 272 nd 195 nd nd nd -- nd (20) nd 

1/21 nd nd 216 nd, 100 nd , nd nd -- nd (20) nd 

1/22 nd nd 224 nd 100 nd nd nd -- nd (13) nd 

1/23 nd nd 220 nd 183 nd nd nd -- nd (16) nd 

1/24 nd nd 140 nd 128 nd nd nd -- nd (14) nd 

1/25 nd nd 137 nd 66 nd nd nd -- nd (10) nd 

1/26 nd nd 302 nd 92 nd nd nd I -- nd (24) nd 

1/27 nd nd 215 nd 87 nd nd nd I -- nd (10) nd 

1/28 nd nd 129 nd 77 nd nd nd -- nd nd nd 

1/29 nd nd 132 nd 58 nd nd nd -- nd nd nd 

1/30 nd nd 155 nd 70 nd nd nd -- nd nd nd 

113 1 nd nd 138 nd 59 nd nd nd -- I nd nd nd 

21 1 nd nd 163 nd 70 nd nd nd -- nd (11) nd 

213 nd nd 122 nd 80 nd nd nd -- nd nd nd 

214 nd nd 108 nd 50 nd nd nd -- nd nd (15) 

2/5 nd nd 128 nd 90 nd nd nd -- nd nd nd 

2/6 nd nd 74 nd 71 nd nd nd -- nd nd nd 

217 nd nd 95 nd 70 nd nd nd -- (12) nd nd 

2/8 nd nd 103 nd 452 nd nd nd -- nd nd nd 

219 nd nd 733 nd 714 195 nd (20) -- nd 181 90 

2/10 nd nd 492 nd 280 146 nd nd -- (12) (33) 586 

211 1 nd nd 844 nd 582 197 nd nd -- (16) (39) 116 

2/12 nd nd 455 nd 591 (27) nd nd -- 43 (17) 93 

2/13 nd nd 284 nd 335 nd nd nd -- (24) (11) 66 

2/14 nd nd 247 nd 296 nd nd nd -- (23) (45) 64 

2/15 nd nd 248 nd 293 nd nd nd -- nd (22) 66 

2/16 nd nd 123 nd 159 nd, nd nd - nd nd 52 

2/17 nd nd 229 nd 164 nd nd nd -- nd (18) 59 

2/18 nd nd 229 nd ' 138 nd nd nd -- nd (21) 31 

12 Dissolved Pesticide Data, San Joaquin RIver at Vernalis and Sacramento River at Sacramento, 1991-94 
Table 4. Pesticide concentrations in water samples from the San Joaquin, River at Vemalis, California, 

October 1992 through September 1993--Continued 

\ 

Moli- Sima- Carbo- Diaz- Car- Thio- Meto- Cyana- Chlor- Dact- MethiDate Eptam nate zine furan inon baryl bencarb lachlor zine. pyrifos ha1 dathion 

rued 

nd 356 nd 

nd 187 nd 

nd 238 nd 

nd 226 nd 

nd 194 nd 

nd 141 nd 

nd 232 nd 

nd 339 nd 

nd 431 nd 

nd 324 nd 

nd 357 nd 

nd 275 nd 

nd 219 nd 

nd 172 nd 

nd 157 nd 

nd 157 nd 

nd 164 nd 

nd 180 nd 

nd 286 nd 

nd . 180 nd 

nd . 282 nd 

nd 218 nd 

nd ' 244 nd 

nd 212 nd 

nd 340 (16) 

nd 377 58 

nd 409 (14) 

nd 322 nd 

nd 314 (20) 

nd 258 (20) 

nd 277 (11) 

nd 262 nd 

nd 444 nd 

nd 361 nd 

nd 565 nd 

nd 665 nd 

nd 326 nd 

nd 320 nd 

nd 508 30 

nd 382 (23) 

nd 350 (24) 

nd 323 . (24) 

nd 23b (24) 

nd 239 (25) 

nd 217 (23) 

nd 202 (24) 

nd 155 nd 

nd 178 nd 

nd 175 nd 

nd 205 nd 

nd 130 nd 

nd 137 nd 

nd 133 nd 

nd 129 nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd' 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

, nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd . 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

(41) 

nd 

nd 

nd 

'nd 

nd 

.nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

Table 4 13 
Table 4. Pesticide concentratians.in water samples from the San Joaquin River at Vernalis, California, 

October 1992 through September 1993-Continued % i 

Moli- Sima- Carbo- Diaz- Car- Thio- Meto- Cyana- Chlor- Dact- MethiDate Eplam nate line furan inon baryl bencarb lachlor zine pyrifos ha1 dathion 

-- 

-- 

-- 

-- 

-- 

-* 

-- I 

-- 

-- 

-- 

-- 

-- 

nd 

nd 

nd I 

nd 

nd 

nd 

nd, 

nd' 

nd 

nd 

ndl ' 

nd 

nd 

nd 

nd 

nd 

nd . nd 

ndl 

nd 

nd 

nd 

nd ' 

nd 

nd 

nd I ndi 

nd 

nd 

nd 

nd 

nd 

nd 

(40) 1 

nd , nd 

nd 

54 I 79 

589 

163 

92 , 

14 Dissolved Pesticide Data, San Joaquln Rlver at Vernalls and Sacramento River at Sacramento, 1991-94 
r E P P r r P. r r r P €661 

ap!w uodpep piq ariy -rofi3e,el ~hq uou!z uwnj aujz $13 

-dolda~ -!rl]aH -pea -euaL=) a -n3 -ma -oqn=) -8~11s -nqad Ad3 a~va 

[1!w!1 uogTlap moIaq uo!~arlua~u~~ '(3 !uo!palapuou 'pu 'u!@m~u~ pua 'qn3uaqoyw 'alau!Iow 

'uo!qwpm 'sojouo~ 'so~!~ll&o,elq3 'a~vlll~nq 'au!za4t! '~qq31?,ele :pava)ap slam auou Inq sp!uraq3 %upo,ello~ aqi JOJ 

pazd~aw aiam sa~dwas la~a~ 'JalrI lad sue~3oueu u! an sanIvA -s~s61eue loj pasn poqlaw 1e3gL~ew paypom] 

PU PU PU 

PU PU PU 

PU PU PU 

PU PU ' PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU . PU PU 

PU PU PU . PU' PU PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU (SI) PU 

PU PU . PU 

PU PU PU 

PU PU PU 

PU PU PU 

PU PU (81) 

PU PU (6~) 

PU PU . ZS 

.PU PU (6~) 

PU PU (LEI 

PU PU 89 1 

PU PU ZCZ 

PU PU I SZ 

PU PU L t 

PU 

PU 

PU 

PU 

PU 

PU 

PU 

PU 

tzr) 

PU 

PU 

(61) 

(91) 

(LZ) 

(91) 

(12) 

tzz) 

59 

(62) 

8L 

osz 

8s 

Ot' 

6s 

SI I 

L6 

tcz) 

I E 

6P 

ZL 

€6 

66 

PU 

(6~) PU PU 06-6216 

89 PU PU 8Z-LZl6 

(ZS) PU 9SZ 92-SU6 

(8s) Pu (SE) PZ-CZ/6 

6L PU PU ZZ-1U6 

IL PU PU 02-6116 

6L PU (~6) 81-1116 

t8 PU PU 91-S116 

SL PU 8St tI-€116 

66 PU . (81) ZI-1116 

IL PU (82) 01-616 

81 PU (POT) 8-U6 

9L PU 669 9-516 

61 1 Pu (PO P-El6 

96' PU (PO 2-116 

86 PU (IS) 16-0€/8 

PL P U (Pz) 62-8218 

b9 PU (Pz) LZ9U8. 

PU PU (Et) SZ-PU8 

(6s) Pu ISZ EZ-ZZ/8 

(€S) PU 6EZ IZQU8 

(9E) Pu OLI . 6118 

(~9) PU (16) 81-1118 

(1s) PU (9t) 91-5118 

(19) PU (90 PI-€118 

(6s) PU (ZL) ZI-I118 

69 PU tL9 01-618 

99 PU (9~) ' 8-US 

€9 PU (PI) 9-S18 

L6 PU PU k6/8 

EL PU (ES) Z-118 - 

(LS) PU PU 65-8ilL-w 

(6s) PU (EZ) K9ZIL 

panutiuo3-xtj61 
Table 5. Pesticide concentrations in water samples from the San Joaquin River; at Vernalis, California, 

October 1993 through April 1994--Continued ' I 

Date Pebu- Sima- Carbo- Dia- Car- Meto- Cyana- : Dact- Methi- NapropEplam late zine furan Anon baryl lachlor zinc, ha1 dathion arnide 

1993--Continued 

nd nd (31) nd' 

nd nd (42) ndi 

nd nd (46) nd' 

nd nd nd nd 

nd nd nd nd 

nd nd nd nd 

nd nd nd nd 

nd nd nd nd 

nd nd nd nd 

nd nd nd nd 

nd nd nd nd 

nd nd nd nd 

nd nd nd nd 

nd nd 662 nd 

nd nd 556 nd 

nd nd 1,068 nd 

nd nd 901 nd 

nd nd 444 nd 

nd nd 472 nd 

16 Dissolved Pesticide Data, San Joaquin River at Vernalis and Sacramento River at Sacramento, 1091-94 
Table'5. Pesticide concentrations in water samples from the San Joaquin River at Vernalis, California, 

October 1993 through April 1994--Continued 

Date Pebu- Sima- Carbo- Dia- Car- Meto- Cyana- Dact- Methi- NapropEptam late zine furan zinon baryl lachlor zine ha1 . dathion amide 

1994--Continued 

113 1 nd nd 

2/l nd nd 

2f2 nd nd 

u3 nd nd 

2/4 nd nd 

2J5 nd nd 

U6 nd nd 

2/8 nd nd, 

j'6b -U9 nd nd 

2/10 nd nd 

2/l l nd nd 

2/12 nd nd 

2/13 nd -nd 

2/14 nd nd 

2/15 nd nd 

2/16 nd nd 

2/17 nd nd 

2/18 nd nd 

2/19 nd nd 

2/20 nd nd 

2/21 nd nd / 2/22 nd nd 

2/23 nd nd, 

2/24 nd nd 

2/25 nd nd 

U26 nd nd 

2/27 nd nd 

- 2/28 nd nd 

311-2 nd nd 

3/34 nd nd 

3/56 nd nd 

317-8 nd nd 

3/9- 10 nd nd 

3/11-12 nd nd 

3/13-14 nd nd 

3/17-18 nd nd 

3/19-20 nd nd 

3/2 1-22 nd nd 

3/23-24 nd nd 

3/27-28 . nd nd 

3/29-30 nd nd 

3/31-411 nd nd 

4/2-3 nd nd 

4/44 nd nd 

416-7 nd nd. 

4/9- 10 nd nd 

4/11-12 nd nd 

4/13-14 nd 1,046 

4/15-16 578 471 

4/17-18 C1189 444 

4/19-20 nd 651 

4/21-22 (44) 45 

4/23-24 (56) 62 

4/26-27 nd nd 

4/28-29 nd nd 

3~7 4/30 nd nd 

Table 5 17 
Table 6. Pesticide concentrations in water samples from the Sacramento River at Sacramento, 

California, May through September 1991 of' 

[0rigi;al analytical method used for analysis. Values are in nanograms per liter. W 

May through July were analyzed for the following pesticides but none were detected 

samples collected from August through September were analyzed for the following 

detectep: atrazine, carbaryl, chlorpyrifos, diazinon, fonofos, malathion, methidathion, simazine, and trifluralin. 

nd, nondetection; R, replicate sample; ( ), concentration below detection limit] ,,AS - 

Date b'8@ Molinate Carbofuran Thiobencarb ' Date Molinate Carbofuran Thiobencarb 

18 Dissolved Pestlclde Data, San Joaquln River at Vernalls and Sacramento River at Sacramento. 1991-94 
Table 7. Pesticide concentrations in water samples from the Sacramento River at Sacramento, 

California, October 1991 through September 1992 

[Original analytical method used for analysis. Values are in nanograms per liter. Water samples were analyzed 

for the following pesticides'but none were detected: carbaryl, chlorpyrifos, fonofos, malathion, methidathion, 

molinate, thiobencarb, and trifluralin. nd, nondetection; R, replicate sample; ( ), concentration below detection 

limit] &a 47 4I , 

Date Simazine Carbofuran 

10/2 nd 

10/2R nd 

1014 nd 

10n nd 

1019 nd 

10/9R . nd 

10111 nd 

10114 nd 

10116 nd 

10116R nd 

10118 nd 

10118R nd 

10121 nd 

10/23 nd 

JO/25 nd ER = nd 

1111 nd 

11 nd 

1116 nd 

11/6R nd 

1118 nd 

11/11 nd 

11113 nd. 

11/13R nd 

11115 nd 

11/18 (39) 

11/20 nd 

11125 nd 

11127 nd 

11/27R nd 

11/29 nd 

1212 nd 

1U4 nd 

124R nd 

1U6 nd 

luS (24) 

12/11 (19) 

1UlIR (19) 

1U13 nd 

12/16 nd 

12/23 (16) 

12/27 nd 

12/30 57 

Atrazine Diazinon Date Simazine Carbofuran Atrazine Diazinon 

1992 

it3 66 nd (15) nd 

1 I6 58 nd (17) (8) 

1 I8 (39) nd (9) nd 

1/8R 53 nd nd nd 

1/10 126 nd nd nd 

1/13 59 nd nd nd 

1/15 (43) nd nd nd 

1115R (20) nd nd nd 

1/17 79 nd nd 24 

it20 62 nd nd (15) 

1/22 nd nd nd 20 

1/29 (38) nd nd 40 

2/3 nd nd nd 68 

2/5 (19) nd nd 42 

2I5R (15) nd nd 24 

2tl (16) nd (17) 32 

2/10 (37) nd (13) 22 

2/12 130 nd 97 31 

2/14 158 nd 43 155 

2/19 67 nd (20) 65 

2/19R 75 nd (21) 62 

2/21 1 07 nd (20) 50 

2/24 nd nd nd 26 

u26 (19) nd nd 26 

V26R 51 nd 31 33 

2/28 (35) nd nd 29 

3/2 (40) nd nd 19 

314 (38) nd nd (12) 

3/4R (35) ' nd nd (14) 

316, (44) nd nd (12) 

3/53 83 nd (20) 57 

311 1 6 1 nd 

3111R 48 nd (20) 19 (12) (18) 

3/13 nd (24) nd 3 1 

3/16 (24) nd nd (11) 

3/18 nd nd nd nd 

3/20 70 (14) nd (12) 

3/23 49 (18) 33 (13) 

3/25 69 (20) (19) 

3/25R 61 (8) 

(18) (10) (11) 

3/27 (19) nd nd nd 

3/30 (19) nd nd nd 

411 (19) nd nd nd 

411R (21) nd nd nd 

, 1, \ 413 (19) nd nd nd 

Table 7 19 
Table 7. Pesticide concentrations in water samples from the Sacramento ~ivei'at Sacramento, 

California, October 1991 through September 1992--Continued 

9. * L t 

Date Simazine Carbofuran Atrazine Diazinon Date Simazine Carbofuran Atrazine Diazinon 

199%-Continued 1992-Continued 

416 nd I nd nd nd 4 718 nd (21) (21) nd 

418 nd nd nd nd 7/10 nd nd nd nd 

4/8R (17) nd nd (8) 7/15 nd nd nd nd 

4/10 (17) nd nd nd 7/17 ' nd nd' nd nd 

4/13 (28) nd (12) (15) 7/20 (21) nd nd nd 

4/15 (24) nd nd nd -7/22 nd nd nd nd 

4115R (31) nd nd nd 7/22R nd nd nd nd 

411 7 (24) nd nd nd 7/27 nd nd nd nd 

4/20 (16) nd nd nd 7/29 (16) nd nd nd 

4/22 (16) nd nd nd 7/29R nd nd nd nd 

4/22R (24) nd nd nd 7/3 1 nd nd nd nd 

4/24 nd nd nd nd 8/3 nd nd nd nd 

4/27 nd nd nd nd 815 nd nd nd nd 

4/29 (19) nd nd nd 8/5R nd nd nd nd 

4/29R nd nd nd nd 8t7 nd nd nd nd 

51 1 nd nd nd nd 8/10 nd nd nd nd 

514 nd nd nd nd 8/12 nd nd nd nd 

516 nd nd nd nd 8/12R nd nd nd nd 

518 nd nd nd nd 8/14 nd nd nd nd 

511 1 nd nd nd nd 811 7 nd nd nd nd 

511 3 nd nd nd nd 811 9 nd nd nd nd 

5/13R nd nd nd nd 81 19R nd nd nd nd 

5/15 nd nd nd nd 812 1 nd nd nd nd 

5/18 nd nd nd nd 8/24 nd nd nd nd 

5/20 nd nd nd nd 8/26 nd nd nd nd 

5/20R nd nd nd nd 8/26R nd nd nd nd 

5/22 nd nd nd nd 8/28 nd nd nd nd 

5/25 nd nd nd nd 813 1 nd nd nd nd 

611 nd nd nd nd 912 nd nd nd nd 

6B nd nd nd nd 9/2R nd nd nd nd 

6/3R nd nd nd nd 914 nd nd nd nd 

618 nd nd nd nd 9n nd (16) (16) nd 

6/10 nd nd nd nd 919 nd nd (8) nd 

61 1 OR nd nd nd , nd 9/9R nd nd (9) nd 

6/17 nd nd nd nd 911 1 nd rid nd nd 

6/17R nd nd nd nd 9/14 nd nd (10) nd 

6/19 nd nd nd nd 9/16 nd nd nd nd 

6/22 nd nd nd nd 9116R nd lnd nd nd 

6/24 nd nd nd nd 9/18 nd nd nd nd 

6/26 nd nd nd nd 912 1 nd nd nd nd 

6129 nd nd nd nd 9/23 nd nd nd nd 

71 1 nd nd nd nd 9123R nd nd nd nd 

7/1R nd nd nd nd 9/28 nd nd nd nd 

7M nd nd nd nd 9/30 nd Y nd nd nd 

716 nd nd nd nd L~ \9/30R nd nd nd nd 

20 ~issoived Pesticide Data, San Joaquin River at Vernalis find Sacramento ~lver'at Sacramento, 1991-94 
Table 8. Pesticide concentrations in water samples from the Sacramento River at Sacramento, 

California, October 1992 through September 1993 

[Modified analytical method used for analysis. Values are in nanograms per liter. Water samples collected from 

October through December 1992 were analyzed for the following pesticides but none were detected: carbaryl, 

chlorpyfifos, fonofos, malathion, and tiifluralin. Water samples collected from January through Septyber 1993 

were analyzed for the following pesticides but none were detected: alachlor, buwate, carbGl, chlorpyrifos, 

,cyanazine (not analyzed for the following pesticides in water samples collected from Janyary through April $2 1993). dacthal, eptam, fonofos, malathion, metolachlor, napropamide, pehulate, and bifluralin. nd, 

p R, replicate sample?( )), concentration below detection limit] 

- - 

Date Molinate Simazine Carbofuran Atrazine Diazinon Thiobencarb Methidathion 

1992 J J J . J 4 

1 012 nd nd nd nd nd 

J J nd nd 

Table 8 21 
Table 8. Pesticide concentrations in water samples from the Sacramento River at Sacramento, 

California, October 1992 through September 1993--Continued 

Date Molinate Simazine Carbofuran Atrazine Diazinon Thiobencarb Methidathion 

1993 I 

1 104 nd 1 48 nd nd nd nd nd 

1 I06 nd (46) nd nd nd nd nd 

1 108 nd 189 nd (36) nd nd nd 

1108R nd 128 nd (31 ) nd nd nd 

111 1 nd 1 57 nd nd (26) nd nd 

1/12, nd 93 nd (1 5) (1 4) nd nd 

1/12 nd 88 nd (23) (15) nd nd 

1/13 nd 9 1 nd nd (22) nd nd 

1 I1 3R nd 83 nd (26) (23) nd nd 

1/15, nd 92 nd (1 6) (20) nd nd 

1/15 nd 88 nd nd (20) nd nd 

1/17 nd 104 nd (27) 54 nd nd 

1/18 nd 160 nd 48 4 1 nd nd 

1/19 nd 107 nd (25) (29) nd nd 

1/19 nd 100 nd nd (23) nd nd 

1/21 nd 126 nd (39) (20) nd nd 

1 122 nd 1 04 nd (44) (18) nd nd 

1 123 nd 118 nd (26) (30) nd nd 

1 123 nd 160 nd nd (32) , nd nd 

1 124 nd 98 nd nd (26) nd nd 

1 125 nd (52) nd nd (24) nd 

nd 195 nd nd nd (30) 

1 126 (17) nd 

1 126 nd 66 nd nd (1 7) nd 

nd nd nd (1 2) 

1 127 nd 84 nd nd 

1/28 nd 89 nd nd 38 nd 

nd nd nd (22) 

1 128 nd (58) 

nd (22) nd (1 5) 

1/29 nd 75 pd (1 9) nd 

1 130 nd (41 nd nd (27) I nd 

nd nd (21 

1 130 nd (55) nd (33) nd (1 2) 

2/1 nd 76 nd nd 

nd (35) nd (1 8) 

2/1 nd 61 nd (33) ' , nd 

2/2 nd (52) nd nd (37) nd (1 4) 

2/2 nd (51 ) nd nd (37) nd 

nd nd (1 3) 

2/3 nd (34) nd 

nd (27) I 

nd 40 nd (1 6) 

214 nd (46) 

nd nd (1 2) 

214 nd (40) nd 

nd (35) nd (11) 

215 nd (39) nd 39 

nd nd 40 I nd (1 5) 

216 nd (44) nd 

2/7 nd (48) nd nd 43 nd (11) 

2/8 nd 63 nd nd 64 nd (14) 

219 nd 150 nd (26) 96 nd 37 

211 0 nd 378 nd nd 67 nd 171 

2/10 nd 372 nd nd 66 nd 159 

211 1 nd 194 nd (33) 272 nd 161 

2/1 2 nd 205 nd (32) 393 nd 212 

211 2 nd 21 1 nd (28) 221 nd 162 

2/13 nd 150 nd (36) 175 nd 141 

211 4 nd 237 nd (26) 147 nd 106 

2/14 nd 208 nd (22) 1 62 nd 99 

211 5 nd 89 nd nd 101 nd 53 

211 6 nd 63 nd nd 67 nd 

nd 67 nd (24) 

211 7 nd (51 nd 

nd (28) 

211 8 nd (49) nd nd 60 (29) 

22 Dissolved Pesticide Data, San Joaquin River at Vernaiis and Sacramento River at Sacramento, 1991-94 
Table 8. Pesticide concentrations in water samples from the Sacramento River at Sacramento, 

California, October 1992 through September 1993--Continued 

Date Molinate Simazine Carbofuran Atrazine Diazinon Thiobencarb Methidathion 

1993--Continued 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

'nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

(14) 

(14) 

nd 

nd 

(15) 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nil 

nd 

nd 

nd 

nd 

nd 

Table 8 23 
I 

Table 8. Pesticide concentrations in water samples from the Sacramento River at Sacramento, 

California, October 1992 through September 1993--Continued 

Date Molinate Simazine Carbofuran Atrazine Diazinon Thiobencarb Methidathion 

24 Dissolved Pesticide Data, San Joaquln River at Vernalls and Sacramento Rlver at Sacramento, 1991-94 
Table 8. Pesticide concentration^ in Water samples from the Sacramento River at Sacramento, 

California, October 1992 through September 1993--Continued 

Date Molinate Simazine Carbofutan Atrazine Diazinon Thiobencarb Methidathion 

1993-- Continued 

7/26 (99) nd nd nd 57 nd nd 

7/28 (87) nd nd nd nd nd nd 

7/28R (85) nd nd nd nd nd nd 

812 nd nd nd nd nd nd nd 

8/4 nd nd nd nd nd nd nd 

816 nd nd nd nd nd nd nd 

819 nd nd nd nd nd nd nd 

8/11 nd nd nd nd nd nd nd 

8/16 nd nd nd nd nd nd nd 

811 8 nd nd nd nd nd nd nd 

8118R nd nd nd nd nd nd nd 

8/27 nd nd nd nd nd nd nd 

8/30 nd nd nd nd nd nd nd 

911 nd nd nd nd nd nd nd 

911R nd nd nd nd nd nd nd 

9l3 nd nd nd nd nd nd nd 

913~ nd nd nd nd nd nd nd 

9n nd nd nd nd nd nd nd 

9nR nd nd nd nd nd nd nd 

- 919 nd nd nd nd nd nd nd 

9/13 nd nd nd nd nd nd nd 

9/15 nd nd nd nd nd nd nd 

9/15R nd nd nd nd nd nd nd 

9/17 nd nd (15) nd nd nd nd 

9/20 nd nd nd nd nd nd nd 

9/22 - nd nd nd nd nd nd nd 

9/22R nd nd nd nd nd nd nd 

9124 nd nd nd nd nd nd nd 

9/27 nd nd nd nd nd nd nd 

Table 8 25 
Table 9. Pesticide concentrations in water samples from the Sacramento ~iver at Sacramento, 

California, October 1993 through April 1994 

[Modified analytical method used for analysis. Values are in nanograms per liter. Water samples were analyzed 

for the following pesticides but none detected: alachlor, atrazine. butylate, carbaryl, carbofuran, chlorpyrifos, 

cyanazine, dacthal, eptp, fonofos, malathion, metolachlor, molinate, naproparnide, pebulate, thiobencarb, and 

trifluralin. nd, nondetection; R, replicate sample; ( ), concentration below detection limit] 

Date Simazine Diazinon Methidathion Date Simazine Diazinon Methidathion 

nd 

nd 

nd . 

nd 

nd 

nd 

nd. 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

nd 

(37) 

nd 

'nd 

nd 

nd 

nd I 

nd 

nd 

(22) ' 

(19) 

69 

7 1 

104 '1 

114 

342 

127 

208 

132 

114 

111 

98 

100 

98 1, 

7 1 

nd 

180 I 

483 dl' 

452 342 

349 -SF 

354 ' 

134 

115 

115 t 

157 

140 

245 

266 

134 

209 

224 

182 

I26 Dissolved Pesticide Data, San Joaquln River at Vernalis and Sacramento River at Sacramento, 1991-94 
Table 9. Pesticide concentrations in water samples from the Sacramento River at Sacramento, 

California, October 1993 through April 1994--Continued 

Date Simazine Diazinon Methidathion Date Simazine Diazinon Methidathion 

1994--Continued 1994--Continued 

U22 522 44 nd 3/28 nd nd nd 

U23 182 53 nd 3/30 (44) nd nd 

U23R 155 49 nd 313OR (35) nd nd 

2/24 233 4 1 nd 411 nd nd nd 

2/25 156 (19) nd 414 nd nd nd 

U28 108 (17) nd 416 (36) nd nd 

U28R 74 nd nd 416R (36) nd nd 

3/2 75 nd nd 418 nd nd nd 

314 nd nd nd 411 1 nd nd 

3/7 nd nd nd 4/13 nd nd nd \ nd 

3/9 nd nd nd 4113R nd nd nd 

3/9R nd nd nd 411 5 nd nd nd 

311 1 nd nd nd 411 8 nd . nd nd 

3/14 nd nd nd 4/20 76 nd nd 

311 6 nd nd nd 4/23 61 nd nd 

3116R nd nd nd 4/25 11 1 nd nd 

311 8 nd nd nd 4/27 nd nd nd 

3/21 nd nd nd 4/27R nd nd nd 

3/23 nd nd nd I? oM129 nd nd nd 

*u.s. GOVERNMENT PRINTING OWICE: W9S - 64J4-36Sf.3POIO Table 9 27