9409

• UCREFRP Catalog Number: 9409
• Author: Spahr, N. E. and R. W. Boulger.
• Title: Interim Results of Quality-Control Sampling of Surface Water for the Upper Colorado River national Water-Quality Assessment Study Unit, Water Years 1995-96.
• USFW Year: 1997.
• USFW - Doc Type: 97-4227,
• Copyright Material: NO

CONTENTS

Abstract............................................................................,.... ................................................................................................
1

Introduction........................................................................... ............................................................................................,...
1

Purpose and Scope...................................................... ................................................................,............................... 3

Acknowledgments...................................................... ................................................................................................ 3

Quality-Control Sampling Program.... ....... ..... ............... ....... . ............. ......... ......................................................................... 3

Replicate Samples....................................................... ................................................................................................ 4

Pre-Processing Split Replicates ........................ ............................ ..... ................... ..... ..... ..... .................... .... ..... 6
Comparison of General Chemical Consti uents ...................................................................................... 6
Comparison of Nutrients and Organic C bon ........................................................................................ 9
Comparison of Trace Elements .............. ................................................................................................ 12
Concurrent and Sequential Replicates .............. ................................................................................................ 15
Comparison of General Chemical Consti ents ...................................................................................... 15
Comparison of Nutrients and Organic C bon ........................................................................................ 20
Post-Processing Split Replicates. ............ ..... ..... . ...................... ................................................... ...................... 24
Comparison of General Chemical Consti uents ...................................................................................... 25
Comparison of Nutrients and Organic C bon ........................................................................................ 28

Field Blanks................................................................ ................................................................................................ 31

General Chemical Constituents ........................ ................................................................................................ '31
Nutrients and Organic Carbon ............................................................................... ...................... .......... ..... ....... 32

Conclusions............................................................................................................................................................................
34

References Cited.................................................................................................................................................................... 34

FIGURES

1. Map showing location of sampling sites.;................................................................................................................... 2
2-5. Graphs showing:
2. Distribution of collection of pre-processing sp it-replicate samples, 1995-96................................................ 6
3. Distribution of collection of concurrent- and s quential-replicate samples, 1995-96..................................... 15
4. Distribution of collection of post-processing s lit-replicate samples, 1995-96.............................................. 25
5. Distribution of collection of field blanks, 1995 96......................................................................................... 32

TABLES

10.

1. Water-quality monitoring sites in the Upper Color do River study unit................................................................
2. Distribution of replicate samPles............................j... ....................................... ....... ............ ....... .......... ..... ............
3. Distribution of field-blank samples ......................... ...............................................................................................

4. ~:e::t~:n~~i;::~;~~~.~~~~. .~~~.~~~.~~~~~~~~~~~.. ~~.~~~~~~~~.~~~~ .~.~~~~~ .~~~..~~~~~.~......... ..................................

5. Summary of differences between environmental a d pre-processing split-replicate samples

for general chemical constituents ... ......... ... ............. ..... ... ....... ....... ..... ....... ..... ..... ...................................................

6. Comparisons of environmental and pre-processing split-replicate samples for nutrients and

organic carbon......................................................... ............................................................................................... 10

7. Summary of differences between environmental a pre-processing split-replicate samples
for nutrients and organic carbon.............................. ............................................................................................... 12
8. Comparison of environmental and pre-processing s lit-replicate samples for trace elements ............................... 13
9. Comparison of environmental and concurrent- and sequential-replicate samples for general

chemical constituents .............................................. ........................................................ ..... .......... ....... .......... ....... 16

Summary of differences between environmental an concurrent-replicate samples for general

chemical constituents ...... ... ..................... ..... ........... ........ ......... ..... ..... ..... ............ ................................................... 20

Comparison of environmental and concurrent- and sequential-replicate samples for nutrients

and organic carbon.................................................. ............................................................................................... 21

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4
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9

11.

CONTENTSilll