PUBLICATIONS - "Sampling Procedures and Problems in Determining Pesticides in the Hydrologic Environment," by H. R. Feltz.;and J. K. Culbertson


                                            April 23, 1973 

QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 73.16

Subject: PUBLICATIONS - "Sampling Procedures and Problems in
         Determining Pesticides in the Hydrologic
         Environment," by H. R. Feltz.;and J. K. Culbertson

A reprint of the subject article is enclosed as a continuing 
reminder of the importance of representative sampling in 
assessing water-quality conditions. The uneven distribution 
of velocity, and therefore sediment, in most stream.cross 
sections should be considered each time a sampling program is 
planned.



                     J. K. Culbertson
                     Acting Chief, Quality of Water Branch

Enclosure

WRD Distribution: 
A (Regional Hydrologists, l copy)
FO-LS