PROGRAMS AND PLANS--Data Networks, National stream quality accounting network



                                          February 28, 1974

QUALITY OF WATER BRANCH TECHNICAL MEMORANDUM NO. 74.11

Subject: PROGRAMS AND PLANS--Data Networks, National stream
         quality accounting network

Thc attached general field instructions for the national stream 
quality accounting network for FY 1974 become effective on receipt 
of this memorandum.

The instructions include some minor changes that reflect the 
present operational design of the network. The following parameter 
code usages supersede those in the October 31, and November 1, 
1973 memorandums from the Assistant Chief Hydrologist for 
Operations, and are reflected in the attached set of instructions:

1. 70342, suspended sediments, fall diameter, % finer than
0.062 mm has been changed to 70331, suspended sediments,
sieve diameter, % finer than 0.062 mm.


2. The only parameter code to be used for pH is 00400--pH 
(standard units).

Any questions concerning the sampling instructions should be 
directed to the Quality of Water Branch. Thank you for your 
cooperation.



                           R. J. Pickering

Attachment

WRD Distribution: A, FO, PO, S