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