Dispersion and persistence of synthetic detergents in ground water, San Bernardino and Riverside Counties : [a report to the State Water Quality Control Board, September 1964.

  • California. Department of Water Resources.
Date:
1965
Catalogue details

Licence: Public Domain Mark

Credit: Dispersion and persistence of synthetic detergents in ground water, San Bernardino and Riverside Counties : [a report to the State Water Quality Control Board, September 1964. Source: Wellcome Collection.

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    TENSIOMETER CLOTH BAG END OF TUBING =» WOR “MAY BE INTERMITTENTLY CONNECTED TO SAMPLING SR AM eo Ee TTAND DRY ORT FLOWING FLASK & VACUUM TANK CONTINUOUSLY, a) TENSIOMETER— SURFACE SAMPLING i STOP CLAMP TO HOLD 73 Oren VACUUM WHILE CHANGING FLASKS VACUUM GAGE q 7 Ow (4) { i OSU KLE PAELLA DV ED PD FF A> LE 3/4 GALVA- NIZED PIPE USED FOR OUTER CASING ee b) TENSIOMETER-— UNSATURATED ZONE SAMPLING“ 1 J wo i}! ' iw? e : Yes CERAMIC UNITS ets SEPARATED BY mil [fo > PERFORATIONS RUBBER WASHERS a ite i} 4 iy I> a l H \o 1 lu INTERNAL ort J v OUTER ASSEMBLY o ASSEMBLY Z = NOTE THE UNIT CONSISTS OF TWO PARTS. THE OUTER ASSEMBLY IS A METAL PIPE THAT IS PERFORATED AT ITS LOWER END TO ALLOW SOIL MOISTURE TO ENTER. THE INTERNAL ASSEMBLY IS A SERIES OF POROUS CERAMIC UNITS CONNECTED TO A LENGTH OF COPPER TUBING. THIS UNIT IS PLACED INSIDE THE CASING. ANNULAR SPACE BETWEEN THE TWO ASSEMBLIES IS FILLED WITH SAND. THE END OF THE COPPER TUBING IS CONNECTED TO THE SAMPLING FLASK AND VACUUM TANK, (NOT TO SCALE) DIAGRAMMATIC SKETCH SHOWING USE OF TENSIOMETER