โ Scribed by K. Imandel; N. Razeghi; P. Samar
No coin nor oath required. For personal study only.
To assess the pollution effects of detergents in Tehran ground water aquifer, from December 1974 to September 1975, out of 3756 wells within metropolitan Tehran, 316 wells were selected according to simple random sampling without replacement. Samples from the ground water were analyzed for concentration of detergents by Methylene Blue Colorimetric Method.
The conclusion asserted is that with a confidence limit of 95ยฐ70, standard error of 2, and permissible error of ! 0 . 0 0 5 , the average concentration of detergents in Tehran ground water aquifer is within 0.1593 to 0.1163 mg 1 -l as MBAS.
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The fate ofwastewater effluents discharged from 17 septic tank disposal systems located near the shores of eight lakes in northeastern and eastern New York State was investigated. Fecal coliforms, chloride, conductivity, dissolved O a, phosphate and various forms of N in ground water samples were an