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FOREWORD th~accomplishment of our objective m protectmg the enVIronment reqUIres a relIable assessment of the present condition and a determmatlon of the effectiveness of corrective measures DecIsions which must be made on the need for pollutIOn abatement and the most efficient means of achlevmg environmental quahty depend upon the avatlabillty of sound data Test procedures for measurement ofthe presence and concentration ofsubstances hazardous to human health as well as an evaluation ofthe qualIty ofthe environment are essential to satisfactory declSlon-makmg This manual of chemical methods was prepared by the staff of the Environmental Momtonng and Support Laboratory of the Environmental Research Laboratory, Cmcmnatl to prOVide procedures for momtonng water supplIes, waste dIscharges, and the qualIty of ambIent waters These test methods have been carefully selected to meet the needs of Federal LegIslatIOn and to prOVide gUIdance to laboratones engaged m protectmg human health and the aquatic environment The contnbuttons and counsel ofsCientists m other EP A laboratones are gratefully acknowledged Test procedures contamed herem, that are approved for water and waste momtonng under the Safe Dnnkmg Water Act (SDWA) and the NatIOnal Pollutant DIscharge Eltmmatton System (NPDES), of PL 92-500 are so mdicated at the bottom of each tItle page These approved methods are also recommended for ambient momtonng needs of Section 106 and 208 ofPL 92-500 Methods WIthout thIS stated approval are presented for mformatton only Correspondence on these methods IS mVIted Robert L Booth Actmg DIrector, EnVIronmental Momtonng and Support Laboratory, CmcmnatI, OhIO 45268 111PDF Image | Methods for Chemical Analysis of Water and Wastes
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