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Sampling Procedures, EPA-600/2-81-160, WESTON, 1987 Standard Operating Procedures for <br />' Washington, D C Monitor Well Installation MOUND IGMP/RIP <br /> --- 1985 Practice Guide for Groundwater Barcelona, M J Helfrich, J A , and Garske, E E , <br /> Sampling, EPA-600/2/85-104, September "Sampling Tubing Effects on Groundwater Samples" <br /> 1985 1985,Analy Chem ,Vol 57,pp 460-463 <br /> Nielsen, David M and Yeates, Gillian L , Spring <br />' 1985 "A Comparison of Sampling Mechanisms <br /> Available for Small-Diameter Groundwater <br /> Monitoring Wells,"Groundwater Monitoring Review, <br /> pp 83-99 <br /> 1 <br /> lie <br /> 15 <br />