Procedures for the Collection of Representative Water Quality Data from Monitoring Wells

摘要

Data collected from six monitoring wells at waste disposal sites in Illinois were used to evaluate procedures for the collection of 'representative' water samples from monitoring wells. The effects on chemical composition of water samples of four types of pumping mechanisms, the extent of well flushing, the rate and time of pumping, and storage and preservation techniques were studied. Pump tests and multiple sample experiments provided data on which recommended sampling protocols and sample preservation, preparation, and storage procedures are based. The selection of the type of sampling device; sample preparation, preservation, and storage; and sampling procedures all must be tailored to the size and accessibility of the individual well.