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k <br /> GROUNDWATER QUALITY SAMPLING - INSTALLED GROUNDWATER QUALITY <br /> MONITORING WELLS <br /> i <br /> Prior to collecting any groundwater samples, groundwater surface elevations in each <br /> s <br /> groundwater quality monitoring well will be measured to further define the prevailing <br /> groundwater hydraulic gradient Prior to sampling, the groundwater quality monitoring well <br />{ will be checked for the presence of floating product utilizing a decontaminated acrylic bailer <br /> The groundwater quality monitoring well will then be purged of stagnant groundwater <br /> I <br /> utilizing a decontaminated acrylic bailer Prior to initial use, and between subsequent purging <br /> events, the acrylic bailer will be disassembled, washed in a mixture of Liqui-Nox and clear <br /> water, rinsed in clear water, rinsed in distilled water, rinsed in deionized water, allowed to air <br /> dry, and reassembled The use of phosphate based cleaners, such as TSP, will not be allowed <br /> f• due to the documented laboratory analyses interference effects caused by the phosphate <br /> compounds in these types of cleaners Purged water will be monitored for pH, temperature <br /> and conductivity. Purging will cease when temperature and conductivity readings have <br /> stabilized after five minutes of continual monitoring. Groundwater pH, conductivity and <br /> 4 temperature will be documented during purging operations. <br /> Each groundwater quality monitoring well will be sampled utilizing a decontaminated Teflon <br /> or stainless-steel point-source bailer Groundwater samples will be collected in laboratory <br /> supplied containers at the base of the bailer via a Teflon check valve and nipple Prior to <br /> initial use, and between sampling each subsequent groundwater quality monitoring well, the <br /> i <br /> bailer will be disassembled, washed in a mixture of Liqui-Nox and clear water, rinsed in clear <br /> water, rinsed in distilled water, rinsed in deionized water, allowed to air dry, and reassembled <br /> The use of phosphate based cleaners, such as TSP, will not be allowed due to the documented <br /> laboratory analyses interference effects caused by the phosphate compounds in these types of <br /> �iraa �zs� Page 23 <br />