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Groundwater Quality Monitoring Plan <br /> It is proposed that "control charts" be constructed for each of the indicator parameters in <br /> each of the water systems so that annual water quality data can be tracked to evaluate <br /> any potential trends in water quality. For all of the parameters there will be an upper <br /> control limit beyond which a significant change in ambient water quality can be <br /> assumed. It is also proposed that the stream standard for each of the indicator <br /> parameters be shown on the control chart, as, for some parameters, stream standards <br /> may have already been exceeded in the background water quality, while, for other <br /> parameters, stream standards are above the expected range of natural variations in <br /> water chemistry. <br /> These control charts would be prepared on an annual basis as additional water quality <br /> data become available from additional sampling events. <br /> 4.0 REPORTING <br /> It is proposed that control charts, generated on a quarterly basis, will be provided to the <br /> Division on an annual basis to demonstrate changes in water quality with time. If <br /> exceedances of the control charts are noted after regular annual sampling, a specific <br /> response plan will be prepared by LGE to address that issue. The specific response <br /> plan would be based on an evaluation of the number of indicator parameters that show <br /> exceedances and the duration of these exceedances. <br /> 5.0 VERIFICATION RE-SAMPLING <br /> Under certain circumstances a verification re-sampling may be collected, and samples <br /> submitted for analysis using the Groundwater Sampling Plan. The samples will be <br /> collected within four weeks of the analytical report date. A verification sample may be at <br /> collected the following sampling event depending on the frequency of sampling. <br /> Verification re-samples are designed to provide confirmation of the sample analytical <br /> data for sample result anomalies or statistical analysis. <br /> ,g-,MOLEN LG Everist Monitoring Plan <br /> &ASSOCIATES Page 7 of 7 <br />