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• Richard D. Piland & Associates <br />Hydrology Monitoring Report 2008 <br />Groundwater Operating Procedures <br />Bi-monthly water level measurements are made with an electronic water level <br />indicator. The indicator is lowered into the well and the cable marked, at the top of the <br />casing, when the probe contacts the water surface. The distance is then measured to <br />the hundredth of a foot. The well name, date, time, and distance to water are recorded <br />in a field book. Due to the stretch of the cable on the water level indicator, a correction <br />factor is applied to the field measurement. The distance is then converted to a water <br />level elevation. <br />Yearly ground water quality samples are collected each year. All wells except <br />MW-12 have a dedicated submersible pump which is used to purge the well and collect <br />a water quality sample. At MW-12 a portable pump is used. Water quality parameters <br />for temperature, pH, and conductivity are monitored during the purging process. <br />Sample bottle sets which are furnished by the laboratory are field filtered, filled, and <br />preserved as required. The samples are packed with ice in a cooler for shipment to the <br />lab. Battery B is the category of analytical parameters for groundwater sampling. A list <br />of these parameters is in Appendix D. For 2008 chain of custody forms labeled "Site <br />Well Battery B" were used for lab delivery of sample sets. Notes of the sampling <br />• process are recorded in a field book which includes well name, data, time, water depth, <br />total depth, purge volume, and field water quality parameters. <br />Groundwater Monitoring Data <br />The groundwater monitoring data for 2008 is represented in both graph and <br />tabular form. Graphs were made of the bi-monthly water level elevations plotted against <br />a monthly average elevation for the well and the monthly precipitation for the year. A <br />set of graphs grouping wells of similar geological completion intervals was also made. <br />These graphs are in Appendix C of this report. <br />Table 7 tabulates and graphs the average bi-monthly water level elevations. <br />Yearly average groundwater elevations are in Table 8 with a graph of the WW-4 series <br />of wells. During 2008 the groundwater levels for deeper wells are lower than the <br />average elevation and at the shallower wells above average elevation. The ground <br />water elevations at WW-10 changed considerably when the pump was pulled from the <br />well in June 2007. During 2008 the WWA 0 water level was consistently lower then <br />prior years. <br />Yearly groundwater quality samples were collected in eleven monitoring wells <br />during 2008. Graphs of the groundwater quality were made comparing each parameter <br />for 2008 to the average. Graphs were also made comparing milligram-equivalents per <br />liter for seven chemical constituents at wells of similar geological completion intervals. <br />The graphs showed chemical constituents to be similar for the same aquifers. <br />• A groundwater duplicate sample was not collected in 2008. <br />9