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1 .4. Sampling Procedure <br /> The following protocol will be used for the collection and testing of water samples: <br /> 1) Specific bottles will be ordered from an appropriate laboratory which will be used for <br /> collecting water samples. <br /> 2) The static water level of the groundwater well will be measured and recorded using a <br /> water level well sounder prior to pumping of the well. The measurement location at the <br /> top edge of the well casing will be marked with a permanent ink pen. This mark will be <br /> touched up with fresh ink each time a sample is taken <br /> 3) The contents of the well will be purged prior to sample collection using a low-flow, <br /> submersible pump. This pump will be cleaned prior to being placed in the well. At least <br /> three well volumes will be removed prior to sampling. The purged water will be collected <br /> in a gallon bucket to confirm that the correct volume has been purged from the well. <br /> 4) The following field measurements will be taken with cleaned and calibrated meters: <br /> a. pH <br /> b. Temperature <br /> c. Dissolved Oxygen <br /> d. Turbidity <br /> e. Conductivity <br /> 5) Water will be pumped from the well into a clean pitcher or bottle which will be used to fill <br /> the bottles from the laboratory. The bottles will be marked with the date, time, and site <br /> location of the sample as well as the person who collected the sample. If a pump <br /> controller system is used, the sample bottles may be filled directly from the well. Filled <br /> sample bottles with then be places in a cooler with ice. <br /> 6) A chain of custody will be completed for the sample which indicates what analyses need <br /> to be performed, the date and time of sampling, sample identification, and who <br /> assembled the sample. The samples will be delivered to the lab the day of collection. <br /> 2. Analytical Procedures <br /> The results from the analytical water quality testing will be evaluated through comparison with <br /> the State groundwater quality standards. There are no specified areas on the subject property <br /> that require conformance with anything other than statewide water quality standards. <br /> 2.1 . State Water Quality Standards <br /> The analytical results of water quality testing during mining will be compared to the regulatory <br /> limits established by Water Quality Control Commission (WQCC). The groundwater of the <br /> subject property is subject to the statewide standards identified in the CDPHE Regulation No. <br /> 41. The Delta Paving site is not within any classified areas identified by the CDPHE to have <br /> specific groundwater quality standards. <br /> Tables 1-4 of Regulation 41 identifies the basic standards of groundwater quality parameters <br /> that the Delta Paving Gravel Pit must remain in compliance with. If any exceedances of these <br /> Delta Paving Gravel Pit <br /> Groundwater Monitoring Plan G-2- 6 © Lewieki 81 Associates <br /> September 2022 <br />