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Messrs. Refer and Molen February 1, 2005 <br />M-1999-034 Page 3 <br />Well Sampling Protocol <br />1 Introduction <br />• Note that the CDPHE sampling protocol was also consulted. <br />2 Project Description <br />• Consider Mr. Topper's offer in his December 7, 2004 a-mail regarding possible installation of a <br />sampling port to avoid pump surging. The Division suggests you discuss related costs and timing <br />of installation. If a sampling port is installed, please address this setup in this section and section <br />"6 Sampling Method." <br />3 Preparation for Sampling Event <br />1. As noted with the Lake Sampling Protocol, please separate preparation activities from equipment <br />needed. <br />2. Confirm sample bottle size. Field notes from the August 2003 samples say 2.5 L versus 1 L noted <br />here. <br />3. Include extra sample bottles and lids in the materials list, in case either is dropped. <br />4. As noted for the Lake Sampling Protocol, do the bottles have Teflon-lined lids, as noted in the <br />TNRCC sampling procedures? Does the lab completely prepare the sample bottles (i.e. pre-rinse <br />with one of the listed solvents for semi-volatiles)? <br />5. Please provide for prior notification of sampling to the Toppers, to address one of Mr. Topper's <br />"critical concerns" expressed in his December 7, 2004 a-mail. <br />6. Include notifying the owner of the sampler's arrival on site, and departure, if home. Otherwise, <br />leave notification that sampling occurred. <br />7. Clarify what kind of "Information on the specific laboratory analysis to be performed" is needed. <br />8.- 7ncCude a copy o1"a Field-Data Sfieet. lfthese wilt also be used witfi rake"sampling, please include <br />this item in that protocol, too. <br />9. Add Alconox to materials list. <br />4 Static Water Measurement <br />1. What is the distilled-water-saturated half of the paper towel used for? <br />2. Note that at least 40 feet of measuring cable needs to be unwound and decontaminated. <br />3. How is the cable kept from being contaminated by the ground as 40-60 feet are unwound? <br />4. Ensure the procedures and record sheet show that the casing height above ground level will be <br />s~fracfedfirom tfie wa er ve ertmeasurement o rnva a of"the depth-fo ground wafer~m ground <br />level. Typically hold, cut, casing height, and resultant ground water level appear on the record <br />sheet. <br />5. Include a copy of the "Field Data Sheet." <br />5 Well Purging <br />1. Note that the lower pump rate will be used "for the purpose of calculating well casing volume." <br />2. Based upon the CDPHE and generally accepted guidelines, requirements to purge the well are <br />based upon casing volumes rather than borehole volumes. Please adjust the language in the <br />document to reflect this basis (e.g. Step 5, Step 6). <br />3. Step 1. Please discuss with the Toppers where to route the purged water to minimize any erosion <br />and flooding. <br />4. Add a step before step 3 or 4 (depending upon the time required) to check instrument calibration, <br />including the pH and conductivity meters. Record calibration responses, times, and calibration <br />standards used. <br />5. Step 4. Include "time" in the recorded parameters. <br />6. Step 6. Specify a minimum time interval between samples to determine stabilization. Mr, Topper, <br />in his December 7, 2004 a-mail suggested sampling field water quality parameters "after purging <br />