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3.ANNUAL REPORT FOR 2013 ' <br /> HydraSleeve samplers are now used to collect groundwater samples as approved in a r <br /> November 10,2011, email from the RWQCB to SFPP. This"no purge' sampling <br /> methodology was implemented on a sitewide basis beginning with the first semiannual <br /> 2012 sampling event. A study was performed during the second semiannual 2011 sampling <br /> event that included split sampling for 50 percent(7 of 14) of the wells using both <br /> methodologies,which captured the range of conditions at the Site (low-to-high , <br /> concentrations,coarse versus fine-grained lithology, shallow versus deep screens) during <br /> the September 2011 semiannual sampling event. The two sets of results were found to be <br /> comparable. The results are presented in the Second Semiannual and 2011 Annual Groundwater , <br /> Monitoring Report (CH2M HILL, 2011). <br /> 1 <br /> 1 <br /> 1 <br /> r <br /> r <br /> • r <br /> r <br /> rl <br /> 1 <br /> r � <br /> 34 WBG101513183707SCO/HOLT_2SA13 REPORT_FINAL r � <br />