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Stockton NCTS, - 2 - 30 May 2001 <br /> Draft FSP for Leachable Lead at Pistol Range <br /> mean of each data set from each of the individual water quality assessment areas, should be used to test <br /> the null and alternate hypotheses of the decision rule. This method, statistically comparing the soil <br /> extract concentrations from each assessment area to either the background concentrations or the water <br /> quality objectives, confornis to the draft 1992 Regional Board technical report methodology. This will <br /> result in a determination for each of the eight water quality assessment areas whether or not the leachable <br /> lead concentrations in the soil pose a threat to water quality. <br /> Section 1.3.1.5, page 12. The "decision rule" discussion should be revised to incorporate revisions made <br /> to Section 1.2.2 in response to our concerns. <br /> Please submit a revised SAP that incorporates revisions in response to the above comments. If you have <br /> any questions please contact me at (916) 255-3066 or russelj�rb5s.swrcb.ca.,gov. <br /> d0 <br /> JOHN RUSSELL <br /> Senior Engineering Geologist <br /> cc: San Joaquin County Environmental Health Department <br /> Brad Beeman NCTS, Stockton <br /> Terry Escarda, Region 1, DTSC <br /> Jay Jahangiri, Port of Stockton <br /> Peter Petro, Tetra Tech EM, Inc, 10670 White Rock Road, <br /> Suite 100, Rancho Cordova, CA 95670 <br /> JSR:NCTS Draft FSP WET Pistol Range <br />