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Mr. Gregory Fletcher -2_ <br /> 1 September 1988 <br /> ND atlra detection limit of 20, 00 ppb should not be plotted <br /> as 0 they should be plotted at the detection limit. This <br /> is true for the summary table also (Appendix B) . <br /> Table 1 should read 20 instead of 0. 02 for ND for <br /> hydrocarbons for MW-29, MW-32, and the Domestic Well. <br /> - The 110" values on Figure 5 are not all 110" (See above <br /> comment on treatment of ND value. ) . <br /> Since- Figure 6-is-based-an,Fi.gu --� 5I , I <br /> requested that these figures be corrected, but they weren't <br /> in the revised edition. <br /> - What is the location of the dometicwell sampled? The <br /> •presence of toluene at low levels in this well indicates <br /> that more frequent sampling of this -well may be in order. <br /> - Appendix C graphs of concentrati n versus time for MW- <br /> 13 , 16, 17, 18, and 23 are incorrect because of the improper <br /> interpretation of 11ND11 <br /> i <br /> If you have any questions, please call me at (916) 361-5731. <br /> i <br /> GARY S. JOHNSON <br />�. <br /> Engineering :Geologist <br /> GSJ:gj <br /> cc: Xs. Laurie Cotulla, San Joaquin Local Health District, <br /> Stockton <br /> i <br />