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surface migration is minimal with recorded data indicating <br /> readings from zero into the parts per million range. <br /> The data obtained during this investigation would tend to show <br /> that there is a minimal presence of surface methane migration gas. <br /> These conditions should be controllable by use of some of the <br /> industries ' standard protection systems. <br /> The most commonly used methods include but are not limited to <br /> compacted clay barriers, horizontal trenching, and impervious <br /> liners. <br /> Specific design for the total site could be done or on an <br /> individual lot by lot plan. However, we recommend before any <br /> construction takes place a qualified engineering firm design an <br /> effect protection system. <br /> Sincerely, <br /> MAND ILLE & ASSOCIATES <br /> Hugh Walker <br /> Chief Operating Officer <br /> DF:HAW:jrm <br /> i <br /> 4 <br /> 1 <br /> i <br /> r- <br /> j70-Y87010 4 <br />