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be seen both by our analyses and Lyman and Henn's analyses that the threshold velocity is <br />exceeded in the blasting for the production (P) and the access road (A) for the wastewater <br />treatment facility and the threshold velocity is exceeded for the lighting facilities for the quarry <br />(Q), production (P) and access road (A) blasting. A standard criteria for damage caused by <br />blasting is a particle velocity of 2 inches per second. This is exceeded in the production (P) <br />blasts at the control building and the solids building at the wastewater treatment facility and for <br />all of the blasts at the lighting facility. Another criterion for a threshold velocity is human <br />response. Quarry blasting typically results in frequencies of 10 to 100 cps and in this range the <br />threshold particle velocity for nuisance to humans is 0.2 inches per second. This threshold is <br />exceeded in all of the blasts. The reason that the human threshold is useful is the effect that the <br />blasting will have on the instrumentation in the wastewater treatment facility. The human <br />threshold is far exceeded at most of the structures which would indicate that the <br />instrumentation may also be adversely affected. <br />The analysis is very sensitive to the transmissivity value (K). A value of 160 was <br />J assumed in our analyses as well as Lyman and Hemm's. This is an average value. A site specific <br />I <br />value should be determined. Once a site specific (K) value is determined, the analyses should <br />be redone. The results of the more accurate analyses should be provided to the structural <br />J <br />engineer so that the he can determine the affects on the structures. The affects of the vibrations <br />on the various instrumentation should also be determined. <br />LIMITATIONS <br />This report has been prepazed in accordance with generally accepted geotechnical <br />engineering practices in this area for use by the client. <br />5 <br />