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Job No. 00760 Page: 5 f <br /> gas hydrocarbon concentrations of 27,300 ppm. <br /> a <br /> RECOMMENDATIONS <br /> The four currently piped vapor wells (VW-6 through VW-9) <br /> and monitoring well MHT-4 should be connected to a manifold <br /> f � <br /> for vacuum extraction. Additiopally, monitoring well MW-2 <br /> should be piped for use as a vacuum extraction well. The <br /> manifold should be constructed of 3/4" (or larger) PVC <br /> fittings and pipe. This will allow for adequate extraction. <br /> volumes. Based on these recommendations, the system to be <br /> installed is represented in Fig. 1. Air permits for this j <br /> system are currently applied for from the San Joaquin <br /> IA <br /> County Air Pollution Control District. <br /> s <br /> � F <br /> { <br /> t". 'Yxai <br /> s <br /> i <br />