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14" min. dia. <br /> manhole <br /> Cord grip <br /> 0 <br /> ado°-ay1 >,p°Pb=�6 <br /> ��° Oe D V� ✓V 1 Q`�l�d <br /> y9S,lQd <br /> Seal-off <br /> R�1/2" rigid conduit (to Console) <br /> Weatherproof junction box with <br /> 1/2-inch N.P.T. threads (16 cubic <br /> inch volume minimum) <br /> • • Perforated PVC <br /> • • monitoring well <br /> • . housing <br /> • • <br /> ® ' ® Vapor sensor <br /> Suspend vapor sensor 12 inches <br /> above highest level reached by LLJ <br /> water table, if known; or 12 inches <br /> above the bottom of the well <br /> or any water In the well. sensorsWapsinst.eps <br /> Item M.-Typical Vapor Sensor Installation <br /> Figure 5. TLS-350 Probe and Sensor Installation Diagrams-cont'd <br /> 23 <br />