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a Soil Vapor Extraction and Air Sparging <br /> Performance Monitoring Plan . <br /> Stockton Yard,Maintenance Facility,Stockton <br /> Page 4-2 <br /> f The AS and SVETS should not pose'a hearing hazard and sound levels should be at or near acceptable <br /> „} sound levels (approximately 80.dBA). Additional noise can also result from a partially open air inlet <br /> valve. Ear plugs should be wornwhen air inlet valve noise or vacuum blower sounds are disturbing. <br /> 4.4 Emergency Telephone Numbers <br /> Fire Department-911” <br /> Ambulance- 911 <br /> Police- 911 <br /> D.:\PMP\Stockton Yard PMP.doc <br />