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' May 1, 2007 ' OPERATION AND MANAGEMENT LAN 3455 FRENCH CAMP TURNPIKE STOCKTON, CALIFORNIA ' OUR PROJECT NUMBER: E07061A 1.0 INTRODUCTION ' Neil 0. Anderson & Associates Inc. NOA prepared this Operation and ( ) has p p p Management Plan (0&M Plan) for the residence located at 3455 French Camp Turnpike, Stockton, California. The residence is within 1,000 feet of the boundary of a disposal area. This residence is designed with a passive methane gas mitigation system located ' below the floor slab with a vent to the outside, along with three methane gas sensors. 2.0 POLICY ' 0 The methane mitigation system will need to be maintained and operated in a manner that assures compliance with regulatory agencies. Residents shall be instructed and trained on how to monitor the readings and what to do in case of an alarm. Practice a home exit plan with the residences (Section 7.0). • A copy of this 0&M Plan shall be available for all residents and owners of the property. Residents shall be familiar with its contents and will be trained in operating the system. • In case of a problem with the system, appropriate corrective actions need to be ' conducted immediately. ' 3.0 DESCRIPTION OF SYSTEM OPERATION The passive methane mitigation system allows any build up of gases beneath the slab floor to be vented to the atmosphere and to act as a barrier between the subfloor and the living space. Any possible gas produced from the nearby disposal area that raises ' to beneath the slab of the residence will enter the gravel subfloor. This gas within the gravel may then enter the horizontal pipes located beneath the slab within the gravel and travel up through the pipe, up the vent, and exit out the pipe protruding from the roof of the residence. One sensor is located within the vent to detect any methane gas '-'04 902 Industrial way,Lodi, G4 95240 209.367 3701-Fax 209.369.4228 02007 Neil O.Anderson&Associates,Inc