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GEOTECHNICAL <br /> NEIL O. ANDERSON ENVIRONMENTAL <br /> A N D A S S O C I A T E S INSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> POST TENSION DESIGN <br /> June 15, 2006 <br /> NOA Project Number: E06070A <br /> OPERATION &MANAGEMENT PLAN <br /> 13203 DIAMOND LANE <br /> LODI, CALIFORNIA 95240 <br /> ' 1.0 INTRODUCTION <br /> ' NEIL O.ANDERSON&ASSOCIATES,INC. (NOA)has prepared this Operation and Management <br /> Plan (O&M Plan) for the residence located at 13203 Diamond Lane,Lodi, California. The residence <br /> is within 1,000 feet of the boundary of a disposal area. This residence is designed with a passive <br /> methane gas mitigation system located below the floor slab with a vent to the outside,along with three <br /> methane gas sensors. <br /> 2.0 POLICY <br /> • The methane mitigation system will need to be maintained and operated in a manner that <br /> assures compliance with regulatory agencies. <br /> ' Residents shall be instructed and trained on how to monitor the readings and what to do in case <br /> of an alarm. Practice a home exit plan with the residences (Section 7.0). <br /> • A copy of this O&M plan shall be available for all residents and owners of the property. <br /> Residents shall be familiar with its contents and will be trained in operating the system. <br /> • In case of a problem with the system, appropriate corrective actions need to be conducted <br /> immediately. <br /> 3.0 DESCRIPTION OF SYSTEM OPERATION <br /> The passive methane mitigation system allows any build up of gases beneath the slab floor to be vented <br /> to the atmosphere and to act as a barrier between the subfloor and the living space. Any possible gas <br /> produced from the nearby disposal area that raises to beneath the slab of the residence will enter the <br /> gravel subfloor.This gas within the gravel may then enter the horizontal pipes located beneath the slab <br /> ' within the gravel, and travel through the pipe, up the vent, and exit out the pipe protruding from the <br /> roof of the residence. One sensor is located within the vent to detect any methane gas migration up the <br /> vent. Two additional sensors, one located in the residence and one in the garage are to detect any <br /> LODI ■ SACRAMENTO ■ MODESTO <br /> ' ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,California 95240 ■209.367.3701 0 209.369.4228 fax 0 www.noanderson.com <br />