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a <br /> MI-62LIM] <br /> ENVIRONMENIA: FIELD :EF ISE <br /> MAY 23,2023 <br /> PROJECT 672.07.01 <br /> MR.KRISNEIL NAIR <br /> FORWARD LANDFILL <br /> 9999 SOUTH AUSTIN ROAD <br /> MANTECA,CALIFORNIA 95336 <br /> RE: AMBIENT AIR ASBESTOS MONITORING RESULTS,FORWARD LANDFILL, <br /> MANTECA, CALIFORNIA <br /> Dear Mr.Nair: <br /> The results of the April 2023 asbestos air monitoring program at the Forward Landfill in San <br /> Joaquin County are presented in this report. The purpose of this program was to measure fibers <br /> at predominant upwind and downwind monitoring locations at the Forward Landfill to comply <br /> with the requirements of Solid Waste Facility Permit (SWFP) No. 39-AA-0015. Monitoring of <br /> the non-friable asbestos disposal area at the site is completed semiannually to comply with this <br /> SWFP permit condition. Sample collection was performed by Del-Tech Geotechnical Support, <br /> Inc (Del-Tech) on April 28, 2023. Laboratory analysis was completed by Asbestos TEM <br /> Laboratories (ATEML) of Oakland, California. ATEML is accredited for airborne asbestos fiber <br /> analysis through the National Voluntary Laboratory Accreditation Program (NVLAP). Sampling <br /> and analysis procedures are described below along with the monitoring results for the April 2023 <br /> program. <br /> SAMPLING AND ANALYSIS PROCEDURES <br /> Samples were collected on April 28, 2023 over an approximately nine-hour sampling period <br /> from five locations on the perimeter of the non-friable asbestos disposal area. Four samples were <br /> collected from monitoring locations on the predominant downwind side of the disposal area and <br /> one sample from the prevailing upwind side of the disposal area. The April 28, 2023 sampling <br /> locations are shown on the attached site map. Sampling procedures used during the April 2023 <br /> program followed those described in Appendix A. <br /> Fiber samples were collected on mixed cellulose ester filter cassettes using battery-powered air <br /> sampling pumps. Each pump was placed at the designated monitoring location within the <br /> disposal area fence line and connected using a small diameter plastic hose to the filter at <br /> approximate breathing zone height (2 meters above ground surface). The air sampling pumps <br /> were calibrated before and after sampling using an electronic bubble flow meter or a rotometer. <br /> The start and end times for each sampler were recorded and used to calculate the total amount of <br /> air sampled. <br /> 6280 San Ignacio,Suite P•San Jose,California 95119-1363 •Tel:408.281.2322•Fax:408.281.2722 •www.fieldsolutionsinc.com <br />