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r <br />Geo -Logic <br />ASS O C 1 AT E S <br />Geologists, Hydrogeologists and Engineers <br />Forward Landfill <br />9999 South Austin Road <br />Manteca, CA 95336 <br />Attention: Ms. Erin Fanning <br />May 22, 2012 <br />JN: 2012-0025 <br />RE: ASBESTOS MONITORING REPORT <br />FORWARD LANDFILL <br />FIRST HALF 2012 SEMIANNUAL REPORT <br />MANTECA, CALIFORNIA <br />INTRODUCTION <br />Geo -Logic Associates (GLA) presents this second semiannual asbestos monitoring report <br />for the Forward Landfill in San Joaquin County, California. Asbestos monitoring was <br />performed in accordance with the Forward Landfill Solid Waste Facility Permit No. 39 - <br />AA -0015. Del -Tech Geotechnical Support Services (Del -Tech) performed the asbestos <br />monitoring on May 4, 2012 in accordance with the Air Monitoring Plan provided in <br />Appendix A. Laboratory analyses were performed by Asbestos TEM Laboratories, Inc. <br />(ATEML) of Berkeley, California, a state certified laboratory. The analytical laboratory <br />report and field data is presented in Appendix B. <br />SAMPLING PROCEDURES <br />As shown on Figure 1, five representative sampling locations were identified near the <br />asbestos operations area. Four sampling stations were located predominately downwind <br />and one sampling station (Sample Station A) was located predominately upwind from the <br />asbestos disposal area. Upwind and downwind locations were chosen based on historical <br />site observations. Air samples were collected simultaneously from each location over an <br />eight-hour period during normal working hours and typical landfill operating conditions. <br />Each sampling station consisted of a sampling pump (with a built-in rotameter), filter <br />cassette, connective tubing, and mounting materials. Each filter used for air monitoring <br />consisted of a 25 millimeter diameter encased conductive cassette with a 0.45 -micron <br />mixed cellulose ester membrane. The pumps used for sampling were GilAir-5 constant <br />flow air sampling pumps with a flow capacity of 1 to 5 liters per minute (L/min). The <br />built-in rotameters on the GilAir-5 pumps were pre -tested (calibrated) using a dry <br />reference standard flow meter. <br />Sampling was conducted on May 4, 2012 and completed over an eight hour sampling <br />period. During the sampling period, Del -Tech personnel visually checked the sampling <br />pumps on an hourly basis for fluctuations in the flow rate. After sampling was <br />11415 West Bernardo Court, Suite 200, San Diego, California 92127 Phone: (858) 451-1136 FAX: (858) 451-1087 <br />