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9 «t <br /> Geo-Logic <br /> A S S O C I A T E S <br /> Geologists,Hydrogeologists and Engineers <br /> July 15, 2011 <br /> JN: 2011-0050 <br /> Forward Landfill <br /> 9999 South Austin Road <br /> Manteca, CA 95336 <br /> Attention: Mr. Don Litchfield <br /> RE: ASBESTOS MONITORING REPORT <br /> FORWARD LANDFILL <br /> FIRST HALF 2011 SEMIANNUAL REPORT <br /> MANTECA, CALIFORNIA <br /> INTRODUCTION <br /> Geo-Logic Associates (GLA)presents this first 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 June 22, 2011 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 wind <br /> direction obtained from the onsite historical meteorological station. Air samples were <br /> collected simultaneously from each location over an eight-hour period during normal <br /> 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 /> was a 25 millimeter diameter encased conductive cassette with a 0.45 micron mixed <br /> cellulose ester membrane. The pumps used for sampling were GilAir-5 constant flow air <br /> sampling pumps with a flow capacity of 1 to 5 liters per minute (L/min). The built-in <br /> rotameters on the GilAir-5 pumps were pre-tested (calibrated) using a dry reference <br /> standard flow meter. <br /> Sampling was conducted on June 22, 2011 and completed over an eight hour sampling <br /> period. During the sampling period, Del-Tech personnel visually checked the sampling <br /> 11415 West Bernardo Court, Suite 200, San Diego, California 92127 Phone: (858)451-1136 FAX: (858)451-1087 <br />