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` 0 0 SAN JOAQUIN —COUNTY_— . ' Greatness 9rcarrs ))ere July 28, 2017 Adam Mumford Air Quality Inspector II San Joaquin Valley Air Pollution Control District Northern Region Compliance 4800 Enterprise Way Modesto, California 95356-8718 Department of Public Works Kris Balaji, Director of Public Works Fritz Buchman, Deputy DirectorlDevelopment Michael Selling, Deputy Director/Engineering Jim Stone, Deputy Director/Operations Najee Zarif, Interim Business Administrator SUBJECT: ANNUAL REPORT, FOOTHILL SANITARY LANDFILL LFG FLARE SJVAPCD PERMIT N-4070 Dear Mr. Mumford: This Annual Report is submitted in compliance with Code of Federal Regulations (CFR) Part 40, Section 60.757(f) for the landfill gas (LFG) collection system at the Foothill Sanitary Landfill. This regulation requires that San Joaquin County report information as described in Section 60.757 (f)(1) through (f)(6). This report addresses LFG collection system expansion in 2016. (1) The value and length of time for exceedance of applicable parameters monitored under Section 60.756 (a), (b), (c), and (d): There were no exceedances for this time period. Following is a description of compliance under those subsections of Section 60.756: (a) A sampling port and thermometer is installed at each LFG collector (vertical well of horizontal LFG collector). These are monitored monthly for well head pressure, nitrogen or oxygen concentration, or gas temperature. (b) Does not apply: this is an open flare used as a backup; this provision refers to "enclosed combustors". (c) For an open flare: (1) A thermocouple (heat sensing device) is installed to continuously sense and verifies the continuous presence of flame, or lack thereof. This temperature is continuously displayed and recorded when the flare is in operation. (2) The flow rate of LFG to the flare is also continuously displayed and recorded. (d) LFG is being diverted to a LFG-to-energy plant (Facility N-8247-1, N-8247-2, or N-8247-3) owned by Ameresco/San Joaquin LLC (Figure 1). Ameresco/San Joaquin LLC will submit annual reports for that facility. (2) Landfill gas was diverted continuously to the LFG-to-Energy Plant during the reporting period. Diversion of LFG to the Plant is in accordance with Authority to Construct Permit No. N-4070-1-6. The control devices at the LFG-to-Energy plant was operational at all times when LFG was flowing to the plant. During the short time during which LFG was not sent to the LFG-to-Energy plant, the control device (the flare) was operational. (3) There were no periods when the collection system was non -operational for more than five days. (4) There were no exceedances of surface emissions during this reporting period.