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09:37 SEP 19, 2006 ID: SJVAPCD CENTRAL FAX N0: 221-4269 *4197 PAGE: 2/3 September 19, 2006 Reference# 200601957 Kevin Swanson San Joaquin County Community Development 1810 East Hazelton Avenue Stockton, CA 95205 Subject: PA-0600457 (SA) — Lockeford Community Service District Wastewater Treatment Plant Expansion Dear Mr. Swanson: The San Joaquin Valley Unified Air Pollution Control District (District) has reviewed the project referenced above and offers the following comments: The entire San Joaquin Valley Air Basin is designated non-attainment for ozone and particulate matter (PM10 and PM2.5). This project would contribute to the overall decline in air quality due to construction activities in preparation of the site and ongoing operational emissions. The increase in emissions from this project, and others like it, cumulatively reduce the air quality in the San Joaquin Valley. The expansion of the wastewater treatment plant (WWTP) and changes to the treatment process may require new or modified District permits. Prior to construction, the District will require the Lockeford Community Service District to submit an application for an Authority to Construct (ATC) for the wastewater treatment process in order to determine permit applicability. For further information or assistance, please contact the District's Permits Services Division at (559) 230-6000. Based on the information provided, the proposed project will be subject to the following District rules. The following items are rules that have been adopted by the District to reduce emissions throughout the San Joaquin Valley, and are required. This project may be subject to additional District Rules not enumerated below. To identify additional rules or regulations that apply to this project, or for further information, the applicant is strongly encouraged to contact the District's Small Business Assistance Office at (559) 230- 5888. Current District rules can be found at http://www.valleyair.org/rules/lruleslist.htm. Regulation Vill (Fugitive PM10 Prohibitions) Rules 8011-8081 are designed to reduce PM10 emissions (predominantly dust/dirt) generated by human activity, including construction and demolition activities, road construction, bulk materials storage, paved and unpaved roads, carryout and track out, landfill operations, etc. The District's compliance assistance bulletin for construction sites can be found at http://www.valleyair.org/busind/comply/PM10/Rep VIII CAB.pdf. If a non-residential project is 5.0 or more acres in area or will include moving, depositing, or relocating more than 2,500 cubic yards per day of bulk materials on at least three days, a Dust Control Plan must be submitted as specified in Section 6.3.1 of Rule 8021. Construction activities shall not commence until the District has approved the Dust Control Plan. A template of the District's Dust Control Plan is available at http//www vallevair ora/busind/comply/PM10/forms/DCP-Form.doc