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16rASan .Joaquin valley <br /> Air Pollution Control District <br /> NOL/ <br /> November 16, 1999 �d <br /> Kai Luoma <br /> San Joaquin County <br /> Community Development Department <br /> Development Services Division <br /> 1810 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> SUBJECT: QUARRY EXCAVATION - REMOVAL OF 2.5 MILLION TONS OF SAND <br /> AND GRAVEL OVER A PERIOD OF TWELVE YEARS (QX-99-2) <br /> Dear Mr. Luoma: <br /> The San Joaquin Valley Air Pollution Control District (District) has reviewed the <br /> proposed project and offers the following comments: <br /> The San Joaquin Valley's air quality has been designated nonattainment by the <br /> Environmental Protection Agency (EPA) and by the Air Resources Board (ARB) for <br /> ozone and PM-10 (fine particulate matter, dust). The Federal Clean Air Act (CAA) and <br /> the California Clean Air Act require areas that are designated nonattainment to reduce <br /> emissions until standards are met. <br /> Based on the information provided, it appears that this project does not represent an <br /> expansion, but only additional phases to a existing quarry operation. Therefore, <br /> provided the current operation is not expanded, this project will most likely result in a <br /> less-than-significant impact on the ambient air quality and a negative declaration would <br /> be appropriate from an air quality perspective. Please note; however, that the California <br /> Air Resources Board has identified the particulate matter component of diesel exhaust <br /> as a Toxic Air Contaminant. As a result, projects using large numbers diesel engines <br /> onsite or that have large numbers of idling trucks could result in a negative impact on <br /> sensitive receptors if any are located near the project site. The ARB is currently <br /> developing guidance for evaluating this type of impact. <br /> This project can generate emissions from the movement of soil, use of heavy <br /> equipment, bulk materials handling, asphalt paving and other related activities. As a <br /> result, this project is subject to District Regulation VIII (Fugitive Dust Prohibitions). The <br /> purpose of Regulation VIII is to reduce the amount of fine particulate matter (PM-10) <br /> entrained into the ambient air from man-made sources. The attached Synopsis <br /> highlights many of the requirements contained within Regulation VIII. The Synopsis is <br /> not meant to be all-inclusive, but it can be a useful compliance aid in the field and office <br /> alike. David L. Crow <br /> Executive Director/Air Pollution Control Officer <br /> Nonliern Region Orrice Centra! Region O:tice Snutl;ern n7 n,n <br /> 4230 Kiernan Avenue. Suite 130 1990 East Gettysburg Avenue 2700.til Street, SuJn^ <br /> Modesto,CA 95356-9321 Fresno,CA 93726-0244 Bakersfield.CA 533111-23-0 <br /> 12091 SS7-6400•FAX(2091 557-6475 (559)230-6000•FAX(559)230-6061 (661)326-6900 4 FAX((A 1) 'i36-69745 <br />