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\r' V <br /> 1"r San Joaquin Valley <br /> Air Pollution Control District 4�r, <br /> F�I� <br /> D <br /> Co,�m� oT 2n/�U��5c�2 <br /> October 23, 2002 <br /> Jennifer Jolley /ljUEpt <br /> San Joaquin County <br /> Community Development Department <br /> Development Services Division <br /> 1810 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> SUBJECT: PA-0200377 (QX) QUARRY EXCAVATION APPLICATION FOR <br /> GRANITE CONSTRUCTION. <br /> Dear Ms Jolley: <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 EPA <br /> and by the Air Resources Board (ARB) for 03 (ozone) and PM-10 (fine particulate <br /> matter, dust). The Federal Clean Air Act (CAA) and the California Clean Air Act require <br /> areas that are designated nonattainment to reduce 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 an existing quarry operation. Therefore, <br /> provided the current operation is not expanded, this project will most likely result in no <br /> net increase in emissions and therefore represents a less-than-significant impact of the <br /> ambient air quality and a negative declaration would be appropriate from an air quality <br /> perspective. Please note, however, that the California Air Resources Board has <br /> identified the particulate matter component of diesel exhaust as a Toxic Air <br /> Contaminant. As a result, projects using large numbers of diesel engines onsite or that <br /> have large numbers of idling trucks could result in a negative impact on sensitive <br /> receptors if any are located near the project site. The ARB is currently developing <br /> guidance for evaluating this type of impact. <br /> The construction/operational phase of this project can generate emissions from the <br /> movement of soil, use of heavy equipment, bulk materials handling, asphalt paving and <br /> other related activities. As a result, this project is subject to District Regulation VIII <br /> (Fugitive Dust Prohibitions). The purpose of Regulation VIII is to reduce the amount of <br /> fine particulate matter (PM-10) entrained into the ambient air from man-made sources. <br /> Regulation VIII has recently been revised, with the revisions becoming effective May 15, <br /> 2002. The applicant may review these changes on the District web site at <br /> David L. Crow <br /> Exe-_the Director/Air Pollution Control Officer <br /> Northern Region Office Central Region Office Southern Region Office <br /> 4230 Kiernan Avcnue, Suite 130 1990 East Gettysburg Avenue 2700 M Street, Suite 275 <br /> hindesto, CA 9;336-9322 Fresno, CA 93726-0244 Bakersfield, CA 93301-2373 <br /> (2(191 ;;7-6300 • FAX (209) 557-6475 i59) 230-6000 • FAX (559) 230-6061 (661) 326-6900 • FAX (661) 3264,905 <br /> wwrc.valleyaieorg <br />