SITE INFORMATION AND CORRESPONDENCE

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San Joaquin County a oP " Environmental Health Department DIRECTOR ?• ' —� •� Donna Heron, REHS 600 East Main Street y[ 'li A t PROGRAM COORDINATORS i Stockton , California 95202 -3029 Robert McClellon, REHS •• Jeff Carruesco, REHS RDI oq N P Website: www.sjgov. org/ehd Kasey Foley, REHS � r FO Linda Turkatte, REHS Phone: (209) 468-3420 1f0 Fax: (209) 464-0138 1F ro\ June 29 2011 David Guardino and Pat Guardino Guardino and Crawford Construction 517 W. Fremont St, Stockton, CA 95201 Subject: Guardino and Crawford ROM 0270 517 W . Fremont St. LOP Case#: 1112 Stockton , CA 95201 Geotracker ID#: T0607700124 The San Joaquin County Environmental Health Department (EHD) has received Remedial Action Work Plan (RAP- WP) dated April 26 , 2011 , prepared by your consultant, Advanced GeoEnvironmental , Inc. (AGE) . The RAP-WP is in response to the positive results of the combination insitu air sparge (IAS) and soil vapor extraction (SVE) pilot test that was conducted over a 72-hour period in June 2010 . Based on this, your consultant has submitted the design specifications to install and activate IAS/SVE as the full remedial action . Also included in the RAP-WP were the specifications and locations of one additional SVE well and four additional IAS wells onsite. Before the EHD can complete our review of the RAP-WP and provide a tentative approval , some additional information is required. California Code of Regulations (CCR, Title 23 , Division 3 , Chapter 16, section 2728) requires that the public be notified prior to enactment of a corrective action and be provided with a comment period . In order to satisfy this requirement, please submit an executive summary so that the EHD may post the site and advise the public of the intent to conduct a corrective action. The executive summary is a short concise document, written so as to be understandable to the general public and is limited to one page of paper with no letterhead/business name present. Please include a very brief, non-technical history of the site, a brief description of the action you are proposing , the expected time the action will be active, a description of the impact(s), if any, that the public in the area could be exposed to, and how the site will remain after the action is completed . After the EHD receives and approves the executive summary, the EHD will post the site and the public will be provided a 30-day comment period to contact the EHD with any questions or complaints they may have. If no significant objections are received by the public at the end of the public comment period , the EHD will advise you that you may implement the RAP-WP .