SITE INFORMATION AND CORRESPONDENCE

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24 June 2005 AGE-NC Project No. 99-0624 Page 2 of 3 (3) will be located south of the former UST; and one boring (4) will be located down- gradient of the former UST pit(southeast). One or more of these borings may be completed as soil-vapor extraction(SVE)wells;the necessity for SVE wells will be determined based on two factors, 1) the presence of visibly stained soil with obvious hydrocarbon odor, and 2) the presence of volatile organic carbon detected by an organic vapor analyzer (OVA) equipped with a photo-ionization detector (PID: Thermo Environmental 580B, 10.0 eV, calibrated to isobutylene).The screen interval oflthe vapor well(s)will not be less than 5 feet or greater than 20 feet in length; the target depth of the well(s)will be determine based on field conditions. The construction of the well(s) will be consistent with standard practices and procedures for soil-vapor extraction well installation. If SVE well(s) are not required, the southernmost boring (4) will be completed as a monitoring well. Procedures for the installation, construction and sampliing of the monitoring wells were described in the AGE-prepared Revised Site Assessment Work Plan(February 2005).A soil boring permit will be obtained from the EHD. A site specific Health and Safety Plan (SHSP) will be prepared in accordance with the Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety and Health Administration) and federal (29 CFR 1910.120)and state(Title 8,Cal.Code Reg., Section 5192)regulations.The SHSP will cover: • Health and safety officer and key personnel,and personnel requirements and responsibilities. • Field activities, overall work practices and stand and operating procedures (SOP). • On-site chemicals and potential hazardous subsltances as well as physical hazards. • Risk analysis for existing site conditions, and d scriptiori of personal protective equipment to be used by personnel. • Site control measures,including work zones and security measures,and entry procedures for confined spaces. • Exposure monitoring plan with monitoring methods, emergency response plan addressing hazardous material/waste releases, and medical surveillance requirements. All field personnel will be trained in hazardous materials communication and will have completed a 40-hour Health and Safety Course as specified in OSHA Hazardous Waste Operations and Emergency Response Standard [29 CFR 1910.120(e)], and 8-hour annual refresher courses as necessary. Site-specific information regarding the release of chemicals into the subsurface will be provided to the general public, in the form of postings at the site. Additional information regarding site information will provided to parties upon request where and when available. Advanced GeoEuvironmental,Inc.