SITE INFORMATION AND CORRESPONDENCE_FILE 2

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��-�-;� ENVIl2tJNMENTAL ENGINEERING & CONTRACTING, INC. 501 Parkcenter Drive, Santa Ana, CA 92705 Phone (714)667-2300 Fax (714)667-2310 Executive Summary Removal of Petroleum Hydrocarbon-Impacted Soil UniFirst Facility 819 N.Hunter Avenue Stockton,CA UniFirst Corporation (UniFirst) operates an industrial laundry facility located at 819 North Hunter Street, Stockton, California. The subject site is currently undergoing redevelopment. A new industrial laundry facility has been constructed on the northern half of the subject site. The southern half of the site is currently undergoing grading for construction of loading ramps and parking lot. Background On Thursday December 11,2003, oil from an unknown source began accumulating on rainwater which had ponded on an unpaved portion of the subject site. The oil/water mixture spread over an area of approximately 40 feet by 50 feet in dimension and by I-to 6-inches in depth. The oil was completely contained within the site. By evening of the same day,the oil/water mixture had been completely removed by vacuum trucks,and the oil had ceased flowing. On Friday December 12, 2003, the source of the leak was determined to be a previously unidentified underground storage tank (UST). Apparently, the release of oil occurred when rainwater entered an open fill pipe on top of the tank, displacing the lighter oil within the tank. Laboratory analyses indicate that the oil has characteristics of diesel fuel,however, is more likely a fuel oil. Remediation The oil spill has resulted in the contamination of soil in an area approximately 50 feet by 40 feet in dimension and 2 inches in depth. The purpose of the proposed site remediation is to remove the impacted soil. The work will include the following: 1) Prepare and implement a site specific Health and Safety Plan to protect onsite workers and the public from exposure to the oil;2)obtain approval of this workplan by the SJCDEH; 3) excavate petroleum-impacted soil and soil with obvious hydrocarbon odor to minimize potential health and safety concerns associated with construction occurring in the area and public safety as a whole; 4) collect confirmation soil samples per the direction of the SJCDEH; 5) submit soil samples for analyses of hydrocarbons and volatile organic compounds; 6) dispose of soil at an appropriate landfill; and submit a final report to SJCDEH presenting the findings of the assessment and remediation activities. Upon concurrence of the SJCDEH that the remediation is complete, construction activities will resume.