SITE INFORMATION AND CORRESPONDENCE

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t `ow Mr. Russ Zelmer A,�� 7060 W. Durham Ferry Rd. FNVI 2009 Tracy, CA 95304 P� R �O�TIS�rrH Date: March 24 , 2009 VICES Subject: Access to Parking Lot at 7501 West Eleventh Street, Tracy, California far Groundwater Remediation Dear Mr. Zelmer: Since 1999. the San Joaquin Company Inc. (SJC), our consulting engineers, have been working under the direction of the San Joaquin Environmental Health Department (SJCEHD) to monitor and manage groundwater affected by releases of gasoline and diesel that occurred at the property at 7500 West Eleventh Street in Tracy, California, which I own jointly with my wife Annamae F. Navarra. That site is located across the highway from your property at 7501 West Eleventh Street. For the past several years SJC has been sampling groundwater in monitoring wells that are located on your property. At this stage of SJC's work we have been directed by the SJCEHD to actively remediate groundwater affected by gasoline and diesel that is located beneath the southeast corner of the parking lot at 7501 West Eleventh Street and beneath the adjacent land to the south. The remediation work involves excavation of one 70-ft. long by 4-ft. wide trench from which groundwater will be pumped directly into vacuum trucks and shipped off site for disposal. The soil excavated from the trench will be loaded into trucks and also directly shipped off site to a permitted disposal facility. To permit extraction of the groundwater, crushed rock will be placed into the trench excavation until the surface of the rock backfill is approximately one foot above the water table. Following extraction of the groundwater, the remaining depth of the trench will be backfilled with clean, compacted imported backfill over which 6 in. of mesh-reinforced concrete paving will be laid. After the trench is backfilled and the paving laid, the affected area of the parking lot will be cleared of all construction debris and sprayed with a bituminous seal coat, which will give the area a uniform dark color. Following that, the white lines that currently demarcate the parking spaces in your parking lot will be restored. During the time that the extraction trench is open and the construction crew is not present at the site, the work area will be enclosed within a locked, 6-ft. high, temporary, chain-link fence. The area of the parking lot that will be occupied by construction equipment and materials is shown on the Figure, but, in addition, it will be necessary for trucks to enter and leave the site via both the Chrisman Road and West Eleventh Street entrances.