SITE INFORMATION AND CORRESPONDENCE

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S..0 NOR-CAL BEVERAGE CO., INC. 2286 STONE BLVD. - WEST SACRAMENTO, CA 956914047 - (916) 372-0600 - FAX (916) 372-3541 July 2 , 1991 L i V EL") Ms . Diane Hinson J U L 81991 Public Health Services San Joaquin County Environmental Health Divi si VIRONMENTAL HEALTH P.0 Box 2009 PERMIT/SEfiVICE5 Stockton, CA 95201 Dear Ms. Hinson: Enclosed is the Environmental Assessment Report for our site at 1800 East Fremont Street, Stockton, California, which was prepared as a result of a ground-water monitoring well installed at the site. One ground-water sample and two soil samples (of the thirteen soil samples taken at five foot intervals ) were submitted for chemical analysis . The ground-water analysis showed some small amounts of benzene and TPHG were present in the water. However, the benzene concentration was not substantially above the primary drinking water standard and it was Emcon ' s conclusion that ground water remediation is not warranted ( see page 8 conclusions and recomendations ) . There are two isolated areas of contamination that remained after the second soil excavation was done to remove the contaminated soil that soil samples showed remained after initial excavation. As you know there were three tanks removed from the sight , starting at the North was a 1000 gallon tank, next South of the 1000 gallon tank was a 500 gallon tank and the third most Southern was a 10 , 000 gallon tank ( see figure 3 in report) . The two small tanks were the oldest tanks of the three, having been on site when the property was first occupied. The 10 , 000 gallon tank was much newer having been installed by Nor-Cal Beverage at a later date. There were five soil samples taken initially after the tanks were removed. Of the five samples , three showed high contamination levels ( 9 , 100 , 12, 000, and 30 , 000 mg/kg) and were at the Northern end of the pit under and around the two smaller and older tanks as one might have expected. The two other samples from the middle and southern part of the hole under the newer 10 , 000 gallon tank showed small levels of contamination of 160 and 340 mg/kg( see figure 3 in report) . Considering the above five samples it was decided to do additional excavation to try to remove all contaminated soil . The hole was extended to the East and South up to a depth of 24 feet as contamination dictated, but additional excavation to the West and North was limited by property lines and the existing building to the North. After the over excavation, 14 additional samples were taken from the bottom and side walls . Of the 14 samples , 7 showed ND(none