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Limited Phase II Environmental Site Assessment United Storage 2115 West Washington Street Stockton, California Delta Project No. A002-124-1 Page 2 8,900 square meters in size. The property, buildings, tanks, and dock lines are owned by United Storage and are operated as a bulk storage and distribution facility for animal feed products. The access road is leased from the Port of Stockton. Thirty-two aboveground storage tanks (ASTs), with a total storage volume of approximately 27,870 cubic meters, are located at the property. A tank inventory conducted in May 2002 documented the storage of the following products: molasses, whey, water, fat, vegetable oil, steepwater, UltraFerm, Pre-Gel, Masonex, urea, 10-34-0, salt, ammonium sulfate, magnesium chloride, phosphoric acid, hydrochloric acid, dolomite, limestone, potash, and dry clay. For a detailed presentation of the site history, environmental setting, and facility operations, refer to the ARCADIS G&M Phase I EAS (Appendix A). 3.0 FIELD PROCEDURES AND OBSERVATIONS 3.1 Justification for Borehole Placement Delta proposed the advancement of ten soil borings at the subject property based on the results of the ARCADIS G&M Phase I EAS (Appendix A). Justification for the location of each borehole is summarized below: • B-1 Positioned near a former diesel underground storage tank (UST) • B-2 Positioned near a former gasoline UST • B-3 Positioned near a former UST (contents unknown) • B-4 Positioned near a former UST (contents unknown) • B-5 Positioned in an area of historical UN32 release(s) • B-6 Positioned adjacent to an AST that has contained UN32 • B-7 Positioned adjacent to an AST that has contained fuel oil • B-8 Positioned adjacent to an AST that has contained fuel oil • B-9 Positioned in an area of observed soil staining, new tank No. 45 (contains fuel oil) • B-10 Positioned near the downgradient edge of property to assess overall ground water quality 3.2 Underground Utility Clearance Prior to the start of drilling, underground utilities were located by utility company representatives with the assistance of Underground Service Alert (USA) One Call (Ticket No 406077). Soil boring locations were further cleared by Cruz Brothers, an underground utility locating service, and by the site contact, Mr. Dale Matthews of United Storage. e: \ westwayterminalco \a002124 \1-stockton, ca \docs \stockton phase ii report.doc