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�- Delta , <br /> ///Ak <br /> Environmental <br /> Consultants, lnc,. <br /> 3330 Data Drive. Suite 100 <br /> Rancho Cordova. CA 95670 <br /> 9161638-2085 <br /> FAX 9161638-8385 <br /> December 17, 1990 <br /> Mr Bill Gard <br /> President <br /> Delta Bay Builders, Inc. <br /> Post Office Box 99 <br /> Antioch, California 94509 <br /> Subject- Soil Analytical Results <br /> 2000 Stinson Street, Stockton, California <br /> Delta Project No. 40-90-024 <br /> Dear Mr. Gard- <br /> On October 24, 1990, Delta Environmental Consultants, Inc. (Delta),,collected three soil samples <br /> approximately five and a half feet below the north end of the concrete slab used to anchor the former <br /> underground storage tanks at the subject site (see enclosed figure). Methods used for the collection of <br /> these soil samples are described in Enclosure A. Ground water was not encountered in any of these <br /> hand borings No odor or discoloration of the soil was noticed in sod Samples Nos. 1 and 2. Soil <br /> Sample No. 3 had a slight petroleum odor and was slightly discolored Soil sample analytical results are <br /> summarized in Table 1 Copies of the certified laboratory analytical results are contained in <br /> Enclosure B <br /> TABLE 1 <br /> Soil,Skmple Analytical Results <br /> Concentrattp* in Parts Per Million (ppm) <br /> Oct9ber 24, 1990 <br /> Depth (feet Ethyl- TPH as TPH as <br /> Location below aradel Benzene TTt ie�ne benzene Xylenes Diesel Jet u l <br /> HB-1 5.5 <0.005 <0.005 <0.005,_, <0.005 . <1.0 1.0 <br /> HB-2 5.5 <0.005 <0.005 <0.005 <0 005 <10 <1.0 <br /> HB-3 55 <0.005 <0,005 - <0 005 <0.005 11 14 <br /> 4� <br /> Practical Solutions to Environmental Concems <br />