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Fi <br /> July 1,2002 <br /> NOA ENVIRONMENTAL PROJECT NUMBER LE02-233 <br /> I <br /> This unit is 50 percent Jacktone clay and 35 percent Urban land. The components of <br /> this unit occur as areas so intricately intermingled that it was not practical to map <br /> them separately at the scale used (USDA, p.76). <br /> Included in this unit are small areas of Hollenbeck and Stockton soils in landscape <br /> positions similar to those of the Jacktone soil_ Also included, on the slightly higher <br /> parts of the landscape, are small areas of Jacktone soils that have moderately coarse <br /> textured or moderately fine textured overwash. Included areas make up about 15 <br /> percent of the total acreage(USDA, p.76). <br /> The Jacktone soil is moderately deep to a hardpan and is somewhat poorly drained. <br /> It formed in alluvium derived from mixed rock sources... Typically,the surface layer <br /> is very dark gray and dark gray clay about 22 inches thick(USDA, p.76). <br /> ' Permeability is slow in the Jacktone soil. Available water capacity is moderate. The <br /> shrink-swell potential is high(USDA, p.76). <br /> Urban anlandconsists of areas covered by roads driveways, sidewalks, parking lots, <br /> { buildings, and other structures. The soil material under the impervious surface is <br /> { similar to that of Jacktone clay(USDA, p.76). <br /> IV. REVIEW OF REGIONAL AND LOCAL REGULATORY AGENCY <br /> RECORDS <br /> 1. Regional Water Quality Control Board <br /> Our office reviewed the Leaking Underground Storage Tanks List (LUST) and the Spills, Leaks, <br /> Investigations, and Cleanups List (SLIC) on file with the Central Valley Regional Water Quality <br /> Control Board (CVRWQCB)in an attempt to determine if there are any files present at that agency <br /> which note the unauthorized release of a tonic or hazardous agent into the environment on the subject <br /> Eli property or within a one-quarter (114) mile radius of the subject property. <br /> Our office reviewed the CVRWQCB Leaking Underground Storage Tank Information System list <br /> dated September, 2001. The subject property was not listed on the database at the time that we <br />+ reviewed it. The CVRWQCB reports that there are no(0)correlations between the database and any <br /> addresses within 1/4 mile of the subject property. <br /> According to the CVRWQCB SLIC/DOD/DOE (Spills, Leaks, Investigations, and Cleanup <br /> Sites/Federal Department of Defense Sites/Federal Department of Energy Sites) list dated January, <br /> 5 <br /> M <br />