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.L <br /> Quarterly Summary Report <br /> f o r <br /> The Pestana Trust Property <br /> 275 Grant Line Road, Tracy, CA <br /> Site #2435 <br /> SITE LOCATION AND DESCRIPTION <br /> The sub)ect site is located an an area of mixed commercial , <br /> residential , and light-industrial usage in the northeastern <br /> portion of the City of Tracy (San Joaquin County) , CA. <br /> It is a rectangular parcel consisting of approximately <br /> 17 ,070 square feet . The site is paved an asphalt and <br /> contains one, single-story building that originally housed <br /> the office and service bays for a retail fuel service <br /> station. In recent years, the building has been used by a <br /> variety of small , repair and rental businesses . The site <br /> is presently vacant and unused <br /> SITE GEOLOGY AND GEOHYDROLOGY <br /> The Water Works Corp. (a former environmental consultant to <br /> the property owner) reported an a September, 1991 document <br /> prepared for property also located at East Street and Grant <br /> Lane Road that the sub]ect intersection as located on <br /> (essentially) level terrain underlain by Pleistocene and <br /> Holocene age flood plain deposits composed of sediments <br /> similar to, and probably conformable to underlying deposits <br /> of alluvium and the Tulare formation <br /> The flood plain deposits are light to dark-brown and grey <br /> clay, salty sand, and organic materials with locally high <br /> concentrations of salt and alkali Stream channel deposits <br /> of sand and gravel are also present . <br /> Groundwater as less than ten feet below grade throughout <br /> most of the Tracy area. Groundwater flow as generally to <br /> the north. The flood plain deposits of the shallow water <br /> bearing zone have well developed soil profiles and poor <br /> permeability. The base of this zone is poorly defined and <br /> probably as from five to twenty feet below ground surface <br /> OVERVIEW OF PAST ENVIRONMENTAL COMPLIANCE ACTIVITIES <br /> PERFORMED AT THE SITE <br /> In their March, 1993 Report of Findings , Applied <br /> Environmental Solutions, Inc. (AES) of San Jose, CA <br /> indicated that detectable concentrations of Total Petroleum <br /> Hydrocarbons as Gasoline (TPH-G) , toluene, ethylbenzene, <br /> Page 2 <br />