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Quarterly Summary Report <br /> ✓ f o r <br /> The Pestana Trust Property <br /> 275 Grant Line Road, Tracy, CA <br /> SJCo PHS/EHD Site #2435 <br /> SITE LOCATION AND DESCRIPTION <br /> The subject site is located in 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 o-2 approximately <br /> 17 , 070 square feet . The site is paved in 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 /> presently vacant and unused, is surrounded by a six foot <br /> high wire mesh security fence . <br /> SITE GEOLOGY AND GEOHYDROLOGY <br /> The Water Works Corp . (a former environmental consultant to <br /> the property owner) reported in a September, 1991 document <br /> prepared for property also located at East Street and Grant <br /> Line Road that the subject intersection is 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 , silty 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 is less than ten feet below grade throughout <br /> most of the Tracy area . Groundwater flow is 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 is 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 /> 'fir Environmental Solutions , Inc . (AES) of San Jose, CA <br /> Page 1 <br />