ARCHIVED REPORTS_XR0009978 - Laserfiche WebLink

Home Browse Search

I ' Preliminary Investigation and Evaluation Report • PREM DOR ' 433 West Scotts Avenue, Stockton, California ' 1.0. INTRODUCTION ' At the request of Dr Sonya Olbrantz of Masonite International,Advanced GeoEnvironmental, Inc (AGE) has prepared the enclosed Preliminary Investigation and Evaluation Report (PIER) for 433 West Scotts Avenue, Stockton,California(site) The purpose of this investigation was to assess ' the lateral and vertical extent of petroleum hydrocarbon impacted soil and groundwater at the site The scope of work included establishment of three soil borings, collection and analysis of soil and `grab' groundwater samples and preparation of this report of findings The location of the site is ' illustrated on Figure 1 A plan of the site is illustrated on Figure 2 This report has been prepared in accordance with guidelines issued by the Central Valley Regional I Water Quality Control Board (CVRWQCB) for subsurface investigations of underground storage tank(UST) systems ' 2.0. BACKGROUND The site is on West Scotts Avenue approximately 250 feet east of the intersection with Lincoln Street, in an industnal/commercial area of West Stockton (Figure 2) The site is situated in an area ' of low topographic relief at an estimated elevation of 13 feet above sea level(Figure 1) The property is currently occupied by the Prem Dor Corporation I21 REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The site is situated within the southern portion of the Great Valley Geomorphic Province of California, a large, elongate, northwest trending, asymmetric structural trough, the northern and southern portions of the Province have been designated the Sacramento and San Joaquin Valleys, respectively The Province is bordered by the Coast Ranges to the west,the Klamath Mountains and Cascade Range to the north, and the Sierra Nevada to the east The Great Valley has been filled with sediments derived from both marine and continental sources Thickness of the sedimentary fill ranges from thin veneers along the valley edges to more than 20,000 feet in the south central portion of the valley The sedimentary formations range in age from IJurassic to Recent,with the older deposits being primarily marine in origin and the younger deposits being primarily continental Continental-denved sediments were primarily deposited in lacustrine, fluvial,and alluvial environments with sediment sources being the mountain ranges surrounding the valley, the site itself is located on unconsolidated and semi-consolidated alluvium, lake, playa and terrace deposits of Quaternary age Rocks composing the basement complex of the Province have Inot been completely defined but are believed to be metamorphic and igneous in origin Advanced GeoEnvironmental,Inc I