Laserfiche WebLink
07 January 2004 <br /> AGE-NC Project No. 02-0970 <br /> Page 2 of 4 <br /> Geology, 1977).Rocks composing the basement complex of the Province have not been completely <br /> defined but are believed to be metamorphic and igneous in origin. <br /> The closest surface water feature to the site is the South Fork of Little John Creek is located <br /> approximately 2,000 feet south of the site. Water from the creek drains into the San Joaquin River <br /> Deep Water Channel. <br /> The Modesto, Riverbank and Turlock Lake Formations and overlying Recent alluvium are the <br /> principal sources of domestic ground water in the 13,500-square mile San Joaquin Valley Ground <br /> Water Basin(Basin 5-22). The sedimentary units are relatively horizontal and continuous over the <br /> �• area. The estimated depth to ground water at the site is approximately 80 to 90 feet below surface <br /> grade (bsg),based on the map titled Lines of Equal Depth to Groundwater, Spring 1999 published <br /> by the San Joaquin County Flood Control District and Water Conservation District(FCD&WCD) <br /> The map titled Lines of Equal Elevation of Groundwater, Spring 1999, also published by the <br /> FCD&WCD, provides indeterminate data concerning local ground water elevation and flow <br /> direction. The prevailing ground water flow direction east of Stockton generally ranges from west <br /> to southwest, but this may be greatly modified by local recharge and discharge patterns. <br /> `r 3.0. SOIL ASSESSMENT ACTIVITIES <br /> Its is AGE's understanding that petroleum hydrocarbon-impacted soil was encountered during the <br /> v performance of a dispenser island upgrade.Based on the findings of investigation performed during <br /> the dispenser island upgrades, the EHD required further investigation of the area northwest of the <br /> dispenser island. <br /> 3.1. PROCEDURES <br /> On 08 November 2002, AGE advanced one soil probe borings using GeoProbe "direct-push" <br /> techniques near the northwest side of the dispenser island(Figure 2). The boring was advanced to <br /> approximately 20 feet below surface grade(bsg).Soil samples were collected from the boring at five- <br /> foot intervals beginning at five feet bsg. <br /> 3.2. SOIL SAMPLE ANALYSIS <br /> Selected soil samples were analyzed by a State of California Department of Health Services(DHS)- <br /> certified laboratory for the following constituents: <br /> Advanced GeoEnvironmental,Inc. <br /> v <br />