Laserfiche WebLink
L `y �'.i ti �"'.Y ti:` -' �4".r�^ :�J �, f�,��"' �' ..s�" +.�- p�},v � ,��,-+.%R' �,r'�.,'s• <br /> r <br /> .N <br /> than 9.5 COM to create a cone of depreseian around the well b,3re. T�,+,s cora-will <br /> tausa the prciduct to preferenti,lly flew towards the well and increase. the <br /> ef, eetive, p_oducr .thickness, resulting in mors efficient removal. <br /> 5.3 GR.OUNTiVA-fFF: GRADIENT <br /> WatOz level -aeasure mcnts taken in wells 117-1 t4rough VW-4 in January 198; <br /> indicateu a local southerly gradient. A review of available geohydrological data <br /> from San Joaquin County indicates that tho regional gradient in the vicinity of <br /> the Holt .brothers Facility is west_south-iest (San .ioaquia County, F;aoad Control <br /> - , d Water Conservation District, Spring 1989). Regional data projected across <br /> rhe subject site indicate a groundwater elevation of approximately -i5 feet mean <br /> seal level (MSL). Sun7eyed site data indicate that groundwater elevations in <br /> the new existing monitoring wElls vary between -16.78 feet MS', (MW-4) and -17,75 <br /> feet !MW-6) MSL (rigure 3). These data continue to indicate a local gradient <br /> hry to the south, as was seen in the initial studu in January 1989, of approximately <br /> 25 feet per mile. <br /> The Holt Brothers fac.i'."ity is located :early equi-distant from two <br /> Past/west-trendi-cg sloughs and/or river drainages. The Stockton Deep Water <br /> Cl-annel and tha-Hormon Slough are one mile north of the site. To the south and <br /> west lie tho Walker and Trench Camp Sloughs, an,i the San Joaquin River, <br /> respective�y, ' The local <br /> ,., groundwater gradient may be controlled by the presence <br /> of the sloughs and San Joaquin River south and west of the site. <br /> e;rt <br /> 6.0 SL SSIO SUM <br /> Based on all investigations to date, the following discussion of results <br /> is presented, <br /> 6,1 SOIL CONTAMINATION <br /> • Soil containing hydrocarbons is faLnd 65 f9et southwest and 55 feet <br /> southeast of Mw-1 (in the former tank location) between 10 to 20 feet <br /> SAC03.001 8 <br /> November 1989 <br />