Laserfiche WebLink
Geological Technics Inc. <br /> 1101 7`h Street <br /> Modesto,California 95354 <br /> f i (209)522-4119/Fax(209)522-4227 <br /> I <br /> Revised Work Plan for <br /> Additional Dual Phase Extraction <br /> Pilot Test <br /> Mard Property <br /> ` 2969 Loomis Road <br /> Stockton, California <br /> Project No. 770.2 <br /> January 23, 2009 <br /> { 1.0 INTRODUCTION <br /> An underground storage tank containing diesel fuel was formerly located on the property — <br /> see Figures 1 & 2: A previous consultant, Wm. J. Hunter&Associates (WJH), installed four <br /> groundwater monitoring wells in an effort to determine if diesel fuel had impacted <br /> groundwater. In 1992; diesel contamination was detected in groundwater at the site. The San <br /> r? Joaquin County Public Health Services/Environmental Health Division (SJC PHS/EHD) <br /> i.t subsequently directed that an investigation of the diesel release be initiated. <br /> ' The work performed to date is summarized below*: <br /> r • March 1987 —Two 5,000g <br /> ' allon diesel USTs removed. <br /> • March 1988 — UST excavation deepened to 29 feet below grade surface (bgs). <br /> Excavation was filled with clean backfill. <br /> r • April 1992 — Three groundwater monitoring wells installed (MW-1 through MW-3), <br /> Wm. J. Hunter&Associates. <br /> ' • May 1996—A single soil boring (LB-1) to 80 feet bgs installed, Lush Geosciences. <br /> • September 1997- Well MW-4 installation, Wm. J. Hunter& Associates. <br /> r • August 2000 — Two shallow wells (MW-5 & MW-6) and one deep well (MW-105) <br /> installed, Geological Technics Inc. (GTI) <br /> • May 2002 - Two shallow wells (MW-7 & MW-8) and two deep wells (MW-104 & <br /> MW-106) installed, GTI. <br /> II <br /> _ E <br />