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Geofogica(Tecfmics -7nc. <br /> 2741 WvvrWpad <br /> Modesto Carifonua 95351 <br /> (209)5 38-64241'TaC#5 38 5852 <br /> REPORT <br /> Groundwater Monitoring <br /> 4" Quarter 2000 <br /> Marei Property <br /> 2969 Loomis Road <br /> Stockton, CA <br /> Project No 770 2 <br /> January 30, 2001 <br /> i <br /> EXECUTIVE SUMMARY <br /> The site's seven groundwater monitoring wells are monitored and sampled on a quarterly <br /> schedule This report summarizes the 4"' Quatter 2000 round of groundwater monitoring <br /> and testing that took place on December 29, 2000 The analytical results frorn the wells <br /> indicate that detectable concentrations of diesel range petroleum hydrocarbons are present <br /> in five of the wells BTEX was detected in two of the groundwater wells <br /> The average depth to groundwater at the site was 57 41 feet bgs Groundwater gradient <br /> calculations show that groundwater flow was N47E with a slope of 0 0003 WE The site <br /> has a history of variable groundwater direction based on a previous consultant's data GTI <br /> has computed directions of south-southeast and northeast for the two events thus far <br /> completed <br /> 1.0 GROUNDWATER MONITORING <br /> 1 1.1 Hydrogeology of Site <br /> ' The site exhibits a primarily clayey geology with minor sand layers/lenses, pebbles, black <br /> . organics, and iron staining occasionally present The average groundwater elevation on <br /> I <br />