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3/14/2013 <br /> EAST MAIN STREET side"' <br /> <50 x/ <br /> Sidewalk Drivewa 130 }/ <br /> . Sidewalk <br /> cr <br /> 3/14/2013 - 6.1 <br /> x <br /> -- .-- \ <br /> <50 MW-3 450' <br /> 140 Lights <br /> O MW-4 <br /> \ <1.0 \ \ <br /> % SV-2 \ <br /> \ 3.2 � � <br /> IPA \ <br /> \ % <br /> Former Dispenser Islands �, *\B-2 �n � <br /> % <br /> V70%.\ <br /> MW-5 <br /> \ Fence MW-2� \% M -1 \ <br /> \ 3/14/2013 % <br /> 3/14/2013 <br /> Concrete Pad ✓�B ,<50 <br /> <50 <br /> \ , 160 <br /> 150 <br /> <1.0 <br /> 2.5 <br /> \ <0.5 <br /> <0.5 3/14/2013 5/19/2013 <br /> % <br /> \ <50 NA <br /> % 14,000' 270/<50-' \ <br /> 11 NA <br /> % 24 NA +\ <br /> % <br /> % <br /> \ /x <br /> /x <br /> % x/x <br /> x/ <br /> LEGEND: ABBREVIATIONS/NOTES: <br /> MW-1# Existing Monitoring Well x/ UST#1 =Former 12,000-gal Unleaded Gasoline UST <br /> B-1 a Approximate Soil Boring Location UST#2 =Former 6,000-gal Regular Gasoline UST <br /> UST#3 =Former 4,000-gal Diesel UST <br /> NS Not sampled due to legal access issues TPH-G =Total Petroleum Hydrocarbons as Gasoline <br /> TPH-D =Total Petroleum Hydrocarbons as Diesel <br /> <50 TPH-G Concentration in Micrograms per Liter(Ng/L) MTBE =Methyl Tert-Butyl Ether <br /> <50 TPH-D Concentration in pg/L 1,2-DCA =1,2-Dichloroethan <br /> =TPH-D result is suspected to be contaminated in the laboratory. <br /> 5.0 MTBE Concentration in pg/L =Split confirmation sample by Moore-Twining/Excelchem. <br /> 20 1,2-DCA MW-4 and MW-5 were installed on February 9 and 10,2012 <br /> Department of General Services Job Number 0300910016 <br /> Former Blue Star Gasoline Station Revision <br /> SCALE IN FEET 4040 East Main Street,Stockton,CA Date April 2013 <br /> NORTH GROUNDWATER ANALYTICAL DATA <br /> 0 30 Figure 4 <br /> MARCH 14, 2013 AND MAY 9, 2013 <br /> 3831 North Freeway BWo Suite 220 Sacraoamto Calilomia 95834 USA T 1 916 372 6606 F 1 916 372 6616 W ww.y.gho.com <br /> -1—121-13-3:1— Laa ire rb. O.]Wfi-G Medd Geiwrel5ven+O)o6P1GOr6 B+-a S,nnWGUFpure+W+}fn WONripve -E.,en,d Pe,m GwDp <br />