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1 <br /> Cattrans Construction <br /> i Division . <br /> Office <br /> ' Office <br /> x Trailer <br /> UB� <br /> ' <br /> TPHd <br /> MW-12 <br /> x <br /> x-max x x x x x�--x—x�--x x x x—x--�x—x--�x—x—�x—x--�x�--� <br /> x—x x x— <br /> x Chain Unk Fence <br /> TPHg= 100 <br /> ' x TPHd= 60 MW 9 <br /> LTPHg=400 MTBE= 0 6 _��= 70 <br /> x Storage Warehouse <br /> � TPHg= <50 <br /> XM TPHd= <50 <br /> U MWS O B= <05 <br /> Mw-7 MTBE= <05 <br /> ' x TPHg= 13 000 4TPHg0 000 <br /> TPHd=650 400 <br /> LU 6= 3500 000 <br /> w MTBE= 37 3 TPHg=51000 <br /> TPHd=2 600 TPxg=6008= 10 000rn Driveway 4DSB 2 MTBE=35 TPN8_=5 1VW 1 oncrete BMW-1 MTBE= 14 <br /> C33 VW 2 <br /> Former Pump Island <br /> SB-3 <br /> X ° <br /> 4.2 MW 11 STOCKTON <br /> MW 3BMW-6 YARD <br /> U x ®S61 Building <br /> TPHg= 17000 FACILITY <br /> TPHg= 15 000x 4 TPHd=410 <br /> TPHd=470 I 8= 1 600 <br /> B=2 700 I Former Pump Island MTBE=34 <br /> MTBE=36 Approximate Location <br /> of Underground Concrete BMW-2 <br /> Fuel Tank Cavity TPHg= 50 <br /> Driveway TPHd= F00 <br /> 8=35 <br /> MTBE= 17 5 <br /> X OMW 4 <br /> OMW 5 � <br /> LEGEND x <br /> • <br /> ITPHg= <50 <br /> ' O MW-4 through MW-1 2, GEOCaN x TPxd= <so <br /> B TPHg= <50 Maintenance Facility <br /> Groundwater Monitoring Wells =0TPHd=<50 <br /> MTBF= 055 B- <05 <br /> MW-1 through MW-3, Alton Geoscience x MTBE= <05 <br /> Groundwater Monitoring Wells, March 1992 <br /> • SB-1 and SB-2, Alton Geosaence x <br /> Soil Borings, March 1992 f Iry`IIUyl�1'n' <br /> x <br /> ' ■ 58-3,GEOCON Soil Baring � MW-10 <br /> (Not Sampled) <br /> ® x <br /> 1 &VW-2, GEOCONVaporExtractionWells I ENVIRONMENTAL CONSULTANTS INCORPORATE❑ <br /> VW- <br /> li � 3235 SUNRISE BLVD —SUITE 6—RANCHO CO HDOVA CALIFORNIA 95742 <br /> PHONE 816 852 81 18—FAX 916 852 9132 <br /> T-1 Former 10,000 Gallon Unleaded Gasoline UST x <br /> T-2 Former 5,000 Gallon Diesel Fuel UST I Maintenance Station Groundwater Monitoring Project <br /> Caltrans District 10 Stockton Yard Facility <br /> Stockton, California Maintenance Station <br /> TPHg = Total Petroleum Hydrocarbons as Gasoline 0 40 1 CONCENTRATIONS OF <br /> TPHd= Total Petroleum Hydrocarbons as DieselPETROLUEM HYDROCARBONS <br /> B = Benzene Approx Scale in Feet GEOCON Prot No S8100-06-62 IN GROUNDWATER <br /> MTBE= Methyl-cert-butyl-ether <br /> A!1 Concentrations in Micrograms per Liter(ppb) rTas�Orcler No 10-911175-A9 August 1Figure 3 <br /> 996 <br />