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Caltrans Construction <br /> iDivision <br /> x <br /> IOffice <br /> x Office <br /> I <br /> x <br /> ITrailer <br /> x TPHg=<50 <br /> TPHd=53 <br /> MW-12� B=<0.5 <br /> MTBE <br /> x <br /> �x-xx—xx—xx—xx--xx—x—x—x—x—x—x—x—x—x—x—;—x—x—xx— <br /> x Chain Link Fence <br /> TPHg=300 <br /> X TPHd= 110 <br /> B= 12 1 TPHg=500 MW-9 <br /> B= 17 <br /> O <br /> MTBE=5.4 TPH = 17 <br /> x� 8 <br /> MTBE=74 <br /> Storage Warehouse <br /> X m TPHg=<50 <br /> TPHd=<50 <br /> MW-8 O B=<0.5 <br /> MW-7 MTBE=<0.5 <br /> X TPHg=8,200 ;Concrete <br /> 17,000 <br /> t— TPHg= 190 570 <br /> LU <br /> MTBE= 1,9DO 4,200 <br /> 43" TPHg 1,700 <br /> TPHd E'7 TPHg-800 <br /> U) Driveway •SB-2 MTBE=320 TPHd= 170 <br /> B=4.8 <br /> MTBE= 16 <br /> °' ^ VW-1 UW 2 �MW-1 <br /> 1 SB-3 Former Pump Island <br /> = x O <br /> MW-11 s STOCKTON <br /> `r' *SB-1 <br /> � x MW-g Building OMW-6 YARD <br /> � <br /> TPHg= 1,900 TPHg=6,800 FACILITY <br /> TPHd= 160 xTPHd=560 <br /> Approximate Location <br /> B=370 of Under round B= 1,900 <br /> Fuel Tank Cavity <br /> MTBE= 13 g Former Pump Island MTBE=36 <br /> Concrete BMW-2 <br /> TPHg=d00 <br /> Driveway TPHd=200 <br /> B=8.6 <br /> MTBE=3.0 <br /> OMW-4 <br /> • OMW-5 <br /> LEGEND: x <br /> I 66 <br /> hTPHg=MW-4 through MW-12; GEOCON x TPHg-<50Groundwater Monitoring Wells TPHd= 110 Maintenance Facility <br /> x B=<0.5 <br /> 4F MW-1 through MW-3; Alton Geoscience I MTBE_<0.5 <br /> Groundwater Monitoring Wells, March 1992 <br /> x <br /> • SB-1 and SB-2; Alton Geoscience <br /> Soil Borings, March 1992 x oMW-10 <br /> ■ SB-3, GEOCON Soil Boring I • <br /> x <br /> VW-1 &VW-2; GEOCON Vapor Extraction Wells I ENVIRONMENTAL CONSULTANTS INCORPORATED <br /> TPHg=<50 3235 SUNRISE BLVD.-SUITE 6-RANCHO CORD0VA,CALIFORNIA 95742 <br /> x (015 <br /> TPHd=68 PHONE 916 852-9118-FAX 916 852-9132 <br /> TPHg = Total Petroleum Hydrocarbons as Gasoline B= 1.0 <br /> TPHd= Total Petroleum Hydrocarbons as Diesel I MTBE_<0.5 Caltrans Stockton Yard Maintenance Facility <br /> 8 = Benzene CONCENTRATIONS OF <br /> MTBE= Methyl tertbutyl ether 160+ South B Street PETROLUEM <br /> All Concentrations in Micrograms per Liter(ppb) <br /> 0 40 Stockton, California HYDROCARBONS <br /> • MTBE=14 when analyzed by EPA Test Method 8260 GEOCON Proj. No. S8100-06-11C IN GROUNDWATER- <br /> Approx.Approx.Scale in Feet <br /> Task Order No. 10-911175-12 December 1996 Figure 5 <br />