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M VMS- <br /> Project No 58100-06-62 <br /> November 27 1996 <br /> Page 4 of 4 <br /> TABLE 1 <br /> SUMMARY OF GROUNDWATER El EVATION AND ANALYTICAL DATA <br /> CALTRANS SHOP 10 <br /> 1603 SOUTH B STREET STOCKTON CA <br /> TQC Depth to Groundwater' Ethyl- Total <br /> Well Elevation Groundwater Elevation TPHg TPHd Benzene Toluene benzene Xylenes MTBE Sampled by <br /> Number Date (MSL) (feet) (MSL) (µgfl) (µ21l) (µg/1) (12J1) (µg/1) (µg11) {µ21l) <br /> VW-1 04/24/96 2209 6081 -38 72 13,000 <50* 2,300 1200 330 1,200 96 GEOCON <br /> VW-1 07/03/96 2209 5973 -3764 4,100 380 390 360 100 400 46 GEOCON <br /> VW-1 10/24/96 2209 6019 -3810 4,300 130 470 350 710 400 34** GEOCON <br /> MW-25 10/23/96 2195 5990 -3795 60 <)0 26 5 0 10 61 <0 5 GEOCON <br /> MW-26 10/24/96 2121 5958 -3837 100 <50 3 8 <0 5 <0 5 <0 5 5 1 GEOCON <br /> MW-26dup 10/24/96 2121 --- --- 100 <50 3 7 <0 5 <0 5 <0 5 59 GEOCON <br /> Notes <br /> 'All groundwater elevation data prior to April,1992 was referenced from an arbitrary onsite evaluation of 100 feet WCC=Woodward Clyde Consultants <br /> 'TOC elevations for-,A ells MW-9 through MW 26 resurveyed with respect to Caltrans Monument 1(21 57 feet MSL) ALTON=Alton Geosctence <br /> TOC=Top of casing £A=Environmental Assessors <br /> TPHg=Total petroleum hydrocarbons as gasoline NM=Nmyo and Moore <br /> TPHd=Total petroleum hydrocarbons as diesel <br /> MTBE=Meth)1 tert-butyl ether <br /> MSL=Mean sea level <br /> µg11=Micrograms per liter(ppb) <br /> <=Below detection limit for analytical methods used <br /> =Data not available or not applicable or not sampled <br /> *=Hydrocarbons lighter than diesel present,partially biodegraded gasoline <br /> **=Nondetected concentration of MTBEµhen analyzed by EPA Test Method 8260 <br />