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TA& 1 � r>•r l■�r Irr lr r r r <br /> 4r <br /> SUMMARY OF GROUNDWATER ELEVATION AND ANALYTICAL DATA <br /> CALTRANS MAINTENANCE STATION <br /> STOCKTON, CALIFORNIA <br /> DEPTH TO GROUND- ETHYL- TOTAL <br /> WELL I.D. DATE TOC GROUND- WATER TPH-G TPH-D BENZENE TOLUENEETHYL- <br /> XYLENES MTBE VOCs <br /> ELEVATION ELEVATION (N911) (ligf1) (�tg11} (�Igll} (N911) (Vgft) �N911) 4[�9ft} <br /> MW-12 12/29/97 22 19 5740 -3521 <50 <5000 <0 5 060 _<0 5 1 1 <5 <5 <br /> MW-12 3116198 22 197 <br /> 53 81 -31 62 <50 70 v 091 200 _0 7 41 <5 ND <br /> MW 92 _ 6126198 2219 50 13 f-2793 X500 <5000 09 040 ---07-- <br /> 11 21 — (<5) -- — 214 <br /> TOC = Top of casing elevations <br /> MSL = Mean Sea Level <br /> TPHG =Total Petroleum Hydrocarbons as Gasoline by EPA Method 8015M <br /> TPHD =Total Petroleum Hydrocarbons as Diesel by EPA Method 8015M <br /> BTEX = Benzene, Toluene, Ethylbenzene, and Total Xylenes by EPA Method 8020 <br /> MTBE = Methyl Tertiary Butyl Ether by EPA Method 8020 <br /> < = Less than method detection limits <br /> ------ = Not measured, sampled tested, or present <br /> All measurements are presented in feet <br /> mgll = milligrams per liter <br /> pgll = micrograms per liter <br /> " = Laboratory report notation "the above samples do not appear to contain diesel" <br /> (<5) = MTBE concentration as calculated by EPA Method 8260 <br /> I <br />