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M M M M M M M M M M M M mar <br /> Project No S8100-06-62 <br /> November 27 1996 <br /> Page 4 of 4 <br /> TABLE 1 <br /> CUMULATIVE SUMMARY OF GROUNDWATER MONITORING DATA AND ANALYTICAL RESULTS <br /> CALTRANS STOCKTON YARD MAINTENANCE FACILITY <br /> STOCKTON CALIFORNIA <br /> Notes µg/l=Micrograms per liter AG=Alton Geosciences <br /> TOC=Top of casing elevation surveyed with respect to Mean Sea Level(MSL) EA=Environmental Assessors,Inc <br /> TPHg—Total petroleum hydrocarbon as gasoline N&M=Nmyo&Moore <br /> TPHd=Total petroleum hydrocarbon as diesel *=Laboratory report notation"the above samples do not appear to contain diesel' <br /> BTEX—Benzene toluene ethylbenzene and total xylenes **=MTBE=14µg11 when analyzed by EPA Test Method 8260 <br /> MTBE=Methyl tert butyl ether — =Not tested <br /> MSL—Mean Sea Level <br /> Groundwater elevations for 04/06/92 were recalculated using the Caltrans survey performed on 10/27/93 <br />