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Table 1 <br /> GROUND WATER ELEVATIONS AND SAMPLE ANALYTICAL RESULTS <br /> Ruiz Grocery Store , <br /> 4491 West Durham Ferry Road <br /> Tracy,California <br /> Sample Collection TOC DTW GWE SPH TPHg B T E X MTBE <br /> No Date (feet) (feet) (feet) (feet) ( L) (EPA) (11A) ( L) ( ) ( L) <br /> HP-1 10/20/93 --- --- --- 000 <50 <0 3 <0 3 <03 <0 3 --- <br /> HP-2 10/20/93 --- --- --- 000 <50 <0 3 <0 3 <03 <0 3 <br /> HP-3 10/20/93 --- --- --- 000 <50 <0 3 <0 3 <03 <0 3 --- <br /> HP-4 10/20/93 --- --- --- 000 <50 <0 3 <0 3 <03 <0 3 --- <br /> HP-5 10/20/93 --- -- --- 000 <50 <0 3 <0 3 <0 3 <0 3 - <br /> HP-6 10/20/93 --- --- --- 000 <50 <0 3 <0 3 <03 <03 --- <br /> Notes <br /> s <br /> TOC Top of casing referenced to mean sea level <br /> DTW Depth to water <br /> GWE Ground water elevation <br /> SPH Separate-phase hydrocarbons <br /> TPHg Total petroleum hydrocarbons as gasoline by EPA Method 8015(CA LUFT modified) <br /> BTEX Benzene,toluene,ethylbenzene and total xylenes by EPA Method 8020(CA LUFT modified) <br /> MTBE Methyl terhary butyl ether by EPA Method 8020 <br /> <50 Not detected in concentrations exceeding the indicated method detection limit <br /> --- Not tested/measured <br /> µg/L Micrograms per liter <br /> * Corrected for presence of separate-phase hydrocarbons <br /> ** Water sample collected from RW-1 after approximately 18 hours of pumping at 5 gpm <br /> # Emulsified SPH observed <br /> @ Samples unpreserved and 7 day holding period exceeded,samples analyzed 13 days after collection <br /> * MTBE by EPA Method 8260=1,300 gg/L <br /> I <br /> Page 4 of 4 <br />