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y <br /> Table 1 <br /> GROUND WATER ELEVATIONS AND SAMPLE ANALYTICAL RESULTS <br /> Ruiz Grocery Store <br /> y 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) (Ppb) (Ppb) (Ppb) (Ppb) (ppb) (Ppb) <br /> RW-1 10/19/95 --- 15.05 --- 0.00 18,000 2,000 1,500 370 1,500 1,400 <br /> 12/19/95 --- 16.46 - --- --- --- --- --- --- --- ., <br /> 12/20/95" --- ---. --- 0.00 220 12 2.3 ND<0.5 23 410 <br /> 1/5/96 {+ --- 16.79 --- --- --- --- --- --- --- --- <br /> 7/2/96 --- 15.30 --- -- --- --- --- --- --- --- <br /> Domestic 9/4/91 --- --- --- 0.00 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 -- qC <br /> - <br /> Well 1/7/93 --- --- --- 0.00 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- <br /> 4/7/93 -=- -- --= 0.00 ND<50 ND<0.5 ND<0.5 ND<0.5 j ND<0.5 <br /> 1/5/96® --- --- --- 0.00 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5.0 <br /> 7/2/96 --- --- --- 0.00 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5.0 <br /> HP-1 10/20/93 --- --- --- 0.00 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 --- <br /> HP-2 10/20/93 --- --- --- 0.00 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 - <br /> HP-3 10/20/93 --- L--- --- 0.00 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 --- <br /> HP-4 10/20/93 --- --- 0.00 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 --- <br /> --- <br /> HP-5 10/20/93 --- --- --- 0.00 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 --- <br /> HP-6 10/20/93 --- --- 0.00 ND<50 ND<0.3 ND<0.3 ND<0.3 ND<0.3 --- <br /> Notes; <br /> --No es <br /> TOC Top of casing referenced to mean sea level <br /> DTW Depth to water <br /> GWF 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 tertiary butyl ether by EPA Method 8020 <br /> ND<50 Not detected in concentrations exceeding the indicated method detection limit <br /> --- Not tested/measured <br /> ppb Parts per billion <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 /> Q Samples unpreserved and 7 day holding period exceeded,samples analyzed 13 days after collection <br /> Page 3 of 3 <br />