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Table 2 I GROUND WATER ELVATIONS AND SAMPLE ANALYTICAL RESULTS Ruiz Grocery Store 4491 West Durham Ferry Road Tracy,California Sample Collection TOC DTW GWE SPH TPHg B T E X MTBE No Date (feet) (feet) (feet) (feet) (µg/L) {RWL) (1p1L) (µg(L) (pg/L) Qig/L) RW-1 10/19/95 --- 1505 --- 000 18,000 2,000 1,500 370 1,500 1,400 12/19/95 --- 1646 --- -- -- --- --- --- --- --- 12/20/95 (3) _-- --- --- 000 220 12 23 <0 5 23 410 1/5/96(l) 1679 7/2196 --- 1530 --- --- --- --- I --- 10/18/96 --- 15 31 --- --- --- -- --- --- --- --- I8120/98 9907 --- --- --- --- --- --- --- --- Domestic 9/4191 --- -- --- 000 <50 <0 5 <0 5 <0 5 <0 5 --- Well 1/7193 --_ --- 000 X50 <0 5 <0 5 <0 5 <0 5 --- 417/93 000 <50 <0 5 <0 5 <0 5 <0 5 1/5/1996(1) 000 <50 <0 5 <0 5 <0 5 <0 5 <5 0 7/2196 --- --- --- 000 <50 <0 5 <0 5 <0 5 <0 5 <5 0 ' 10/18/96 _ __ -- 000 <50 <05 <05 <05 <20 <50 1122197 000 <50 <0 5 <0 5 <0 5 <2 0 <5 0 4/22197 --- --- --- 000 <50 <0 5 <0 5 <0 5 <2 0 <5 0 7124/97 --- --- --- 000 <50 <0 5 <0 5 <0 5 <2 0 <5 0 11/14/97 »- --- N- 000 <50 C 12 10 07 <2 0 <5 0 1122198 000 <100 <0 5 <0 5 <0 5 <1 5 <5 0 5112/98 --- -- -- 000 <50 <0 5 <0 5 <0 5 <0 5 <5 0(5) $/20/98 —_ _-- =-- 000 <50 <0 5 <0 5 <0 5 <0 5 <5 0(5) 11/4198 000 <50 <0 5 <0 5 <0 5 <0 5 <5 0(5) 3/3/99 000 <50 <05 <0 5 <0 5 (15" <5 0 I 17113-1 10/20/93 --- __ -- 000 <50 <0 3 <0 3 <0 3 <0 3 --- HP-2 10/20/93 000 <50 <0 3 <0 3 <0 3 <0 3 HP-3 10/20/93 --- --- --- 000 <50 <0 3 <0 3 <0 3 <0 3 --- HP-4 10/20/93 „_ ~= 000 <10 <0 3 <0 3 <0 3 <0 3 --- HP-5 10/20/93 000 <50 <0 3 <0 3 <0 3 <0 3 HP-6 10/20/93 000 <50 <0 3 <0 3 <0 3 <0 3 Notes Top of casing referenced to mean sea level TOC Depth to water DTW Ground water elevation(corrected for presence of SPH,if applicable) GWE Separate-phase hydrocarbons SPH Total petroleum hydrocarbons as gasoline by EPA Method 8015(CA LUFT modified) TPHg Benzene,toluene,ethylbenzene and total xylenes by EPA Method 8020(CA LUFT modified) BTEX Methyl tertiary butyl ether by EPA Method 8020 through 1/22/98,EPA Method 8260 thereafter MTBE Not detected in concentrations exceeding the indicated method detection limit <50 Not tested/measured Micrograms per liter Ltg/L Samples unpreserved and 7 day holding period exceeded,samples analyzed 13 days after collection (1)�- MTBE by EPA Method 8260= 1,300 pg/L (2)--- Water sample collected from RW-1 after approximately 18 hours of pumping at 5 gpm (3)_ In addition to MTBE,39 pg/L of tert-Butanol was detected by Method 8260 (4) All other fuel oxygenates were not present in concentrations exceeding method detection limits the sample (5) Additional fuel oxygenates(ETRE,TBA,DIPE,TAME)were not detected in concentrations exceeding method detection limits by EPA Method 8240 or 8260 Page 4 of 4