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14*s� <br /> ' GEOMATRIX <br /> TABLE 3 <br /> t GROUNDWATER ANALYTICAL RESULTS <br /> FOR MONITORING WELL SAMPLES' <br /> Surland Homes Property <br /> Tracy, California <br /> Results reported in micrograms per liter(µg/1) <br /> ' Sample Date Ethyl- <br /> ID Collected TPHgt TPHd' Benzene' Toluene° benzene° Xylenes' PAHss <br /> ' TW-1 9/14/98 <50 <50 <0.5 <0.5 <0.5 <0.5 ND6 <br /> 10/16/98 <50 <50 <0.5 <0.5 <0.5 <0.5 ND <br /> 7/29/99 <50 110/<50' <0.5 <0.5 <0.5 <0.5 <0.1 <br /> 10/14/99 <50 120/<50 <0.5 <0.5 1 <0.5 <0.5 1 <0.1 <br /> 1/14/00 <50 <50/<50 <0.5 <0.5 <0.5 <0.5 <0.1 <br /> 4/19/00 <50 61/<50 <0.5 <0.5 <0.5 <0.5 <0.1 <br /> ' TW-2 9/14/98' 1200 520' <0.5 <0.5 1.7 4.1 Acenaphthene 0.99 <br /> Fluorene 2.29 <br /> Phenanthrene 1.49 <br /> ' 10/16/98 NS10 NS NS NS NS NS NS <br /> 7/29/99 NS NS NS NS NS NS NS <br /> ' 10/14/99 NS NS NS NS NS NS NS <br /> TW-3 7/29/99 <50 100/<50 <0.5 <0.5 <0.5 <0.5 ND <br /> 10/14/99 <50 150/<50 <0.5 <0.5 <br /> ' 1/14/00 <50 <50/<50 <0.5 <0.5 <0.5 <0.5 <0.1 <br /> 4/19/00 <50 <50/<50 <0.5 <0.5 <0.5 <0.5 <0.1 <br /> ' Notes: <br /> Samples collected by Geomatrix Consultants,Inc. and analyzed by Friedman&Brays,Inc.of Seattle, <br /> Washington. <br /> Z TPHg=total petroleum hydrocarbons quantified as gasoline(C4-Clz)analyzed using EPA Method 8015M. <br /> ' TPHd=total petroleum hydrocarbons quantified as diesel(CIO-C24)analyzed using EPA Method 8015M,with a <br /> silica gel preparation procedure. <br /> ' 4 Benzene,toluene,ethylbenzene,and xylenes(BTEX)analyzed using EPA Method 802113 or 8260B. <br /> 5 PAHs=polynuclear aromatic hydrocarbons analyzed using EPA Method 8270 SIM or 8270C SIM. <br /> 6 ND=not detected at or above the laboratory reporting limit. <br /> TPHd result withouttwith silica gel preparation procedure,respectively. Concentration without silica gel <br /> preparation procedure represents polar compounds likely resulting from intrinsic bioremediation of residual <br /> petroleum at the site. <br /> ' Sheen observed on groundwater prior to sampling;sample included entrained sheen. Sample collected at the <br /> request of the San Joaquin County Public Health Services. <br /> 9 Sample filtered prior to extraction using a 0.7 micron glass fiber filter. <br /> IO NS=not sampled due to presence of sheen on groundwater. <br /> I:\Doc-Safe\6000s\6447.007\HRA\HRA Table 3.doc <br />