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GEOMA-MIX <br /> TABLE 4 <br /> PREVIOUS ASSESSMENT GRAB GROUNDWATER ANALYTICAL DATAI <br /> UST Site No 3 - Port of Stockton <br /> Stockton, California <br /> BTEX' <br />' Sam le Number Date TPHgz B T E X <br /> B3-4 @ 20 feet 12/20/01 <504 <0 5 <0 5 <05 <0 5 <br /> B34 @AO feet I2/20/01 <50 <05 <0 5 <05 <0 5 <br /> B3-5 @ 20 feet 12/20/01 610,000 19,000 21,000 12,000 39,000 <br /> B3-5 @ 40 feet 12/20/01 220 10 21 26 84 <br /> B3-6 @ 20 feet 12/21/01 6,900 2,200 26 62 58 <br /> B3.6 P,40 feet 12/21/01 <50 <0 5 <0 5 <0 5 <05 <br /> 133-7 @ 20 feet 12/21/01 <50 <0 5 <0 5 <0 5 <0 5 <br /> 133-7 @ 40 feet 12/21/01 <50 <0 5 <0 5 <0 5 <0 5 <br /> B3-8 @ 20 feet 02/27/02 <50 <0 5 <0 5 <0 5 <0 5 <br /> B3-9 @ 20 feet 02/27/02 <50 <0 5 <0 5 <0 5 <0 5 <br /> B3-9 @ 40 feet 02/27/02 <50 <0 5 <0 5 <0 5 <0 5 <br /> B3-10 @ 20 feet 02/27/02 <50 <0 5 <0 5 <0 5 <0 5 <br /> 133-11 @ 20 feet 02/28/02 <50 <0 5 <0 5 <05 <0 5 <br /> 133-11 @ 40 feet 02/28/02 <50 <05 <0 5 <0 5 <0 5 <br /> 133-12 @ 20 feet 02/28/02 <50 <0 5 <0 5 <0 5 <0 5 <br /> B3-13 @ 20 feet 02/28/02 <50 <0 5 <0 5 <0 5 <0 5 <br /> 133-13 40 feet 02/28/02 <50 <0 5 <0 5 <0 5 <0 5 <br /> B3-14 @ 40 feet' 01/28/03 <20 <0 5 <0 5 <0 5 <0 5 <br /> 1 Groundwater analytical data for soil bonngs from previous assessments <br /> Geomatrix Consultants,Inc,2002,Results of Assessment and Recommendations for Well Placement,UST Site No 3 <br /> (Site Code 1282-124),prepared for the Port of Stockton <br /> Geomatrix Consultants, Inc,2002,Results of Assessment and Recommendations for Further Assessment Lateral and <br /> Vertical Extent of Petroleum Hydrocarbons in Soil and Groundwater,Site No 3(Site Code 1282-124),prepared for <br /> the Port of Stockton <br /> Geomatrix Consultants,Inc,2003,Results of Additional Assessment and Remediation Evaluation of Petroleum <br /> Hydrocarbons in Groundwater,UST Site No 3(Site Code 1282-124),prepared for the Port of Stockton <br /> 2 TPHg=total petroleum hydrocarbons quantified as gasoline analyzed using U S Environmental Protection Agency <br /> (EPA)methods 8015M or 8260B Results reported to micrograms per liter(pg/L) <br /> 3 B=benzene,T=toluene,E=ethyl benzene,X=total xylenes(sum of m,p-xylene and o-xylene), <br />' using EPA methods 8020 or 8260E Results reported in ag/L <br /> 4 <=Analyte not detected at concentration greater than the reporting limit shown <br /> 5 Sample 133-14 at 40 feet had a dusopropyl ether detection of 0 88 ttg/L,with a practical quantitation limit of 0 5µg/L <br /> 1 <br /> • <br /> 1 16000s16437 0001Archive16437-028 <br />