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Table B-2 : Historical Groundwater Measurements and Analytical Results <br /> DEPTH TO GROUNDWATER <br /> SAMPLE DATE GROUNDWATER ELEVATION ETHYL. <br /> LOCATION SAMPLED (Feet los) (Fen mq) TPH-K TPH-MO TPH-D TPH-G BENZENE TOLUENE BENZENE NYLENES MTBE DIPE ETBE TAME TBA 12DCA EDB Naphthalene <br /> Withwell SOISM/ Sol 802IB/ 8021B/ 8021B/ <br /> eaging elevation EPA Method - 9015M 8015M BOISM 82606 8260E 8260E 8260B 82608 8260B 8260B 8260E 8260E 8260B 8260B 8260E 82608 <br /> (Feet msl) WOO - None None 100 µg/L 5 µg/L 10 µg/L 150 µg/L 300 µg/L 1,750 µg/L 13 µtil None None None 12 it 0.5 µg/L 0.05 gg/L 17 µg/L <br /> M W-10 09/08/32 31 .86 -11 01 <200 NA <300 91 < 0.50 < 0,50 0.50 1 .0 39 1330 0,50 0.50 10 < 050 0.50 <0.50 <br /> CPT-1-5}GW O'J09/1 B Sample collected at 53 feet thas W30 NA 1.9000 220 0.80 1 0. 19 1 0. 11 < 1 .0 a <br /> NA "pe <br /> NA 23 NA '- 0 <br /> CPT-I-Y/-GW 0:V09/l8 Sizable collected at 77 feetb <200 NA <200 J 15 0.50 1022 050 < 1 .0 A NA NA mo NA <050 <br /> CPT-2-SS-GW 02/o/I8 Sample collected at 55 fen b ' <200 NA ✓ 1200 J 9.1 0.50 1 0, 16 0.50 < 1 .0 A NA NA 3.8 NA I0 30 <br /> CITY WELL I'J28/01 NA NA NA 50 0.5 0.5 0.5 05 5 0.5 5 0.5 NA NA <br /> AS-1 06/06/Il 3863 NA NA NA 210,1100 46,0g0 780 6,300 22,000 NA NA NA NA NA NA <br /> 06/1]/11 3846 NA NA NA 16.000 7.900 49 130 700 A NA NA NA NA NA <br /> 03/11/13 36.44 NA NA NA IA00 550 < 5 < 5 < IO NA NA NA NA NA <br /> SVE-2B*** 0321/13 36, 15 NA NA NA 21,000 800 L4W 450 2A00 A NA NA NA NA NA1'✓09/13 3].32 NA <620 <1'_0 33.000430 NA NA < 10 NA 490SVE-26^^` OS/IS/IS 38. 10 NA GSW <100 NA NA NA NA NA NA NA 16 NA 350 <br /> NOTES. All measurements and data dated prior to June 2010 were provided by Ramage Environmental, Condor Earth Technologies. Inc. is not responsible for the accuracy and completeness of information collected a others.Wellhead elevations and locations survey by Morrow Surveying in Apo1 1999. December 2001. December 2003. and Apo 12005; Buis of elevations: City of Stockton Benchmark d113 (Elevation = 19.51 Feround surface; msl = mean sea level <br /> Analytical results are reported in micrograms per liter (ug/I) which insulates to parts per billion (ppb); < = Less than the indicated laboratory reporting limit; NA = Not analyzed for specified compound;,/ = Estimated value (Contract Laboratory Program Flag) <br /> Total Petroleum Hydrocarbons as Diesel (TPH-D), Kerosene (TPH-K), and Motor Oil (TPH-MO) analyzed by EPA Method 8015M: Total Petroleum Hydrocarbons as Gasoline (TPH-G), benzene, toluene, ethylbenzene, xylem by EPA Method 8260B or 8021 B/80I SM <br /> Additives Methyl-t-butyl ether (MTBE). Di-isopropyl ether (DIPE). Ethyl-t-butyl ether (ME), Ten-amyl methyl ether (TAME), Ten-Butanol (TBA), 1%Dichlorcethane (I2-DCA) and 1_-dibrome tth me (EDB) analyzed by EPA 8260B <br /> WOO = Water Quality Objective, generally equivalent to the drinking water Maximum Contaminant Level (MCL) unless specified otherwise: None = No established WOO: Results in bold indicate values that exceed the WQO. <br /> 1 = EPA Health Advisory level and Taste and Odor Threshold;' = Notification Level (adv arry only); s = result with EPA Method 8270C analysis; 4 = result with EPA Method 8260E analysis: EPA Method 8270C analytical result was 2.000 ug/L. <br /> * Sample chromatograph does not resemble fuel standard used for quantization, result is estimated: ** Result is elevated due to the presence of single acolyte p rak(s) in the quantitation range: `** Samples collected 3/2 U2013 & I V09/'-013 misidentified in the field. <br /> ° Chromatogram not typical of diesel, " Chromatogram not typical of kerosene. <br /> X\Project\.5000_prj\5960 SJC UST RFO\5960C County of San Joaquin - SJC Public Works\5960C12\596OC12A GW Monitoring0ata\5960C12 2022C3 Motor Pool Historical Dats.xlsxTable B-2 Histioncal Data 11 of 11 <br />