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Table A-Summary of Degradation Rate Calculations <br /> Shell Stockton Terminal,3515 Navy Drive,Stockton,California <br /> Maabnom Coment <br /> Concmtratlon Concentration Half-Life Date to Reach Years to reach <br /> Well Analyte (py/L) (pg/L) (years) WQO WQO <br /> MW-1 TPHd 56,000.00 1,200 3.21 Apr-19 7 <br /> TPHg 1,300,000 10,000 205 Aug 2022 10 <br /> Benzene 99,000 1,300 2.49 Sep 2023 12 <br /> MTBE 160,000 14,000 217 Dec 2024 13 <br /> TBA 170,000 12,000 246 Oct 2007 WQOmet <br /> MW-2 TPHd 790 180 8.44 Jul-03 WQO met <br /> TPHg 620 93 6.79 Oct 2001 WQOmet <br /> Benzene 61 <0.5 NA Below WQO WQO met <br /> MIRE 540 9 NA Below WQO WQO met <br /> TBA Not enough recent data to graph <br /> MW-3 TPHd 1,900 570 6.76 Sep-20 9 <br /> TPHg 260 260 Stable trend Stable vend Stable trend <br /> Beoueae 18 20 NA Below WQO 0 <br /> MTBE 22 1.6 NA Below WQO WQO met <br /> TBA He <10 NA Below WQO WQO met <br /> MW-0 TFHd 200 50 NA Below WQO WQO met <br /> TPHg 260 <50 NA Below WQO WQO met <br /> Benzene 13 <3 NA Below WQO WQO met <br /> MTBE 74 14 NA Below WQO WQOmet <br /> TBA Not enough recent data to graph <br /> MW-8 TPHd 91900 3,100 10.84 Nov-52 41 <br /> TPHg 11,000 3,300 39.54 Dec 2164 - 153 <br /> Benzene 5,600 73 282 Jan 2010 0 <br /> MTBE 99 <1.0 NA Below WQO WQO met <br /> TBA 290 9.6 NA Below WQO WQO met <br /> MW-9 TPHd 430 50.00 1.67 Apr-07 -5 <br /> TPHg 260 <50 NA Below WQO WQO met <br /> Benzene 20 <0.5 NA Below WQO WQO met <br /> MTBE 34 26 NA Only two detections above WQO <br /> TBA Not enough recent data to graph <br /> MW-10 TPHd 270,000 17,500 10.73 Jul-63 51 <br /> TPHg 170,000 20,000 Stable bend Stable bend Stable trend <br /> Benzene 20,000 9,190 Stable bend Stable tend Stable pend <br /> MTBE 7,000 1,470 288 Apr 2010 WQO met <br /> TBA 14,000 <10 Stable trend Stable trend Stable tend <br /> MW-11 TPHd 220,000 1,300 4.54 Mar-23 11 <br /> TPHg 42,000 1,600 7.91 Jan 2029 17 <br /> Benzene 3,230 48 3.17 Sep 2009 0 <br /> MTBE 1,300 100 NA Below WQO WQO met <br /> TBA 700 110 NA Below WQO WOO met <br /> MW-12 TPHd 5,100 750 5.08 Dec-21 10 <br /> TPHg 2,100 860 19.03 Feb 2040 28 <br /> Benzene 270 100 218 Below WQO 0 <br /> MTBE 86 8.0 NA Below WQO WQO met <br /> TBA 85 <10 NA Below WQD WQO met <br /> MW-13R TPHd 91900 2,750 7.57 Apr-31 19 <br /> TPHg 750,000 2.900 6.80 Mar 2034 22 <br /> Bszeae 5,000 136 4.35 Apr 2019 7 <br /> MTBE 59 <03 NA Below WQO WQO met <br /> TBA 480 <10 NA Below WQO WQO met <br /> MW-14 TPHd 5,000 1,300 5.67 Oct-21 10 <br /> TPHg 3,200 190 10.53 May 2018 6 <br /> Benzene 140 1.7 39.48 Below WQO WQO met <br /> MTBE 28 <1.0 NA Below WQO WQO met <br /> TBA 31 <10 NA Below WQO WQO met <br />