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' (BTEX)compounds were not detected in the samples collected from MW-4,MW-5,MW-7,MW-9,nor the <br /> . equipment blank water sample <br /> Table 3-2 <br />' Organic Analytical Results <br /> San Joaquin County Human Services Agency <br /> December 2402 <br /> 1 <br /> Well Groundwater Benzene Toluene Ethylbenzene Total TPH-G <br />' Elevation(feet) (,ug/L) Gg/L) 014L) Xylene (µgll-) <br /> (ug/L) <br /> MW-2 NM 11,000 ND000) 550 ND(100) 25,000 <br /> MW-2D NM 11,000 ND(20o) 760 ND(200) 28,000 <br /> (duplicate of <br /> Mw-2) <br /> MW-2A -1858 45 ND(50) 67 ND(50) 1,300 <br /> MW-3A -1862 NDc050> ND(O50) ND(050) ND(o 50) 120 <br /> MW-4 -1790 ND(O 50) NDco sod NDco so> NDco 50> ND(s o) <br /> MW-5 -1645 ND(0 50) ND{o sol NDco so> ND(o 50) ND(s o) <br /> MW-6 -1726 080 ND(()sod NDco so> ND(o 50) 140 <br /> MW-7 -1901 ND{050 NDco sod NDco 50) ND co so> NDcs o> <br /> MW-9 -1861 ND(o 50) ND(0 50) NDco so> ND(o 50) ND(s o) <br /> EB-1 I NA ND 0 ND I ND ND ND <br />' Notes NA Non applicable <br /> ND (0 5) Analyte not detected, detection limit indicated in parentheses <br /> NM Not measured <br /> NS Not sampled during this quarter <br /> (µg/L) Micrograms per liter <br />' 4.0 CONCLUSIONS <br />' Since the last sampling events (June 2002 and September 2002), concentrations of total petroleum <br /> hydrocarbons increased in source area well MW-2 and slightly decreased in MW-2A Petroleum <br /> hydrocarbons remained stable to MW-3A Benzene concentrations decreased in MW-2 and MW-2A <br /> Ethylbenzene concentrations increased to MW-2 and decreased in MW-2A Ethylbenzene concentrations <br /> significantly decreased in MW-2A, however MW-2 showed an increase in concentrations Toluene and <br /> 1 <br /> L\PR0JECPSISANJ0QIHSffi2Q04RPi WPD 5 <br /> 1 <br />