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E
<br /> 1 Table 3
<br /> Historical Groundwater Analytical Results
<br /> r i Former Unocal Station No 5098
<br /> I s 4 5400 and 5606 Pacific Avenue, Stockton
<br /> t I
<br /> NOTES
<br /> Only compounds which were detected are shown on this table F
<br /> (1 )Samples taken on 12-19-95 were analyzed outside of their holding time r
<br /> 12-06-94 1,2-Dichloropropane was detected in weliiMW-1 ('5 3 pg/L) "
<br /> 02-08-95 1,2-Dichlo�opropane was detected in well MW-1 (1 3 tig/L) t ,
<br /> 06-21-95 1,2-Dichloropropane was detected in we1is MW-1`,}(1 6 ib g/L)and MW-4 (1 3,pg/L), Methylene chloride was detected in wells MW-3,(4 8 pg/L)
<br /> and MW-41(2 4 pg/L)
<br /> 03-11-96 Chloroform was detected in wells MW-1 (3 7 pg/L), MW-5 (3 0 pg1L), and MW-6(1 3 pg/L) f`
<br /> 06-19-96 1,2-Dichloropropane was detected in well MW-1 (,1 2 pglL) ; r
<br /> 12-05-96 Chloroform was detected in well MW-1 (2 6 pglL)J;
<br /> 12-10-97 Chloroform was detected in wells MW-1 (1 6 pg/L)and�MW-5 (1 2 pg/L) , t
<br /> 09-16-98 1,2-Dichloro6ropanewas detected m wells MW-1 '(1 2 pg/L)and VEW-5(34 pg/L) -
<br /> 09-16-98 p4sopropyltoluene was detected in wells MW-1 (1 5 pg1L), VEW-4 (8 4 pg1L), and VIEW-5(6 2 pg/L)
<br /> 09-16-99 p-Isopropyltoluene was detected in well MW-2 (1 1 pg/L) 3 I ,-
<br /> 09/19/00 Tetrachloroethene was detected in well MW-18 (114 pglL), p-isopropyltoluene was`detected In well MW-19D (1 1 pg/L), ' <
<br /> Several wells contained methylene chloride, a laboratory contaminant F u
<br /> 12/13/00 Methylene'chlande, a laboratory contaminant, wa's detected"jn well MW-13(25 0 pdfl, Several wells contained�chloroform in low °
<br /> concentrations,The chloroform is believed to be)denved from the tap water used to decontaminate the pump and hose system
<br /> 09/25/01 Tetrachloroettiene was detected in wells MW-27 (4 1 pg/L)and IOW-18 (1 6 pg )IL
<br /> p-Isopropyltoluene was detected in well MW-8D @ 45' (25 pg/kg)
<br /> 09/22/02 Tertiary Butyl'Alcohol was detected in wells MW-3 (70 pglL),jMW4 (19 pg/L), MW-14A(5 6 pg1L), MW-25S (37 pg/L), and MW-25D (38 pg/L)
<br /> Chloroform was detected m well MW-VA
<br /> (3 0 pg/L)acid Tetrachloroethene was dettected in wells MW-18 (0 85 uglL), MW-21S (0 58 pg1L), ,
<br /> and MW-27 (2 3 pg/L)
<br /> 12/03/02 p-Isopropyltoluene (19pg/L)and Styrene (1 5 pglL)were detected in well MW-11 h,
<br /> Venal chlonde was detected in well MWE 17 (2 6 gglLj, Tetrachlora82 ethene was detected in wells MW-18 (0 92 pg/L), MW-23D (0 pg/L), "
<br /> Trichloroethene was detected in well MW-27 (1'8 Pg/L) `
<br /> < = Not deteeted'af or above concentration limit listed I '
<br /> NA = Not Analyzed
<br /> w P I II `I i i t
<br /> 1,2,4-TMB = 1,2,4-Trihiethylbenzenb ! j; N- IB = n-Propylbenzene
<br /> 1,2-DCA = 1,2-Drchloroethane Is NA = Not Analyzed/Not Accessible i
<br /> 1,3,5-TMB = 1,3,5-Trirnethylbenzene �' NAPHT = Naphthalene tl
<br /> DTW = Depth tollWater I ND = Not Detected
<br /> f,
<br /> EB = Ethylbenzene I NS = Not Sampled 'j E
<br /> IPB = Isopropylbenzene i' sec-BB = sec-Butylbenzene
<br /> MTBE = Methyl Tertiary Butyl Ether° iTPHP = Total Petroleum Hydrocarbons as Gasoline '
<br /> N-BUTYL = n-Butylbenzene E N 12!32 ANALYTICAL-DATA I
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