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Table 4 Summan./of Metals,Chlorinatlerbicides,Volatile Organics,TPH,and • <br /> Inorganic Compound Concentrations in Reconnaissance Ground Water Samples <br /> ,--1 Samples Collected on 12 Januanj 2005 <br /> JJ Lesco Inc <br /> Stockton,California <br /> Region IX Tap Water Maximum SB-4 SB-5 SB-6 SB-7 <br /> Preliminary Remediation Contaminant <br /> Volatile Organic Compounds(continued) Goals mg/L) Goals(mg/L) <br /> Dibromochloromethane 0.13 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,2-Dibromoethane 0.0056 NE < 2.0 < 2.0 < 2.0 < 2.0 <br /> Chlorobenzene 110 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,1,1,2-Tetrachloroethane 0.43 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> Ethylbenzene 1300 700 < 1.0 < 1.0 < 1.0 < 1.0 <br /> m-Xylene&p-Xylene 210 1,750 < 1.0 < 1.0 < 1.0 < 1.0 <br /> /7 o-Xylene 210 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> Styrene 1600 100 < 1.0 < 1.0 < 1.0 < 1.0 <br /> Bromoforur 8.5 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> Isopropylbenzene NE NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> bronwbenzene 20 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,1,2,2-Tetrachloroethane 0.055 1.0 < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,Z3.Trichlocpropme 0.0056 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> n-Propylbenzene 240 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 2-Chlorotoluene NE NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> �7 4-Chlormoluene NE NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> )J)J 1,3,5-Trimethylbenzene 12 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> cert-Butylbenzene 240 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,2,4-Trimethylbenzene 12 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> sec-Butylbenzene 240 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,3-Dichlorobenzene 180 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> p-Isopropyltoluene 5 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,4-Dichlombenzene 0.5 5.0 < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,2-Dichlorobenzene 370 600 < 1.0 < 1.0 < 1.0 -;7 1.0 <br /> n-Butylbenzene 240 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,2-Dibromo-3chlorpropane 0.048 NE < 2.0 < 2.0 < 2.0 < 2.0 <br /> 1,2,4-Trichlorobenzene 7.2 5.0 < 1.0 < 1.0 < 1.0 < 1.0 <br /> HexacHorobutadiene 0.86 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> Naphthalene 6.2 NE < 1.0 < 1.0 < 1.0 < 1.0 <br /> 1,2,3-Trichlorobenzene NE NE < 1.0 < 1.0 t < 1.0 < 1.0 <br /> cis-1,2-Dicldoroethene 61 6.0 < 1.0 < 1.0 < 1.0 < 1.0 <br /> Purgeable Total Petroleum Hydrocarbons ft/L) <br /> Gasoline NE NE < 50 < 50 < 50 < 50 <br /> ■1 Unknown NE NE < 50 < 50 < 50 < 50 <br /> ■■,JI Extractable Total Petroleum Hydrocarbons(pg/[.) <br /> Diesel NE NE NS < 50 < 50 NS <br /> Unknown NE NE NS < 50 < 50 NS <br /> Inorganic Analysis(mg1Q <br /> Clilonde NE 250 98.1 Q 108 0 1,520 Q 73.3 Q <br /> Perchlorate 0.0036 0.006# < 200 < 1010 1,000 -< 200 <br /> Nitrate as N NE 10 157.:Q 43.5 Q_.. 310 Q :47A Q <br /> Sulfate NE 250 327 Q 1,060 Q 6,280 Q I,63Q..l2 <br /> ..... <br /> Nitrogen,Ammonia NE DIH 441 Q is.- Q 3,730 Q 4.7 Q <br /> pH Suggested Level is 6.5 to 8.5 5,6 6 1 6.8 r,'t <br /> Notes: <br /> Q=Elevated reporting limit. The reporting limit is elevated due to high analyte levels. <br /> J=Estimated Value <br /> ne=Not Established <br /> NS= Not sampled due to low ground water recovery. <br /> pg/L=micrograms per liter. <br /> mg/L=milligrams per liter. <br /> <=Less than labarory reporting limit <br /> RLA=The reporting limit for this analyte is elevated due to sample dilution. <br /> `California Modified PRG <br /> ■ #=Public Health Goal <br /> !■J (1)=Action Level <br /> t <br /> t <br /> '� <br /> ERM Page 2 of 2 Lesco-002431 <br />