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r wM mmm <br /> Table 4 <br /> INTEGRATED SURFACE WALK VOLATILE ORGANIC COMPOUND AND METHANE DATA <br /> Volatile Organic Compoundl (VOC) Concentration OVA Reading <br /> Sample Sample (ppb)2 As Methane <br /> Number Date VC BENZ EDS DCA MECL PCE CCL4 TCA TCE CHCL3 (ppm) <br /> SW-1 05/25/88 NO3 0.4 ND NO 6.9 0.2 ND 52 ND ND 4.4 <br /> Regulatory <br /> Detection Limits 2 2 0.5 0.2 1 0.2 0.2 0.5 0.6 0.8 NA4 <br /> Laboratory <br /> Detection Limit 0.2 0.09 0.06 0.1 1 .0 0.04 0.07 0.08 0.09 0.09 NA <br /> 1. VC - vinyl chloride PCE - tetrachloroethylene <br /> BENZ - benzene CCL4 - carbon tetrachloride <br /> EDB - ethylene dibromide TCA - 1,1, 1-trichloroethane <br /> DCA - 1,2-dichloroethane TCE - trichloroethylene <br /> MECL - methylene chloride CHCL3 - chloroform <br /> 2. ppb - parts per billion <br /> 3. ND - not detected <br /> 4. NA - not applicable <br /> PJ9 9390304.00D 2-8 Rev. 0 08/29/88 <br />