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'all <br /> VAPOR EXTRACTION SYSTEM OPERATION <br /> "a 7-ELEVEN STORE <br /> l = 9110 THORNTON AVE. <br /> STOCKTON, CA <br /> �a <br /> Table 5. <br /> l INITIAL SKC CHARCOAL TUBE,ANALYSES OF VAPOR EXTRACTION WELLS <br /> j Well TPH as Gas Benzene Toluene Ethyl Benzene Total Xylenes <br /> I� <br /> mg/m3 mg/m3 mg/m3 m9/m3 mg/m3 <br /> RW-1 220 <0.9 9.0 <0.9 1.5 <br /> MW-1 4,800 21 14 130 590 <br /> MW-3 1,500 3.5 68 10 31 <br /> MW-4 120 <0.9 3.2 <0.9 <br /> VP-1 1 6 <br /> 10 <0.9 <0.9 <0.9 1.9 <br /> VP-2 340 1.2 18 2.7 13 <br /> VP-3 <10 <0.9 <0.9 <0.9 <0.9 <br /> ° VP-4 10 <0.9 <0.9 <0.9 <0.9 <br /> All vapor samples were obtained using SKC carbon tubes and SKC sampling p g pumps. 10 liter vapor <br /> samples were obtained on large SKC tubes at a sampling rate of 1 liter/minute from the positive <br /> pressure side of the blower. Laboratory analysis of the SKC tubes is by NIOSH Method 1500 for total <br /> hydrocarbons&aromatic volatile organics. Samples were analyzed at Superior Analytical Laboratories, <br /> -._ Martinez, CA. <br /> ti <br /> 13 <br /> ; s <br /> VAPOR EXTRACTION TECHNOLOGY. INC. <br />