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TABLE 4 <br /> ANALYTICAL RESULTS OF AIR SAMPLES <br /> PPM (v/v) <br /> Sample PID TPH as Ethyl- <br /> ID measurement Gasoline Benzene Toluene benzene Xylene <br /> Air CCAS 5 760 310 0 . 560 5. 300 4 . 200 44 . 000 <br /> GB/4-28-92 470 208 0. 228 0.838 1. 120 6. 460 <br />� ppm (v/v) = parts per million by volume <br /> i <br /> 6 <br />