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i <br /> Mr. Allen <br /> January 16, 1990 <br /> Page 2 <br /> presence of benzene, toluene, ethylbenzene, and xylenes (BTEX) , <br /> and for total petroleum hydrocarbons (TPH) . Due to a temporary <br /> I <br /> shutdown of the groundwater-extraction treatment system, the air- <br /> stripper effluent was not analyzed1for priority pollutant metals. <br /> TABLE 1 <br /> 1 <br /> AIR STRIPPER EFFLUENT DISCHARGE <br /> WATER QUALITY DATA <br /> Concentration <br /> Component 12/01/89 12/15/89 <br /> Benzene (ppb) a <0. 5 <0 . 5 <br /> Toluene (ppb) <0. 5 <0. 5 <br /> Xylenes (ppb) <0 . 5 <0. 5 <br /> Total BTEX (ppb) <0. 5 <0 . 5 <br /> Total Petroleum Hydrocarbons (ppb)" <1. 0 <1 . 0 <br /> Total Toxic Organics (ppb) - c - <br /> Trace Metals: (ppm) d _ <br /> Cadmium <br /> Chromium <br /> Copper - <br /> Lead <br /> Nickel - <br /> Zinc - - <br /> bppb = parts per billion <br /> < = Below Method Detection Limits <br /> c - = not sampled <br /> d ppm = parts per million <br /> '__C� GR0UNDN'ATER <br /> TECHNOLOGt'. INC. <br /> y <br />