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'T <br /> 5.0 CONCLUSIONS ANI) ItgCOAi14 ENI)ATIONS <br /> k. <br /> events all round water liar,been found to be noncletectsble for TL-'1 I- <br /> After two sampling <br /> detected <br /> diesel and IiT'CX• Recent sampling indicates that concentrations els bei cath t le sites The most <br /> Toluene and'Total Xylenes are no longer at measurable levels <br /> petroleum hydrocarbons <br /> recent precipitation event failed to generate�ipital on events should do likewise. Natural <br /> in the ground water bclaNreduce 1ny future existi g hydrocarbons in the soil. <br /> biodegradation will also <br /> exc <br /> al be left <br /> In view of these results, ESL recommends that tilt former tank terasamoles on a�quarterly <br /> in place AT&T should obtain c,;+o additional sets of ground `eatir of monitoring. Sampling <br /> basis to confirm the initial results of sampling and complete a y <br /> should take place near the elates August 6 and NovembeC �� <br /> 1991. If analytical results <br /> remain below State <br /> of California Action Levels,ESI:will request that no further Bo rd <br /> ranted from the County and the <br /> Regional <br /> required and that written site closure beg subject facility, <br /> in regard to the former underground diesel tank at the <br /> T T - - ----- - - -- -- - - - 9 <br />