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.� err rr r� rr mmmm r MM mmmr� ■r ! 2 .ANALYTICALRES GROUNDWATER 420 WEST tUM EMAN LANE, LOOI CALIFORNIA (An results In partsier-million) Monitoring Date Total Aromatic Volatile Organics EDB EDC Total Fecal Well Collected Petroleum Lead Coliform Hydrocarbons (MPN100mQ Gasoline Benzene Toluene Ethyl Total benzene Xylenes MW-1 10/16/90 + < < < < < <<0 0005 — «0 005 01/16/91 + < < < < < <<0 0005 <<0 0005 <<0 005 04/22/91 + < < < < < <<0 0005 «0 0005 «0 005 -- 07/08/91 + < < < < < <<0 0005 «0 0005 0 007 10/17/91++ < < < «0 0006 <<0 0006 «0 01 «0 0028 <<0 002 -01/21/92 * 0 045 00017 < < < — — _ — 03/12/92++ < < < < < <0 00001 - 04/20/92++ < < < < < MW-2 10/16/90 + < < < < < «0 0005 — «0 005 01/16/91 + < < < < < «0 0005 «0 0005 «0 005 >16 04/22/91 + < < < < < «0 0005 «0 0005 «0 005 >23 07/08/91 + < < < < < <<0 0005 «0 0005 0 006 >23 10/17/91++ < < < «0 0006 «0 0006 «0 01 «0 0028 «0 002 >23 01/21/92 * -- -- _- -- -- — — - 03/12/92++ - 04/20/92++ - - - — -- - — MW 3 10/18/90 + < < < < < «0 0005 — «0 005 — 01/16/91 + < < < < < <<0 0005 00015 «0 005 — 04/22/91 + < < < < < «0 0005 «0 0005 «0 005 07/08/91 + < < < < < <<0 0005 «0 0005 <<0 005 — 10117191++ < < < <<0 0006 «0 0006 «0 01 «0 0028 <<0 002 --- 01/21/92 * < < < < < 03/12/92++ < < < < < <0 00001 — — 04/20/92++ 009 00043 < NOTES < - Below Practical Ctuanitatlon Reporting Llmli Tri Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of Underground Tank Sites" August 10 1991 (POL for BTEX -0 0005 ppm and TPH as gasoline-0 05 ppm or Indicated detection limit) « - Less than Indicated detection limits EDB Ethylene dlbromlde EDC 1 2-dichloroethane Not sampled/not analyzed MPN/100ml- Most probable number per 190 milliliter sample volume Analyses performed by Sequoia + - Analyses performed by CCAS ++ Analyses performed by NET I Aegis Environmental Inc