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FMS #24 Site Investigation Report California Arm National Guard • Table 3-6. Stockton FMS #24 Groundwater Sample Results TPH in µg/L Units for April / May and October 2007 Sam le Location Collection Date Sample Depth ftbgs) TPHD Taste and Odor Threshold: TPHM TPHG PHASE 1 — Alpha Analytical 100 5 FMS24SBOI-07-NS 04/30/2007 40 FMS24SB02-07-NS 05/01/2007 40 7' 5, 450,000 FMS24SB03-07-NS 05/02/2007 40 NAA NA A 300,000 FMS24SB04-07-NS 05/02/2007 40 160 370 200,000 FMS24SB05-07-FD 05/03/2007 40 1,000 1,200 350,000 FMS24SB05-07-NS 05/03/2007 40 6,500 770 240,000 PHASE 2 — Field Portable 2'200 510 240,000 FMS24SB06-01-EB 10/04/2007 5 (Equipment Blank) <100 NS <100 FMS24SB06-10-NS 10/04/2007 45 FMS24SB07-10-NS 10/04/2007 45 54,000 NS 64,000 FMS24SB08-10-NS 10/04/2007 45 5,000 NS <I00 FMS24SB08-10-FD 10/04/2007 45 5100 NS <100 FMS245B09-10-NS 10/05/2007 45 <100 NS <100 FMS24SBIO-10-NS 10/05/2007 45 5100 NS 5100 FMS24SB11-10-NS PHASE 10/05/2007 45 <100 <100 NS NS 5100 2 —Alpha Analytical • ---_ <100 -- -- -,,..I wwwiiUGi 45 250 NS FMS = Field Maintenance Shop 2,100 NA = not analyzed NS = not sampled TPH = total petroleum hydrocarbons TPHD = total petroleum hydrocarbons as diesel TPHG = total petroleum hydrocarbons as gasoline TPHM = total petroleum hydrocarbons as motor oil 99/L = micrograms per liter K:\Wprocess\00251\CA ARNG\Stockton FMS 24 SMIDraft_dev.doc B-17 December 2007