ARCHIVED REPORTS XR0010231 - Laserfiche WebLink

Home Browse Search

TABES;'1 HISTORICAL GROUNDWATER DATA Former Discovery Chevrolet 1615 1P Street Tracy, California Well. No./ Date Total Depth to Groundwater Floating Chlorinated Elev.' Sampled Depth' Water Elevation Product TPHg Benzene Toluene Ethylbenzene Xylenes MTBE TPHd 0&G Halocarbons ft.) (ft.) (ft.) ft.) b) b) b) b) b) b) b) b) b) MW-3/ 08/13/96 19.5 11.48 34.11 ---- na na na na na na 60 na nd 45.59 11/21/96 19.5 10.46 35.13 ---- na na na na na <5 <50 na nd 03/18/97 19.5 10.33 35.26 --- <50 <0.5 <0.5 <0.5 <0.5 <5 <50 na na 06/12/97 19.5 10.58 35.01 ---- monitored only; groundwater sample not collected 09/17/97 19.5 10.72 34.87 ---- monitored only; groundwater sample not collected MW-4/ 04/04/97 20,0 10.75 34.81 ---- 415 1.1 0.5 10.9 35.5 na na na na 45.56 06/12/97 20.0 10.89 34.67 ---- <50 0.5 <0.5 2.0 3.7 <5 na na na 09/17/97 20.0 11.06 34.50 --- <50 <0.5 <0.5 <0.5 <0.5 <5.0z na na na MW-5/ 04/04/97 20.0 10.21 34.93 ---- <50 <0.5 <0.5 <0.5 <0.5 na na na na 45.14 06/17/97 20.0 10.40 34.74 ---- <50 <0.5 <0.5 <0.5 <0.5 <5 na na na 09/17/97 20.0 10.55 34.59 ---- <50 <0.5 <0.5 <0.5 <0.5 <5.02 na na na Trip Blank 06/12/97 ---- ---- ---- --- <50 <0.5 <0.5 <0.5 <0.5 <5 na na na 09/17/97 ---- --- --- ---- <50 <0.5 <0.5 <0.5 <0.5 <5 na na na Explanation: Analytical Laboratory: TPHg = TotaI Petroleum Hydrocarbons as gasoline O&G = Oil and Grease American Environmental Network(FLAP#1172) TPHd = TotaI Petroleum Hydrocarbons as diesel ppb = parts per billion BTEX = Benzene, Toluene, Ethylbenzene, and total Xylenes ft. = feet Analytical Methods: MTBE = Methyl t-Butly Ether na = not analyzed TPHg: EPA Methods5030/8015(GCFID) nd = none detected at or above laboratory reporting limits ---- = not applicable TPHd: EPA Method 3510/8015 (GCFID) Oxygenates = t-butanol (TBA), MTBE, di-isopropyl ether(DIPE), BTEX/MTBE: EPA Method 8020 ethyl-t-butyl ether(ETBE), and t-amylmethyl ether(TAME). O&G: Standard Method 5520 B&F I Measured from surveyed top of the north side of the well casing. Well casing elevations surveyed to MSL by Virgil Chavez Land Surveying(PLS #6323). Also analyzed for oxygenates by EPA Method 8260. None of the oxygenate compounds were detected. 3 Also analyzed for oxygenates by EPA Method 8260. MTBE detected at a concentration of 6 ppb. MTBE reported as not detected by EPA 8020. 8I46.045 Page 2 of 2