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TABLE 1 • <br /> SUMMARY OF GROUNDWATER MONITORING AND ANALYTICAL RESULTS <br /> Gardner Property,Thornton, CA <br />• Page 7 of 7 <br /> (measured in feet MSL) (Reported in ug/1) <br /> Well ID Date Wellhea Depth to G W Benzene Toluene EthylXylenes TPHg MTBE Fuel Dissoved <br /> Elev Water Elev I.Benzene (EPA 8020)lOxygenates Oxygen <br /> Muni 10/29/91 NS NM NM <0 30 <0 30 <0 30 <0 30 <30 — --Well 12/03/92 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 — -- — <br /> 03/29/96 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 — - -- <br /> 06/28/96 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- -- -- <br /> 10/04/96 NS NM NM <0 50 <0 50 <0 50 <0 50 <50 -- -- -- <br /> 12/17/96 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- -- -- <br /> 03/25/97 NS NM NM <0 50 <0 50 <0 50 <0 50 <50 -- -- <br /> 06/25/97 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- -- -- <br /> 09/18/97 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 -- <MDLs — <br /> 12/16/97 NS 16 90* NS <0 5 <0 5 <0 5 <2 <50 -- -- -- <br /> 03/20/98 NS 11 51* NS <0 5 <0 5 <0 5 <2 <50 <5 <MDLs — <br /> 06/30/98 NS 21 92* NS <0 50 <0 50 <0 50 <0 50 <50 -- <MDLs -- <br /> 09/29/98 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 -- -- -- <br /> 12/23/98 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 <2 5 -- -- <br /> 04/05/99 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 <5 <br /> 07/09/99 NS NM NS <0 50 <0 50 <0 50 <0 50 <50 <2 5 <br /> 10/07199 NS NM NS <0 500 <0 500 <0 500 <0 500 <50 0 -- -- -- <br /> i <br /> Notes <br /> ft MSL = feet, Mean Sea Level, assuming ground surface datum is 10 feet above MSL(USGS 7 5 minute Thornton Quadrangle) <br /> ug/l = micrograms per liter or parts per billion <br /> < = not detected at or above Stated Method Detection Limit(MDL) <br /> — = not sampled/not analyzed <br /> TPHg = Total Petroleum Hydrocarbons as gasoline, analyzed by EPA Method 5030/8015 <br /> Benzene by EPA Method 8020 <br /> Toluene by EPA Method 8020 <br /> Ethylbenzene by EPA Method 8020 <br /> Total Xylenes by EPA Method 8020 <br /> Methy-t-butyl ether(MTBE)by EPA Method 8020 <br /> NM = Not Monitored <br /> NS = Not Surveyed <br /> * = measurement collected from top of sounding tube <br /> Fuel Oxygenates by EPA Method 8260 includes ethonol,t-butanol, MTBE, DIPE, ETBE, and TAME See Laboratory Data Sheets for MDLs <br /> Dissoved Oxygen by EPA Method 360 1 <br /> W M5821TABLE51Tsblegw X11!30!1999] <br />