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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/0 <br /> Well ID Date Wellhead Depth to G W Benzene Toluene Ethyl Xylenes TPHg <br /> Elev Water I Elev Benzene <br /> Muni 10/29/91 NM NM NM <0 30 <0 30 <0 30 <0 30 <30 <br /> Well 12/03/92 NM NM NM <0 5 <0 5 <0 5 <0 5 <50 <br /> 03/29/96 NM NM NM <0 5 <0 5 <0 5 <0 5 <50 <br /> 06/28/96 NM NM NM <0 5 <0 5 <0 5 <0 5 <50 <br /> 10/04/96 NM NM NM <0 50 <0 50 <0 50 <0 50 <50 <br /> 12/17/96 NM NM NM <0 5 <0 5 <0 5 <0 5 <50 <br /> 03/25/97 NM NM NM <0 50 <0 50 <0 50 <0 50 <50 <br /> 06/25/97 NM NM NM <0 5 <0 5 <0 5 <0 5 <50 <br /> 09/18/97 NM NM NM <0 5 <0 5 <0 5 <0 5 <50 <br /> 12/16/97 NS 16 90" NS <0 5 <0 5 <0 5 <2 1 <50 <br /> Notes <br /> ft MSL denotes feet, Mean Sea Level, based on assumption that ground surface datum 1s 10 feet <br /> above MSL (USGS 7 5 minute Thornton Quadrangle) <br /> ugh denotes micrograms per liter or parts per billion <br /> < denotes not detected at or above Stated Method Detection Limit <br /> -- denotes not sampled <br /> TPHg denotes Total Petroleum Hydrocarbons as gasoline, analyzed by EPA Method 5030/8015 <br /> NM denotes Not Monitored <br /> NS denotes Not Surveyed <br /> " denotes measurement collected from top of sounding tube <br /> W 1943281TABLMTABLEGW XLS[1112!8131 <br />