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TABLE 9 <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 TPHgMTBE Fuel <br /> Elev Water Elev BenzeneL .-Oxygenates <br /> Muni 1029/91 NS NM NM <0 30 <0 30 <0 30 <0 30 <30 — — <br /> Well 12/03192 NS NM NM <0 5 <0 5 <0 5 <0 5 <50 — — <br /> 0329/96 NS NM NM <0 5 <D5 <0 5 <0 5 <50 — -- <br /> 0628/96 NS NM NM <05 <0 5 <0 5 <05 <50 — — <br /> 10104/96 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 /> 0325/97 NS N M NM <0 50 <0 50 <0 50 <0 50 <50 — — <br /> 06125/97 NS NM NM <05 <0 5 <0 5 <05 <50 — — <br /> 09/18/97 NS NM NM <05 <0 5 <0 5 <0 5 <50 — <MDLs <br /> 12/16/97 NS 16 90' NS <05 <0 5 <0 5 <2 <50 — -- <br /> 0320/98 NS 11 51' NS <0 5 <0 5 <0 5 <2 <50 <5 <MDLs <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/I = micrograms per liter or parts per billion <br /> < = not detected at or above Stated Method Detection Limit (MDL) <br /> -- = not sampled <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 8020 <br /> NM = Not Monitored <br /> NS = Not Surveyed <br /> = measurement collected from top of sounding tube <br /> Fuel Oxygenates by EPA 8260 include TBA, MTBE, DIPE, ETBE, and TAME See Laboratory Data Sheets for MDLs <br /> W 49A3284TABLES4TABLEGWXXLS(Wi J/88i <br />