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� I <br /> Table 1 30-0140 <br /> Summary of Results of Ground Water Monitoring and Sampling <br /> Former Mobil Station 04-NP4 <br /> 2375 Tracy Boulevard, Tracy, California <br /> Concentrations in parts per billion (ppb) <br /> ____ =s=s--ss=o�==--�-saxzzeaaaa-az�e=xaassscpeeaacssc�=e==a.=rspe==e===ssc=== --eea-_== <br /> WELL DATE OF CASING DEPTH GROUND FREE TPH-G 9 T E X FC FS LAB <br /> ID SAMPLING/ ELEVATION TO HATER PRODUCT -(CFU/ (CFU/ <br /> MONITORING (ft-msl) WATER (ft) ELEVATION THICKNESS -100m1) 100m1) <br /> AMW-5 r 12/10/91=--==26 19 =-=-=5=95- 20 24 0 00 ND<30 ND<0 30-aaND<0-30 --ND<0 30 ND<O 30 - - --- SEG <br /> AMW-5 03/25/92 26 19 5 39 20 80 0 00 72 4 8 ND<O 30 ND<0 30 ND<0 30 --- --- SEG <br /> AMW-6 12/10/91 26 33 5 85 20 48 0 00 ND<30 ND<O 30 ND<O 30 ND<0 30 ND<O 30 140 --- SEQ <br /> AMW-6 03/25/92 26 33 4 86 21 47 0 00 97 43 N9<0 30 7 4 6 1 <3 8 <3 8 SEQ <br /> EXPLANATION TO ABBREVIATIONS <br /> - <br /> TPH-G total petroleum hydrocarbons as gasoline 0 MW-5 was additionally tested for the following <br /> B benzene Method Analyte Amount-Found <br /> T :toluene sass--air=razzaeass=s==��==ears___=nn_ -aaa==xm- <br /> E ethylbenzene 120 1 Conductivity 1286 umthos/cm <br /> X total xylenes 160 1 Total Suspended Solids 789 mg/l <br /> FC Fecal Coliform (CFU = Colony Forming Units) 160 1 Total Dissolved Solids 953 mg/l <br /> FS Fecal Streptococci (CFU - Colony Forming Units) 410 4 Chemical Oxygen Demand 190 <br /> --- not sampled/not measured 360 1 Dissolved Oxygen 1 3 mg/t <br /> NA not applicable/not available NA PH 7 60 <br /> ND not detectable at or above reported detection limits <br /> CAL Chromalab, incorporated <br /> SAL Superior Analytical Laboratory <br /> SEG Sequoia Analytical Laboratory <br /> NOTES Casing elevations were surveyed with respect to most southwesterly anchor bolt of the signal standard located <br /> at the most southerly return of the southwesterly corner of the intersection of Grant Line Road and <br /> Tracy Boulevard (elevation - 26.13) <br /> * Equivalent ground water elevation calculated assuming 0 8 specific gravity for free-floating product <br /> -------- -- --------- ------ <br /> if - <br /> ------------------------------------------------------------------------------------------------------------ <br /> ih <br /> 18-Jun-92 Page 6 of 6 <br />