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Well Monitoring Form <br /> Client . Pestana Trust <br /> Site Address : 275 Grant Line Road, Tracy , CA <br /> Date: June 8 , 1993 <br /> Agency Representative: Ms . Mary Meays , Senior REHS <br /> San Joaquin County PHS/EHD <br /> Representative Contacted Prior to Sampling Yes <br /> Total Well Depth: 19 82 ' Monitoring Well : MW-2 <br /> Depth to Water : 6. 80 ' Purge Method: Disposable Bailer <br /> Water Column <br /> Height . . . . . 13 . 02 ' x 0 .17 = 2 21 gallons (1 well volume) <br /> 3 x 2 . 21 gallons = 6 . 6 gallons (three well volumes <br /> is typically the minimum number of <br /> gallons purged from a monitoring <br /> well prior to obtaining samples ) <br /> . Time Gallons Temperature pH Conductivity <br /> Removed <br /> --------- -----(Degrees-F) (umhos/cm) <br /> ------`--r-__ -_ <br /> 1 : 57 0 71. 2 11 . 16* 1160** <br /> 2 : 13 2 . 4 68 9 7 30 3330 <br /> 2 : 23 4 8 68 . 6 7 28 3330 <br /> 2 : 33 7 . 2 68. 5 7 . 27 3380 <br /> 2 . 45 9 . 6 68 . 7 7 . 26 3360 <br /> */** These readings may be the result of carbonate <br /> formation on the bottom of the well cap . The pH <br /> reading was checked colorometrically and found to <br /> be accurate. <br /> Contaminant Odor : None <br /> Turbidity Level : Low to moderate, water light-brown in <br /> color <br /> Sheen on Water: No <br /> Time of Sample Collection : 2 : 55 pm <br /> Witnessed by . No witness <br /> Samplers Signature: <br /> Page 9 <br />