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FIELD PERMEABILITY TEST PROJECT; San Luis BOREHOLE NO.: BN 2 JOB NO.; 14702 DATE: 07/13/88 VARIABLE HEAD METHOD INITIAL HT. TO WATER: 69.90 feet PIPE DIAMETER: 3.18 cm HT. TO 4ATER ADDED FOR TEST: 0.00 feet PfPE AREA: 7.92 cm2 TOTAL DEPTH OF BOREHOL E: 95.00 feet BOREHOLE DIAMETER: 15.24 cm TOP OF PIPE TO GROUND: 3.00 feet BOREHOLE AREA: 182.41 cm2 TOTAL DEPTH OF PIE20NE TER: 94.50 feet SCREEN LENGTH: 20.00 feet TOP OF SEAL: 42.00 fee[ BOTTOM OF SEAL: 49.00 feet Note: Bottom 7.7 feet of the sc reen was silted in. PERMEABILITY Date Tlme I ncrement Total water Change in Increm. Cimn. Elapsed Elapsed Level Nt. of Perm- Perm• Time Time Reading water ability ability 00/00/00 (Hrs.) (Sec.) (See.) (Ft.) (Ft.) K K (cm/sec) (cm/sec) 07/13/88 9.00 0.00 07/13/88 9.02 60 60 1.85 1.85 2.3E-OS 2.3E•OS 07/13/88 9,03 60 120 2.70 0.85 1.1E•OS 1.7E-OS 07/13/88 9,05 60 180 3.45 0.75 9.7E-06 1.5E-05 07/13/88 9.07 60 240 4.20 0.75 9.8E-06 1,3E•OS 07/13/88 9,08 ~60 300 4.95 0.75 1.OE•OS 1,3E•OS 07/13/88 9,10 60 360 5.55 0.60 B.OE•06 1.2E-05 07/13/88 9,12 60 420 6.30 0.75 1.OE•OS 1,2E•OS 07/13/88 9.13 60 480 6.85 0.55 7.6E-06 1. tE•OS 07/13/88 9.15 60 540 7.45 0.60 8.3E-06 1.1E-OS 07/13/88 9.17 60 600 8.20 0.75 1.0E-OS 1.1E•OS 07/13/88 9,25 300 900 10.65 2.45 7.1E•O6 9.6E-0b 07/13/88 9,33 300 1,200 13.00 2.35. 7.1E-06 8,9E-06 07/13/88 9.42 300 1,500 15.10 2.10 6.6E-0b 8.5E-06 07/13/88 9,50 300 1,800 17.10 2.00 6.5E-06 8.1E-Ob 07/13/88 9.58 300 2,100 18.85 1.75 5.9E•O6 7.8E-Ob 07/13/88 9.67 300 2,400 20.55 1.70 6.0E-06 7,bE•O6 07/13/88 9,75 300 2,700 22.10 1.55 5.6E-06 7.4E•Ob d2 ~n(2mL1 ~/ ` o J ~n N~ Note: Permeabil i[y calculations pef ormed using the following fornula: V h= 8-C_ (tL-tt? ~ _ p =Diameter, Intake, tm d =Diameter, Standpipe L =length, Intake { =Time, sec f{ = Piezomet ric Head Reference: winterkorn, Hens F- end Feng, Hsai•Yeng (1975)- (andation Engineering Handbook, Ven Most ranad Reinhold Company, New Tork, 32 p.