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x r Van 11os1[i1'k t;l11f,1740 Houston Avenue.Stockton.C'A Range Soil Type Velocity Range X axis dispersivity 1.7 ft 0.1-10 Gravel up to 3 ft/d Y axis dispersivity 0.561 ft (0.33-0.65)D Coarse Sand up to 1.5 R/d Distance parallel to direction of GW flow 59 ft Clean Sand up to 1.0 Wd Distance perpendicular to direction of GW flow 0 ft Fine Sand up to 0.5 ft/d Groundwater velocity 0_07 ft/day 0.01-3.0Silty Sand up to 0.1 Wd Source concentration 1.10E+03 ugfL 1.10E+00 Sandy Silt 0.01-0.05 ft/d Rate of discharge 25 ft'lyr mg/L Silt 0.01 Wd Discharge duration ordt 8.33E-02 yr Soil Type Date Release Discoverc Mass discharged per unit depth(CaQdr) 3.00E+06 ug/ft 1 ine,Silty Sand 1/1/1998 3.00E+00 glft Date of 1st Monit.Even Distance(X,)to DG well 2 105 ft 5/6/1999 Distance(Y2)perpendicular to direction of flow 0 ft Clayey gravel(<10 fbg) GW at--10-12 fbg Distance(X3)to drinking water well 1700 ft Fine Sand(10-15 fbg) Distance(Y3)perpendicular to direction of flow 0 ft Silty Sand(15-40 fbg) Maximum concentration in drinking water well 4.96 uglL Aquiclude(40-120 fbg) Time when plume reached its peak in DW well 24000 days Time when plume first reached 5 uglL in DW well 0 days Time remaining for plume to reach 5 u L in DW well -4.0 years Well Name Well No Distance(x) Distance(y) C(uglL) Time(days) Downgradient Well 1 at Ti 11lV4 59 0 660 510 Tz 341) 630 T3 660 720 T4 200 870 T5 290 960 j T6 270 1080 T7 51 1170 Ts 100 1280 T9 290 1370 T I D 91 1460 T1, 16 1573 T12 T13 T14 T,5 Date of Last Record 4/1712003 Date of First Record 4.+'412002 Downgradient Well 2 at T, 3IWI) I05 0 0 1215 TZ 58 1385 T3 66 1460 T4 80 1573 .1.5 T6 T, Tg T9 TIO TI, T12 T13 T1s T15 Date of Last Record Date of First Record Comment Max Time(data) 1460 CD =, r •~ CT11 r3 CJ