ARCHIVED REPORTS XR0003080 - Laserfiche WebLink

Home Browse Search

I Iltll IIII�I 11 It11 Ill[! 111111111111111 In 1111 VIII 11111111111111 IN US005605634A United States Patent [19] [11] Patent Number: 516059634 Wilson et al. [45] Date of Patent: Feb. 25, 1997 [541 TREATMENT OF CONTAMINATED GROUNDWATER [75] Inventors Ryan D Wilson, Kitchener, Canada, Douglas M Mackay, Stanford, Calif [73] Assignee University of Waterloo, Canada [211 Appi No 426,966 [22] Filed Apr 24, 1995 [30] Foreign Application Priority Data Apr 23 1994 [081 United Kingdom 9408125 [51] Int. Cl's _ _ CO2F 1100 [52] U S Cl 2101747, 2101170, 2101220, 435152, 4351128, 166/305 1 [581 Field of Search 210/610, 747, 210/749, 170, 194, 195 2, 220, 435/52, 128, 166/305 1 [561 References Cited U S PATENT DOCUMENTS 3 846,290 11/1974 Raymond 210/610 4,401,569 8119$3 ]haver( et al - - - 210(147 4,478,765 10/1984 Tubbs --- _ 210/170 4,755,304 7/1988 Hallberg et al - _ _ 2101747 5,006,250 411991 Roberts et al 210/747 5,171,104 1211992 Bernhardt _ 210/170 5,302,286 4/1994 Sempnnt et al 210/170 5,384,048 1/1995 Hazen et al 21on47 5456,550 10/1995 Devhn _ 405/128 Pantry E=mnrer—Chnstopher Upton Attorney, Agent, or Fine ----Anthony Asquith & Co [571 ABSTRACT The system places traces of nutrients and other treatment substances in the ground, in the path of an on -coming plume of contaminated groundwater Boreholes placed across the plume contain respective diffusion tubes, the tubes being of e g LDPE, or dialysis tubing The remediation substance is Circulated (pumped) through the diffusion tubes periodically The remediation substance diffuses through the LDPE into the water in the borehole, and thence into the plume and is carred into the aquifer MAKE-UP RESERVOIR STOCK 50 TANK 11 Claims, 3 Drawing Sheets SAMPLE 45 49 POINT ��43_�• s G.ONTROL E. I c:4 27 C.