Or. Admin. R. 690-210-0230
Inner casing installed into a well must meet the minimum requirements of well casing (OAR 690-210-0190). The space between the two well casings shall be sealed so as to prevent the movement of water between the two casings. Inner casing installed in a well shall extend or telescope at least eight feet into the lower end of the well casing. The inner casing must be centered and must be a minimum of one inch smaller in diameter than the outer casing if an under reaming method system is used. If other methods are used, the inner casing must be a minimum of two inches smaller in diameter than the outer casing. The grout must be placed in a positive manner in accordance with method A, B, D, or E (see Appendix 210-3).
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ORS 536.090, ORS 537.505-537.795, ORS 536.027, ORS 536.900 & ORS 537.992
ORS 536.090, ORS 537.505-537.795, ORS 536.900 & ORS 537.992
WRD 5-2023, amend filed 06/22/2023, effective 07/01/2023
WRD 5-2015, f. & cert. ef. 7-1-15
WRD 8-1993, f. 12-14-93, cert. ef. 1-1-94
WRD 13-1986, f. 10-7-86, cert. ef. 11-1-86, Renumbered from 690-061-0231
WRD 9-1978, f. 12-12-78, cert. ef. 1-1-79