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§1723.7 TITLE 14 OIL AND GAS (p. 94.14.14.15) ? (Register 8s,No.72—r,") 1723.4. Plugging at the Casing Stub. string (or strings),and When casing is recovered from inside anotheropposite the casing stub, a 100-foot the outer string (or strings) is cemented cement plug shall be required on the c dine recovered stub.A plug op n hole or from inside generally not be required when casing opposite the casing stub. another casing string that is not cemented NOTE:Authority cited:Sections 3013 and 3106,Public Resources Code.Reference:Sec- tions 3106 and 3228,Public Resources Code. HISTORY: (Register 76,No.39). 1. Amendment filed 9-21 76;effecdeiW NOTE filed 12 28 84;efftive thirtieth day 2. Amendment of section heading thereafter (Register 84,No.52). 1723.5. Surface Plugging. ed at the surface with at least a 25-foot The hole and all annuli shall berpaug a uire that inner strings of uncemented j cement plug.The district deputy y riot to lacement casing be removed to at least the base o the surface plug p p of the plug. d. All well casing shall be cut off at least 5 feet besteel late at least as thick as ow In urban areas, as defined in Section 1760(e), P the outer well casing shall be welded around the circ of the surface plug erence of the outer casing at the top of the casing, after division appr NOTE:Authority cited:Sections 3013 and 3106,Public Resources Code.Reference:Sec- tion 3106,Public Resources Code. HISTORY: 1. Amendment filed 9-21-76;effective thirtieth day thereafter (Register 76,No.3 2_ Amendment filed 6-30-80;effective thirtieth day thereafter (Register 80, No.27). 3. Amendment filed 12-28-84;effective thirtieth day thereafter (Register 84,No.52). 1723.6. Recovery of Casing. in the abandonment (a) Approval to recover all casing possible will be given of wells where subsurface plugging can be done to the satisfaction of the district deputy. fluinor to the detonation of any explosives (b) The hole shall o explosives be utilized only by a licensed handler with the in the hole.Such exp required permits. � ections 3013 and 3106,Public Resources Code.Reference:Sec- NOTE:Authority cited:Stions 3106 and 3228,Public Resources Code. HISTORY: 1. Amendment filed 9-21-76;effective thirtieth day thereafter (Register 76,No.39). 2. New NOTE filed 12-28-84;effective thirtieth day thereafter (Register 84,No.52) 1723.7. Inspection of Plugging and Abandonment Operations. b the divi Plu and abandonment operations that require witnessing y sion shall bemployee.When discretion e witnessed and approved by a division is indicated by these regulations, the district deputy shall determine which operations are to be witnessed. (a) Blowout prevention equipment—may inspect and witness testing of e uipment and installation. lacin and shall witness location q(b) Oil and gas zone plug—may witness p g and hardness. (c) Mudding of hole—may witness mudding operations and determine that specified physical characteristics of mud fluid are met.