means as (r) Maximum as applied to BAT effluent limitations and NSPS for drilling fluids and drill cuttings means the maximum concentration allowed as measured in any single sample of the barite for determination of cadmium and mercury content. (s) Maximum for any one day as applied to BPT, BCT and BAT effluent limitations and NSPS for oil and grease in produced water means the maximum concentration allowed measured by the average of four grab samples collected over a 24-hour period that are analyzed separately. Alternatively, for BAT and NSPS the maximum concentration allowed may be determined on the basis of physical composition of the four grab samples prior to a single analysis. (t) Maximum weighted mass ratio averaged over all NAF well sections for BAT effluent limitations and NSPS for base fluid retained on cuttings means the weighted average base fluid retention for all NAF well sections as determined by the API Recommended Practice 13B-2, using the methods and averaging calculations presented in Appendix 7 of subpart A of this part. (u) Method 1654 A refers to Method 1654, Revision A, entitled “PAH Content of Oil by HPLC/UV," December 1992, which is published in Methods for the Determination of Diesel, Mineral, and Crude Oils in Offshore Oil and Gas Industry Discharges, EPA-821-R-92–008. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from the National Technical Information Service, Springfield, VA 22161, 703-605 6000. Copies may be inspected at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/ federal register/ code_of_federal_regulations/ ibr locations.html. A copy may also be inspected at EPA's Water Docket, 1200 Pennsylvania Ave., NW., Washington, DC 20460. (v) Minimum as applied to BAT effluent limitations and NSPS for drilling fluids and drill cuttings means the minimum 96-hour LCs. value allowed as measured in any single sample of the discharged waste stream. Minimum as applied to BPT and BCT effluent limitations and NSPS for sanitary wastes the minimum concentration value allowed as measured in any single sample of the discharged waste stream. (w)(1) New source means any facility or activity of this subcategory that meets the definition of “new source" under 40 CFR 122.2 and meets the criteria for determination of new sources under 40 CFR 122.29(b) applied consistently with all of the following definitions: (i) Water area as used in "site" in 40 CFR 122.29 and 122.2 means the water area and water body floor beneath any exploratory, development, or production facility where such facility is conducting its exploratory, development or production activities. (ii) Significant site preparation work as used in 40 CFR 122.29 means the process of surveying, clearing or preparing an area of the water body floor for the purpose of constructing or placing a development or production facility on or over the site. (2) "New Source" does not include facilities covered by an existing NPDES permit immediately prior to the effective date of these guidelines pending EPA issuance of a new source NPDES permit. (x) No discharge of free oil means that waste streams may not be discharged that contain free oil as evidenced by the monitoring method specified for that particular stream, e.g., deck drainage or miscellaneous discharges cannot be discharged when they would cause a film or sheen upon or discoloration of the surface of the receiving water; drilling fluids or cuttings may not be discharged when they fail the static sheen test defined in Appendix 1 of subpart A of this part. (y) Parameters that are regulated in this Subpart and listed with approved methods of analysis in Table 1B at 40 CFR 136.3 are defined as follows: (1) Cadmium means total cadmium. (2) Chlorine means total residual chlorine. (3) Mercury means total mercury. (4) Oil and Grease means total recoverable oil and grease. (Z) PAH (as phenanthrene) means (ff) Solids control equipment means polynuclear aromatic hydrocarbons re- shale shakers, centrifuges, mud cleanported as phenanthrene. ers, and other equipment used to sepa(aa) Produced sand means the slurried rate drill cuttings and/or stock barite particles used in hydraulic fracturing, solids from drilling fluid recovered the accumulated formation sands and from the wellbore. scales particles generated during pro- (gg) SPP toxicity as applied to BAT efduction. Produced sand also includes fluent limitations and NSPS for drilldesander discharge from the produced ing fluids and drill cuttings refers to water waste stream, and blowdown of the bioassay test procedure presented the water phase from the produced in Appendix 2 of subpart A of this part. water treating system. (hh) Static sheen test means the stand(bb) Produced water means the water ard test procedure that has been devel(brine) brought up from the hydro- oped for this industrial subcategory for carbon-bearing strata during the ex- the purpose of demonstrating complitraction of oil and gas, and can include ance with the requirement of no disformation water, injection water, and charge of free oil. The methodology for any chemicals added downhole or dur- performing the static sheen test is preing the oil/water separation process. sented in Appendix 1 of subpart A of (CC) Production facility means any this part. fixed or mobile structure subject to (ii) Stock barite means the barite that this Subpart that is either engaged in was used to formulate a drilling fluid. well completion or used for active re- (jj) Stock base fluid means the base covery of hydrocarbons from producing fluid that was used to formulate a formations. drilling fluid. (dd) Sanitary waste means the human (kk) Synthetic material as applied to body waste discharged from toilets and synthetic-based drilling fluid means urinals located within facilities subject material produced by the reaction of to this Subpart. specific purified chemical feedstock, as (ee) Sediment toricity as applied to opposed to the traditional base fluids BAT effluent limitations and NSPS for such as diesel and mineral oil which drilling fluids and drill cuttings refers are derived from crude oil solely to the ASTM E 1367–92 method: through physical separation processes. "Standard Guide for Conducting 10-day Physical separation processes include Static Sediment Toxicity Tests with fractionation and distillation and/or Marine and Estuarine Amphipods,” minor chemical reactions such 1992, with Leptocheirus plumulosus as cracking and hydro processing. Since the test organism and sediment prepa- they are synthesized by the reaction of ration procedures specified in Appendix purified compounds, synthetic mate3 of 40 CFR part 435, subpart A. This in- rials suitable for use in drilling fluids corporation by reference was approved are typically free of polycyclic aroby the Director of the Federal Register matic hydrocarbons (PAH's) but are in accordance with 5 U.S.C. 552(a) and 1 sometimes found to contain levels of CFR part 51. Copies may be obtained PAH up to 0.001 weight percent PAH from the American Society for Testing expressed as phenanthrene. Internal and Materials, 100 Barr Harbor Drive, olefins and vegetable esters are two exWest Conshohocken, PA, 19428. Copies amples of synthetic materials suitable may be inspected at the National Ar- for use by the oil and gas extraction inchives and Records Administration dustry in formulating drilling fluids. (NARA). For information on the avail- Internal olefins are synthesized from ability of this material at NARA, call the isomerization of purified straight202-741-6030, or go to: http:// chain (linear) hydrocarbons such as www.archives.gov/federal_register/ C16-C18 linear alpha olefins. C16-C18 lincode_of_federal_regulations/ ear alpha olefins are unsaturated hyibr_locations.html. A copy may also be drocarbons with the carbon to carbon inspected at EPA's Water Docket, 1200 double bond in the terminal position. Pennsylvania Ave., NW., Washington, Internal olefins are typically formed DC 20460. from heating linear alpha olefins with as a tively. Hexadecene is an unsaturated hydrocarbon with carbon chain length of 16, an internal double carbon bond, and is represented by the Chemical Abstracts Service (CAS) No. 26952– 147. Octadecene is an unsaturated hydrocarbon with a carbon chain length of 18, an internal double carbon bond, and is represented by the Chemical Abstracts Service (CAS) No. 27070-58–2. (Properties available from the Chemical Abstracts Service, 2540 Olentangy River Road, PO Box 3012, Columbus, OH, 43210). (ss) C16-C18 internal olefin drilling fluid means a C16-C18 internal olefin drilling fluid formulated as specified in Appendix 8 of subpart A of this part. (tt) C12-C14 ester and Co ester means the fatty acid/2-ethylhexyl esters with carbon chain lengths ranging from 8 to 16 and represented by the Chemical Abstracts Service (CAS) No. 135800-37-2. (Properties available from the Chemical Abstracts Service, 2540 Olentangy River Road, PO Box 3012, Columbus, OH, 43210) a catalyst. The feed material for synthetic linear alpha olefins is typically purified ethylene. Vegetable esters are synthesized from the acid-catalyzed esterification of vegetable fatty acids with various alcohols. EPA listed these two branches of synthetic fluid base materials to provide examples, and EPA does not mean to exclude other synthetic materials that are either in current use or may be used in the future. A synthetic-based drilling fluid may include a combination of synthetic materials. (11) Well completion fluids means salt solutions, weighted brines, polymers, and various additives used to prevent damage to the well bore during operations which prepare the drilled well for hydrocarbon production. (mm) Well treatment fluids means any fluid used to restore or improve productivity by chemically or physically altering hydrocarbon-bearing strata after a well has been drilled. (nn) Workover fluids means salt solutions, weighted brines, polymers, or other specialty additives used in a producing well to allow for maintenance, repair or abandonment procedures. (00) 4-day LCs. as applied to the sediment toxicity BAT effluent limitations and NSPS means the concentration (milligrams/kilogram dry sediment) of the drilling fluid in sediment that is lethal to 50 percent of the Leptocheirus plumulosus test organisms exposed to that concentration of the drilling fluids after four days of constant exposure. (pp) 10-day LCs. as applied to the sediment toxicity BAT effluent limitations and NSPS means the concentration (milligrams/kilogram dry sediment) of the base fluid in sediment that is lethal to 50 percent of the Leptocheirus plumulosus test organisms exposed to that concentration of the base fluids after ten days of constant exposure. (qq) 96-hour LC5. means the concentration (parts per million) or percent of the suspended particulate phase (SPP) from a sample that is lethal to 50 percent of the test organisms exposed to that concentration of the SPP after 96 hours of constant exposure. (rr) C16-C18 internal olefin means a 65/ 35 blend, proportioned by mass, of hexadecene and octadecene, respec or Base fluid re- For NAFs that meet tained on the stock limitacuttings. tions (Cio-Cis in ternal olefin) in this table, the maximum weighted mass ratio averaged over all NAF well sections shall be 6.9 gNAF base fluid/ 100 g-wet drill cuttings. 10 the C1-C14 ester cuttings. Well treatment, com- Oil and The maximum for pletion, and grease. any one day shall workover fluids. not exceed 42 ceed 29 mg 1. Deck drainage Free oil No discharge.“ Produced sand No discharge. Domestic Waste Foam No discharge. All Alaskan facilities are subject to the drilling fluids and drill cuttings discharge limitations for facilities located beyond 3 miles offshore. 2 As determined by the suspended particulate phase (SPP) toxicity test (Appendix 2 of subpart A of this part). 3 As determined by the static sheen test (appendix 1). 4 As determined by the presence of a film or sheen upon or a discoloration of the surface of the receiving water (visual sheen). 5 PAH mass ratio = Mass (g) of PAH (as phenanthrene) Mass (g) of stock base fluid as determined by EPA Method 1654, Revision A (specified at $435.11(u)) entitled "PAH Content of Oil by HPLCNV," December 1992, which is published in Methods for the Determination of Diesel, Mineral, and Crude Oils in Offshore Oil and Gas Industry Discharges, EPA-821-R-92-008. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from the National Technical Information Service, Springfield, VA 22161, 703–605-6000. Copies may be inspected at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202–741-6030, or go to: http://www.archives.gov/ federal_register/code_of_federal_regulations/ ibr_locations.html. A copy may also be inspected at EPA's Water Docket, 1200 Pennsylvania Ave., NW., Washington, DC 20460. 6 Base fluid sediment toxicity ratio = 10-day LCs. of Co-his internal olefin/10-day LCs, of stock base fluid as determined by ASTM E 1367-92 (specified at $435.11(ee)] method "Standard Guide for Conducting 10-day Static Sediment Tax icity Tests with Marine and Estuarine Amphipods, 1992, after preparing the sediment according to the method specified in Appendix 3 of subpart A of this part. This incorporation by ret erence was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA, 19428. Copies may be inspected at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/tederal_register code_of_federal__regulations/ibr_locations.html. À COPY may also be inspected at EPA's Water Docket, 1200 Pennsy! vania Ave., NW., Washington, DC 20460. Biodegradation rate ratio = Cumulative gas production (m) of Cio-C18 internal olefin Cumulative gas production (ml) of stock base fluid, both at 275 days as determined by ISO 11734:1995 (specified at $435.11(e)] method: "Water qual ity-Evaluation of the 'ultimate anaerobic biodegradability of organic compounds in digested sludge—Method by measurement of the biogas production (1995 edition)" as modified for the marine environment (Appendix 4 of subpart A of this part) This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from the American National Standards Institute, 11 West 42nd Street, 13th Floor, New York, NY 10036. Copies may be inspected at the National Archives and Records Administration (NARA). For in formation on the availability of this material at NARA, call 202-741-6030, go to: http://www.archives.gov federal_register/code_of federal_regulations ibr_locations.html. A copy may also be inspected at EPA's Water Docket, 1200 Pennsylvania Ave., NW., Washington, DC 20460. 8 Drilling fluid sediment toxicity ratio = 4-day LCs. of Cincin internal olefin drilling fluid/4-day LCs. of drilling fluid removed from drill cuttings at the solids control equipment as determined by ASTM E 1367–92 (specified at $ 435.11(ee)) method: "Standard Guide for Conducting 10-day Static Sediment Toxicity Tests with Marine and Estuarine Amphipods." 1992 after preparing the sediment according to the method specfied in Appendix 3 of subpart A of this part. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA, 19428. Copies may be inspected at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, to: http://www.archives.gov federal_register/code_of_federal_regulations' ibr_locations.html. A copy may also be inspected at EPA's Water Docket, 1200 Pennsylvania Ave., NW., Washington, DC 20460. As determined before drilling fluids are shipped offshore by the GC/MS compliance assurance method (Appendix 5 of subpart A of this part), and as determined prior to discharge by the RPE method (Appendix 6 of subpart A of this part) applied to drilling fluid removed from drill cuttings. If the operator wishes to confirm the results of the RPE method (Appendix 6 of subpart A of this part). the operator may use the GC/MS compliance assurance method Appendix 5 of subpart A of this part). Results from the GC/MS compliance assurance method (Appendix 5 of subpart A of this part) shall supercede the results of the RPE method (Appendix 6 of subpart A of this part). 10 Maximum permissible retention of non-aqueous drilling fluid (NAF) base fluid on wet drill cuttings averaged over drilling intervals using NAFs as determined by the API retort method (Appendix 7 of subpart A of this part). This limitation is applicable for NAF base fluids that meet the base fluid sediment toxicity ratio (Footnote 6), biodegradation rate ratio (Footnote 7), PAH, mercury, and cadmium stock limitations Cio-Cig internal olefin) defined above in this table. or |
