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HomeMy WebLinkAbout992879.tiff EXHIBIT INVENTORY CONTROL SHEET Case ORD#89-KK Exhibit Submitted By Exhibit Description A. Planning Staff Planning Commission Hearing Exhibit B. Planning Staff Planning Commission Hearing Exhibit C. Ken Wonstolen Suggested Amendment D. Brent Coan Testimony comments E. F. G. H. J. K. L. M. N. Q. P. Q. R. S. T. U. V. 992879 BEFORE THE WELD COUNTY, COLORADO, PLANNING COMMISSION RESOLUTION OF RECOMMENDATION TO THE BOARD OF COUNTY COMMISSIONERS Moved by Bryant Gimlin that the following resolution be introduced for passage by the Weld County Planning Commission with changes concerning buildings classed from R and above in the Uniform Building Code as buildings not allowed within the 150 foot setback from Oil and Gas Production Facilities . Be it resolved by the Weld County Planning Commission that the application for ORDINANCE 89KK-AMENDMENTS TO WELD COUNTY ZONING ORDINANCE PLANNER: Monica Daniels-Mika REQUEST: The addition of Section 84, Amendments of Sections 31.5.5, 36.3.12, and 61.3 of the Weld County Zoning Ordinance 89JJ be recommended favorably to the Board of County Commissioners for the following reasons: 1. An amendment of the Weld County Ordinance 89 JJ, to add a new section 84 which states the following: The Building Inspection Department shall withhold issuance of Building Permits if the use of the property does not conform to the terms set forth in this Ordinance and, where made applicable by the terms set forth in any other specified Weld County Ordinance, including, but not limited to, Ordinance No. 197 (PUD), Ordinance No. 191 (MUD), Ordinance No. 119 (Subdivision), Ordinance No. 210 (WINDSOR SERVICE AREA ROAD IMPACT FEE PROGRAM)and Ordinance No. 211 (SOUTHWEST WELD SERVICE AREA ROAD IMPACT FEE PROGRAM). 2. An amendment to Section 31.5.5 and 36.3.12 which states: No BUILDING or STRUCTURE classed R or above in the Uniform Building Code shall be constructed within a 350 150 foot radius of any OIL AND GAS PRODUCTION FACILITIES. Any construction of a structure classed R or above in the Uniform Building Code within a 350150 foot radius of OIL AND GAS PRODUCTION FACILITIES shall require a variance from the terms of this Ordinance in accordance with Section 61.3 3. An amendment to Section 61.3 which states. The Board of Adjustment has the power to hear and decide appeals for variance from the terms of the Ordinance and the PUD Ordinance or MUD design standards as the PUD or MUD Ordinances are applied to individual lots or parcels. Appeals for variance may be brought to the Board of Adjustment when, because of special conditions relating to the subject land, a literal enforcement of these Ordinances would result in unnecessary hardship to the appellant. The Planning Commission has determined the inclusion of the attached language satisfies section 22.3.2.1- 22.3.2.3 of the Weld County Zoning Ordinance 22.3.2.1 That the existing Ordinance is in need of revision as proposed. 22.3.2.2 That the proposed amendment will be consistent with the future goals and needs of the COUNTY as set out in the Weld County Comprehensive Plan 22.3.2.3 That the proposed amendment will be consistent with the overall intent of the Weld County Zoning Ordinance Motion seconded by Arlan Mars. RESOLUTION 89KK Page 2 VOTE: For Passage Against Passage Absent Cristie Nickles Jack Epple Arlan Marrs Stephen Mokray John Folsom Fred Walker Bruce Fitzgerald Michael Miller Bryant Gimlin The Vice Chair declared the resolution passed and ordered that a certified copy be forwarded with the file of this case to the Board of County Commissioner's for further proceedings. CERTIFICATION OF COPY I, Trisha Swanson, Recording Secretary for the Weld County Planning Commission, do hereby certify that the above and foregoing resolution, is a true copy of the resolution of the Planning Commission of Weld County, Colorado, adopted on November 16, 1999. Dated the 16th of November, 1999. 4 ci -1/1L-TCAAA.A0 C4 Trisha Swanson Secretary From: <KWonstolen@aol.com> To: <charding@co.weld.co.us> Date: 11/12/99 3:02pm Subject: Weld County Ordinance#89-KK The Colorado Oil & Gas Association submits the following comments for the case file in this matter: 1. A 150' radius does not preserve an adequate area around a wellhead to allow for reasonable access and use of the surface to conduct workover, frac'ing, refrac'ing or plugging and abandonment operations. A 200' radius is the minimum distance to preserve adequate space to safely and efficiently conduct such operations, including, of course, an adequate access corridor to the wellsite. 150' may be adequate for separation of structures from tank batteries and separators from a workspace standpoint, although 200' would be preferable from a safety buffer perspective and would result in a consistent setback rule. 2. The Colorado Oil and Gas Conservation Commission's "high density area" rule (603.b) provides for a 350' setback from occupied structures for new wells constructed in designated areas. This additional setback beyond the safety buffer otherwise justified by the rulemaking record was a concession by industry. COGA believes that should Weld County adopt a lesser setback for encroaching high density surface development, it would provide grounds for operators seeking a variance from the COGCC high density setback for wells in Weld County. It is COGA's understanding, however, that individual encroaching high density subdivision/PUD applicants could (and should) be required to adhere to a 350' setback as a condition of approval. COGA requests that this be made clear in the hearing record on the proposed amendment. Thank you for your consideration of these comments. Contact: Ken Wonstolen, Senior Vice President & General Counsel 303.861.0362 CC: <dsiple@patinaoil.com>, <rich.griebling@state.co.u... From: "David Siple" <DSIPLE@patinaoil.com> To: <charding@co.weld.co.us> Date: 11/16/99 12:02pm Subject: Weld County Ordinance# 89-KK Patina Oil & Gas Corporation submits the following comments for the case file in this matter: 1. A 150' radius does not preserve an adequate area around a wellhead to allow for reasonable access and use of the surface to conduct workover, recompletion, deepening or plugging and abandonment operations. A 200' radius is the minimum distance to preserve adequate space to safely and efficiently conduct such operations, including, of course, an adequate access corridor to the wellsite. 150' may be adequate for separation of structures from production facilities from a work space standpoint, although 200' would be preferable from a safety buffer perspective and would result in a consistent setback ordinance. Thank you for your consideration of these comments. David W. Siple, Vice President Land, 303-389-3668 From: BRUCE BARKER To: CHARDING, EGESICK Subject: Change to Proposed Section 84 Lee had a minor change to our new proposed Section 84 to the Zoning Ordinance which makes it read better. Also, Dave Sprague sent me an e-mail saying that Ordinance 119 is the Building Code Ordinance, rather than Subdivision. So I corrected that andadded both. Finally, Monica suggested we need a title, so its on there too. Even though the notice didn't have these in there, I think we can ask the Board to modify when it considers November 17, 1999. See the attached. Bruce. CC: NORTHDOMAIN.NORTHPOST.MMIKA, LMORRISON 84 Relationship to Other Ordinances The Building Inspection Department shall withhold issuance of Building Permits if the use of the property does not conform to the terms set forth in this Ordinance and whcrc madc applicablc by the tc_m. forth n any other specified Weld County Ordinance where made applicable by the terms set forth in the specified Ordinance; including,but not limited to,Ordinance No. 197(PUD), Ordinance No. 191 (MUD), Ordinance No. 119 (BUILDING CODE), Ordinance No. 173 (SUBDIVISION), Ordinance No. 210 (WINDSOR SERVICE AREA ROAD IMPACT FEE PROGRAM),and Ordinance No. 211 (SOUTHWEST WELD SERVICE AREA ROAD IMPACT FEE PROGRAM). Oil and Gas issue: Ken Wonstolen submitted the following comments via e-mail to the Clerk to the Board: The Colorado Oil& Gas Association submits the following comments for the case file in this matter: 1. A 150'radius does not preserve an adequate area around a wellhead to allow for reasonable access and use of the surface to conduct workover, frac'ing, refracting or plugging and abandonment operations. A 200'radius is the minimum distance to preserve adequate space to safely and efficiently conduct such operations, including, of course, an adequate access corridor to the wellsite. 150'may be adequate for separation of structures from tank batteries and separators from a workspace standpoint, although 200'would be preferable from a safety buffer perspective and would result in a consistent setback rule. 2. The Colorado Oil and Gas Conservation Commission's "high density area" rule (603.b)provides for a 350'setback from occupied structures for new wells constructed in designated areas. This additional setback beyond the safety buffer otherwise justified by the rulemaking record was a concession by industry. COGA believes that should Weld County adopt a lesser setback for encroaching high density surface development, it would provide grounds for operators seeking a variance from the COGCC high density setback for wells in Weld County. It is COCA's understanding, however, that individual encroaching high density subdivision/PIID applicants could(and.should) be required to adhere to a 350'setback as a condition of approval. COGA requests that this be made clear in the hearing record on the proposed amendment. Thank you for your consideration of these comments. Contact: Ken Wonstolen, Senior Vice President& General Counsel 303.861.0362 Wonstolen also indicated to me that he wanted to make sure that greater setbacks would not be precluded in a new PUD or subdivision since these would be minimums. 1 advised him that I thought that if greater setbacks were needed to accommodate the oil and gas development , the County would not be precluded from requiring greater setbacks in a final plan. (but it may be appropriate to add language that says these are minimums and that new PUD, RE, or Subdivision plats may require greater setbacks).. EX1i1BIT Bob Burroughs submitted the attached comments suggesting changes to the proposed amendment. He represents Realtors who are concerned that the 150' is still too restrictive as to structures not used for human habitation. He suggests 20 ` for non-occupied structures U,((u"u)615 Co' ro w iv, S BUILDING: Any STRUCTURE excluding fences, erected for shelter or enclosure of persons, animals or personal property of any kind. STRUCTURE: Anything that is built, constructed or erected, an edifiace of building of any kind, or any piece of work artifically built up or composed of parts joined together in some definite manner, but not including fences or walls used as fences less than six (6) feet in height, poles, lines, cables or distribution facilities of public utilities. Semi-trailers as defined in §42-1-102(70), C.R.S., situated as TEMPORARY or permanent storage units, not safe or not operable or illegal to be used on public road rights of way, which are not licensed, shall be considered 'STRUCTURES' in accordance with this definition, shall comply with requirements set forth in this Ordinance, including required zoning SETBACKS and OFFSETS, and shall be installed in accordance with the requirements set forth in the Weld County Building Code Ordinance. OIL AND GAS PRODUCTION FACILITIES: Consist of the oil or gas well, pumps, heater, treaters, separators, meters, compressors, TANK BATTERY and other equipment directly associated with the producing well, all of which must be connected, functional and in operation. An amendment to Sections 31.5.5 and 36.3.12 of Weld County Ordinance #89-II, the Weld County Zoning Ordinance, to state as follows: No BUILDING or STRUCTURE shall be constructed within a 150 foot radius of any above ground OIL AND GAS PRODUCTION FACILITIES. Any construction within a 150 foot radius of any above ground OIL AND GAS PRODUCTION FACILITIES shall require a variance from the terms of the Ordinance in accordance with Section 61.3. The 150 foot radius restriction shall only apply to a BUILDING or STRUCTURE which is erected for shelter or enclosure of persons, and shall not apply to a BUILDING OR STRUCTURE erected for enclosure of animals or personal property. The radius restriction for a BUILDING or STRUCTURE erected for any purpose other than enclosure of persons shall be 20 feet. COGCC Regs SAFETY REGULATIONS 601. INTRODUCTION The rules and regulations in this section are promulgated to protect the health, safety and welfare of the general public during the drilling, completion and operation of oil and gas wells and producing facilities. They do not apply to parties or requirements regulated under the Federal Occupational Safety and Health Act of 1970 (See Rule 212.). 602. GENERAL The training and action of employees, as well as proper location and operation of equipment is an important part of any safety program. While this section is general in nature, it is considered a basic part of the foundation of any safety program. a. Employees shall be familiarized with these rules and regulations as provided herein as they relate to their function in their respective jobs. Each new employee should have their job outlined, explained and demonstrated. b. Unsafe and potentially dangerous conditions as defined by these rules, should be reported immediately by employees to the supervisor in charge and shall be remedied as soon as practical. Any accident involving injury to wellsite personnel or to a member of the general public which requires hospitalization, or significant damage to equipment or the wellsite shall be reported to the Oil and Gas Conservation Commission as soon as practicable, but in no event later than twenty-four (24) hours after the accident. Where unsafe or potentially dangerous conditions exist, the owner or operator shall respond as directed by an agency with demonstrated authority to do so (such as sheriff, fire district director, etc.). c. Vehicles of persons not involved in drilling, production, servicing, or seismic operations shall be located a minimum distance of one hundred (100) feet from the wellbore, or a distance equal to the height of the derrick or mast, whichever is greater. Equivalent safety measures shall be taken where terrain, location or other conditions do not permit this minimum distance requirements. d. Existing wells are exempt from the provisions of these regulations as they relate to the location of the well. e. Existing producing facilities shall be exempt from the provisions of these regulations with respect to minimum distance requirements and setbacks unless they are found by the Director to be unsafe. f Self-contained sanitary facilities shall be provided during drilling operations and at any other similarly staffed oil and gas operations facility. 603. DRILLING AND WELL SERVICING OPERATIONS AND HIGH DENSITY AREA RULES a..Star��+,de setbacks-In:all arers:af.the.stateercept those prflvitled for:it -sub}x�ragraph b kielow t£ie 1611.6 it g dealt apply:: {3).At the time of inmal drdlmg of thewell the wellhead shall be located a dastance of one hundred fifty:(1-50)feet or.one:arid one.half(1 .I1?j times.the height:of the:dernck, whiche��er;cs greater, from'az�y occupied build}rsga public goad major above ground:gutty 1me or ri�lydad : (Z�:A well:stza#1 be a m"sitmufn distance Qf:one hundred ft£ty(15t}):r'eet Ervin a surface property line;::An e�cept3otr,may:be granted by the Director if it;iS trot #easIb#e for:the eperator.to meet.this, mciiiauin distance requirement aiid a vvai es fs obtained-From fhe o9sef:surface iiwner(s) Art �xcepUori request deter stattt>ggih�reasons:-FQt.the exce�stsott.shal#be sibsnitted ro ttie lirector aiid:aeeompaiaied by.a;signed. asver(sJ triizn tlie.olFset- urlaee ovu{s) ,Such waiver:"shalt written and #il.ed m the:county clerk and recc+rder's.of£ce and:vvrth the Drreetor::: b. High density area rules. A high density area shall be determined at the time the well is permitted on a well-by-well basis by calculating the number of occupied building units within the seventy-two(72)acre area defined by a one thousand (1000) foot radius from the wellhead or production facility.If thirty-six (36)or more actual or platted building units (as defined in the 100 Series rules) are within the one thousand (1000) foot radius or eighteen (18) or more building units are within any semi-circle of the one thousand (1000) foot radius(i.e., an average density of one (1) building unit per two(2) acres), it shall be deemed a high density area. If platted building units are used to determine the density, then fifty percent (50%) of said platted units shall have building units under construction or constructed. If an educational facility, assembly building, hospital, nursing home, board and care facility,:or jail is located within one thousand (1000)feet of a wellhead or production facility, it shall be considered a high density area. If a designated outside activity area is within one thousand (1000) feet of a wellhead or production facility the area may become high density upon application and determination by the COGCC and shall include a determination of the appropriate boundary for setback application,The following rules shall apply in high density areas: (1)Provisions for encroaching development Il by virtue of subsequent future surface development, an area becomes a high density area, subparagraphs (2), (3), (7) and (14) shall not apply to the operator. . . .. . ... ............... ......... ......... .... (2) Setbacks for wellheads. At the time of initial drilling of the well, the wellhead location shall be not less than three hundred fifty (350) feet from any building unit, educational facility, assembly building, hospital, nursing home, board and care facility, or)ail,- (3) Setbacks for production equipment At,the time of initial installation, production tanks and/or associated on-site production equipment shalt be located not less than three hundred fifty (350) feet from any building unit, and, if requested by the local governmental designee, production tanks shall be located five hundred (500) feet from an educational facility,assembly building, hospital, nursing home,:board and care facility or jail. However, such five hundred:(500) foot setback shall be decreased to the maximum achievable setback if five hundred (50(i) feet would extend beyond the area on which the operator has a legal right to place or construct such facilities Should the operator abject to such five hundred(500) foot setback for any reason, a variance hearing shall be conducted at the next regularly scheduled meeting of the Commission, subject to the notice requirements of Rule 507; (4) A. Blowout preventer equipment ("BOPE") for high density area drilling operations. Blowout prevention equipment for drilling operations shall consist of(at a minimum): i. Rig with kelley double ram with blind ram and pipe ram; • annular preventer or a rotating head ii. Rig without kelley double ram with blind ram and pipe ram Mineral Management certification or Director approved training for blowout prevention shall be required for at least one (1) person at the wellsite during drilling operations. B. BOPE testing for high density area drilling operations. Upon initial rig-up and at least once every thirty (30) days during drilling operations thereafter, pressure testing of the casing string and each component of the blowout prevention equipment shall be performed to seventy percent (70%) of working pressure or seventy percent (70%) of the internal yield of casing, whichever is less. Pressure testing shall be conducted and the documented results shall be retained by the operator for inspection by the Director for a period of one (1) year. In addition, flange connections shall be tested on each rig-up, and blowout prevention equipment shall be tested whenever the pipe ram has been activated. C. Pit level indicators. Pit level indicators shall be used. D. Drill stem tests. Closed chamber drill stem tests shall be allowed in high density areas. All other drill stem tests shall require approval by the Director. manner. (I I) Guy line anchors. All guy line anchors left buried for future use shall be identified by a marker of bright color not less than four (4) feet in height and not greater than one (1) foot east of the guy line anchor. (12) Berm construction. All newly installed or replaced berms in high density areas, in the absence of remote impounding, shall be constructed around crude oil and condensate storage tanks and shall enclose an area sufficient to contain one hundred fifty percent (150%) of the largest single tank. No more than two (2) crude oil and condensate storage tanks shall be located within a single berm. Berms shall be inspected at regular intervals and containment integrity maintained. Refer to American Petroleum Institute Recommended Practices - D16. (13) Tank specifications. All newly installed or replaced crude oil and condensate storage tanks in high density areas shall be designed, constructed, and maintained in accordance with National Fire Protection Association's latest edition (NFPA 30). The operator shall maintain writtej► records verifying proper design, construction, and maintenance, and shall make these records available for inspection by the Director. (14) Access roads. If a wellsite falls within a high density area at the time of construction, all leasehold roads shall be constructed to accommodate local emergency vehicle access requirements, and shall be maintained in a reasonable condition. (15) Well site cleared. Within ninety (90) days after a well is plugged and abandoned, the well site shall be cleared of all non-essential equipment, trash, and debris. For good cause shown, an extension of time may be granted by the Director. (I6) Identification of plugged and abandoned wells in high density areas. The operator shall identify the location of the wellbore with a permanent monument as specified in Rule 319.a.(5). The operator shall also inscribe or imbed the well number and date of plugging upon the permanent monument. (17) Development from existing well pads. Where possible, operators shall provide for the development of multiple reservoirs by drilling on existing pads or by multiple completions or commingling in existing wellbores (see Rule 322.). If any operator asserts it is not possible to comply with, or requests relief from, this requirement, the matter shall be set for hearing by the Commission and relief granted as appropriate. c. Statewide rig floor safety valve requirements. When drilling or well servicing operations are in progress on a well where there is any indication the well will flow hydrocarbons, either through prior records or present conditions, there shall be on the rig floor a safety valve with connections suitable for use with each size and type of tool joint or coupling being used on the job. d. Statewide static charge requirements. Rig substructure, derrick, or mast shall be designed and operated to prevent accumulation of static charge. e. Statewide well servicing pressure check requirements. Prior to initiating well servicing operations, the well shall be checked for pressure and steps taken to remove pressure or operate safely under pressure before commencing operations. f Statewide well control equipment and other safety requirements. Well control equipment and other safety requirements are: (1) When there is any indication that a well will flow, either through prior records, present well conditions, or the planned well work, blowout prevention equipment shall be installed in accordance with Rule 317. or any special orders of the Commission. (2) Blowout prevention equipment when required by Rule 317. shall be in accordance with API RP 53: Recommended Practices for Blowout Prevention Equipment Systems, or amendments thereto. (3) While in service, blowout prevention equipment shall be inspected daily and a preventer operating test shall be performed on each round trip, but not more than once every twenty-four (24) hour period. Notation of operating tests shall be made on the daily report. (4) All pipe fittings, valves and unions placed on or connected with blowout prevention equipment, well casing, casinghead, drill pipe, or tubing shall have a working pressure rating suitable for the maximum anticipated surface pressure and shall be in good working condition as per generally accepted industry standards. (5) Blowout prevention equipment shall contain pipe rams to enable closure on the pipe being used. The choke line(s) and kill line(s) shall be anchored, tied or otherwise secured to prevent whipping resulting from pressure surges. (6) Pressure testing of the casing string and each component of the blowout prevention equipment, if blowout prevention equipment is required, shall be conducted prior to drilling out any string of casing except conductor pipe. The minimum test pressure shall be five hundred (500) psi, and shall hold for fifteen (15) minutes without pressure loss in order for the casing string to be considered serviceable. Upon demand the operator shall provide to the Commission the pressure test evidence. Drilling operations shall not proceed until blowout prevention equipment is tested and found to be serviceable. (7) If the blind rams are closed for any purpose except operational testing, the valves on the choke lines or relief lines below the blind rams should be opened prior to opening the rams to bleed off any pressure. (8) All rig employees shall have adequate understanding of and be able to operate the blowout prevention equipment system. New employees shall be trained in the operations of blowout prevention equipment system as soon as practicable to do so. (9) Drilling contractors shall place a sign or marker at the point of intersection of the public road and rig access road. (10) The number of the public road to be used in accessing the rig along with all necessary emergency numbers shall be posted in a conspicuous place on the drilling rig. g. Statewide equipment, weeds, waste, and trash requirements. All locations, including wells and surface production facilities, shall be kept free of the following: equipment, vehicles, and supplies not necessary for use on that lease; weeds; rubbish, and other waste material. The burning or burial of such material on the premises may be subject to other applicable laws. In addition, material may be burned or buried on the premises only with the prior written consent of the surface owner. h. Statewide equipment anchoring requirements. All equipment at drilling and production sites in geological hazard and floodplain areas shall be anchored to the extent necessary to resist flotation, collapse, lateral movement or subsidence. 604. PRODUCTION FACILITIES a. Crude Oil Tanks. (1) Atmospheric tanks used for crude oil storage shall be built in accordance with the following standards as applicable: A. Underwriters Laboratories, Inc., No. UL-142, "Standard for Steel Above Ground Tanks for Flammable and Combustible Liquids" B. American Petroleum Institute Standard No. 650, "Welded Steel Tanks for Oil Storage" C. American Petroleum Institute Standard No. 12B, "Bolted Tanks for Storage of Production Liquids" D. American Petroleum Institute Standard No. 12D, "Field Welded Tanks for Storage of Production Liquids" or E. American Petroleum Institute Standard No. 12F, "Shop Welded Tanks for Storage of Production Liquids". -Tanks:tha#ll#z:#naateii:at:#eect:ivkci: 2 s&airie€ars nr:tl�r :nianti l:€ 3:y:= O�:F # ............... i��a£ler �fi�xsiit�t�..kx�ltclfl�.o#:ti�.prcrpe:-I}.Qt�.-�#txe#x st.xs i�w#t.:5�1s�s�.t1�e fltz?p�s:t�.�ste.za.a easement. A. Tanks less than three thousand (3,000) barrels capacity shall be located at least three (3) feet apart. B. Tanks three thousand (3,000) or more barrels capacity shall be located at least one-sixth (1/6) the sum of the diameters apart. When the diameter of one (1) tank is less than one-half(1/2) the diameter of the adjacent tank, the tanks shall be located at least one-half(1/2) the diameter of the smaller tank apart. ....ii:;�sesl'cll�e�cas :ararr�;3y�peezt�i�ac#' .�xnk£iflgs ��:eve.�Idefiriei��riacnia3ly=bccFrpuecl:�oa�l®:;asieaS� (4) Berms shall be constructed around tanks in the absence of remote impounding. Both methods shall enclose an area with sufficient volume to contain the entire contents of the largest tank in the enclosure. Berms shall be inspected at regular intervals and maintained in good condition. When a berm is provided around tanks no potential ignition sources shall be installed inside that area. (5) Tanks shall be a minimum of seventy-five (75) feet from a fired vessel or heater-treater. (6) Tanks shall be a minimum of fifty (50) feet from a separator, well test unit or other non-fired equipment. (7) Tanks shall be a minimum of seventy-five (75) feet from a compressor with a rating of two hundred (200) horsepower, or more. (8) Tanks shall be a minimum of seventy-five (75) feet from a wellhead. (9) Gauge hatches on atmospheric tanks used for crude oil storage shall be closed at all times when not in use. (10) Vent lines from individual tanks shall be joined and ultimate discharge shall be directed away from the loading racks and fired vessels in accord with API RP 12R-1. (1 1) During hot oil treatments on tanks containing thirty-five (35) degree or higher API gravity oil, hot oil units shall be located a minimum of one hundred (100) feet from any tank being serviced. b. Fired Vessel, Heater-Treater. (1) Fired vessels (FV)including heater-treaters (HT) shall be minimum of fifty (50) feet from separators or well test units. (2) FV-HT shall be a minimum of fifty (50) feet from a lease automatic custody transfer unit (LACT). (3) FV-HT shall be a minimum of forty (40) feet from a pump. (4) FV-HT shall be a minimum of seventy-five (75) feet from a well. (5) At the time of installation, FV-HT shall be a minimum of two hundred (200) feet from residences occupied buildings, or well defined normally occupied outside areas. (6) Vents on pressure safety devices shall terminate in a manner so as not to endanger the public or adjoining facilities. They shall be designed so as to be clear and free of debris and water at all times. c. Special Equipment. Under unusual circumstances special equipment may be required to protect public safety. The Director shall determine if such equipment should be employed to protect public safety and if so, require the operator to employ same. If the operator or the affected party does not concur with the action taken, the Director shall bring the matter before the Commission at public hearing. (1) All wells located within one hundred fifty (150) feet of a residence(s), normally occupied buildings, or well defined normally occupied outside area(s), shall be equipped with an automatic control valve that will shut the well in when a sudden change of pressure, either a rise or drop, occurs. Automatic control valves shall be designed so they fail safe. (2) Pressure control valves required in subparagraph a. shall be activated by a secondary gas source supply, and shall be inspected at least every three (3) months to assure they are in good working order and the secondary gas supply has volume and pressure sufficient to activate the control valve. (3) All pumps, pits, and producing facilities shall be adequately fenced to prevent access by unauthorized persons when the producing site or equipment is easily accessible to the public and poses a physical or health hazard. (4) Sign(s) shall be posted at the boundary of the producing site where access exists, identifying the operator, lease name, location, and listing a phone number, including area code, where the operator may be reached at all times unless emergency numbers have been furnished to the county commission or it's designee. d. Mechanical Conditions. All valves, pipes and fittings shall be securely fastened, inspected at regular intervals and maintained in good mechanical condition. e. Buried or partially buried tanks, vessels or structures. Buried or partially buried tanks, vessels, or structures used for storage of E&P waste shall be properly designed, constructed and installed in a manner to contain materials safely. Such vessels shall be tested for leaks after installation and maintained, repaired or replaced to prevent spills or releases of E&P waste. 605. SEISMIC OPERATIONS a All explosives will be legally and safely stored and accounted for in magazines when not in use in accord with the Alcohol, Tobacco and Firearms Division of the Federal Department of the Treasury. h. Blasting shall be kept a safe distance from an occupied building, well or spring, unless by special written permission of the surface owner or lessee, according to the following minimum distances: Up to 2 lbs. charge 200 feet 2 to 5 lbs. charge 300 feet 5 to 10 lbs. charge 600 feet 10 to 20 lbs. charge 1000 feet over 21 lbs. charge 1320 feet c. Unstable soils within road right-of-ways shall be avoided when in a saturated condition. d. All shot holes shall be preplugged or anchored to prevent public access if not immediately shot. 606A, FIRE PREVENTION AND PROTECTION a. Gasoline-fueled engines shall be shut down during fueling operations if the fuel tank is an integral part of the engine. b. Handling, connecting and transfer operations involving liquefied petroleum gas (LPG) shall conform to the requirements of the State Oil Inspector. c. Flammable liquids storage areas within any building or shed shall: (1) Be adequately vented to the outside air; (2) Have two (2) unobstructed exits leading from the building in different directions if the building is in excess of five hundred (500) square feet. (3) Be maintained with due regard to fire potential with respect to housekeeping and materials storage; (4) Be identified as a hazard and appropriate warning signs posted; d. Flammable liquids shall not be stored within fifty (50) feet of the wellbore, except for the fuel in the tanks of operating equipment or supply for injection pumps. Where terrain and location configuration do not permit maintaining this distance, equivalent safety measures should be taken. e. Liquefied petroleum gas (LPG) tanks larger than two hundred fifty (250) gallons and used for heating purposes, shall be placed as far as practical from and parallel to the adjacent side of the rig or wellbore as terrain and location configuration permit. Installation shall be consistent with provisions of NFPA 58, "Standards for the Storage and Handling of Liquid Petroleum Gases". f Smoking shall be prohibited at or in the vicinity of operations which constitute a fire hazard and such locations shall be conspicuously posted with a sign, "No Smoking" or "Open Flame". Matches and all smoking equipment may not be carried into "No Smoking" areas. g. No source of ignition shall be permitted in an area where smoking has been prohibited unless it is first determined to be safe to do so by the supervisor in charge or the designated representative. h. Open fires, transformers, or other sources of ignition shall be permitted only in designated areas located at a safe distance from the wellhead or flammable liquid storage areas. i. Only approved heaters for Class I Division 2 areas, as designated by API RB 500B, shall be permitted on or near the rig floor. The safety features of these heaters shall not be altered. j. Combustible materials such as oily rags and waste shall be stored in covered metal containers. k. Material used for cleaning shall have a flash point of not less than one hundred degrees Fahrenheit (100°F). For limited special purposes, a lower flash point cleaner may be used when it is specifically required and should be handled with extreme care. I. Firefighting equipment shall not be tampered with and shall not be removed for other than fire protection and firefighting purposes and services. A firefighting water system may be used for wash down and other utility purposes so long as its firefighting capability is not compromised. After use, water systems must be properly drained or properly protected from freezing. m. An adequate amount of fire extinguishers and other firefighting equipment shall be suitably located, readily accessible, and plainly labeled as to their type and method of operation. n. Fire protection equipment shall be periodically inspected and maintained in good operating condition at all times. o. Firefighting equipment shall be readily available near all welding operations. When welding, cutting or other hot work is performed in locations where other than a minor fire might develop, a person shall be designated as a fire watch. The area surrounding the work shall be inspected at least one (1) hour after the hot work is completed. p. Portable fire extinguishers shall be tagged showing the date of last inspection, maintenance or recharge. Inspection and maintenance procedures shall comply with the latest edition of the National Fire Protection Association's publication NFPA 10. q. Personnel shall be familiarized with the location of fire control equipment such as drilling fluid guns, water hoses and fire extinguishers and trained in the use of such equipment. They shall also be familiar with the procedure for requesting emergency assistance as terrain and location configuration permit. Installation shall be consistent with provisions of NFPA 58, "Standards for the Storage and Handling of Liquefied Petroleum Gases". 606B. AIR AND GAS DRILLING a. Drilling compressors (air or gas) shall be located at least one hundred twenty five (125) feet from the wellbore and in a direction away from the air or gas discharge line. b. The air or gas discharge line shall be laid in as nearly as a straight line as possible from the wellbore and be a minimum of one hundred fifty (150) feet in length. The line shall be securely anchored. c. A pilot flame shall be maintained at the end of the air or gas discharge line at all times when air, gas, mist drilling, or well testing is in progress. d. All combustible material shall be kept at least one hundred (100) feet away from the air and gas discharge line and burn pit. e. The air line from the compressors to the standpipe shall be of adequate strength to withstand at least the maximum discharge pressure of the compressors used, and shall be checked daily for any evidence of damage or weakness. f Smoking shall not be allowed within seventy-five (75) feet of the air and gas discharge line and burn pit. g. All operations associated with the drilling, completion or production of a well shall be subject to the Colorado Air Quality Control Act, §25-7-101, C.R.S. 607. HYDROGEN SULFIDE GAS a. When well servicing operations take place in zones known to contain at or above one hundred (100) ppm hydrogen sulfide gas, as measured in the gas stream, the operator shall file a hydrogen sulfide drilling operations plan (United States Department of the Interior, Bureau of Land Management, Onshore Order No. 6, November 23, 1990). b. When proposing to drill a well in areas where hydrogen sulfide gas in excess of one hundred (100) ppm can reasonably be expected to be encountered, the operator shall submit as part of the Application for Permit to Drill, Form 2, a hydrogen sulfide drilling operations plan (United States Department of the Interior, Bureau of Land Management, Onshore Order No. 6, November 23, 1990). c. Any gas analysis indicating the presence of hydrogen sulfide gas shall be reported to the Commission and the local governmental designee. Previous Series: 500, Rules of Practice and Procedure. Next Series: 700, Financal Assurance and Environmental Response Fund Lee thoughts- Structure in WCZO currently encompasses: STRUCTURE: Anything that is built, constructed, or erected, an edifice or building of any kind, or any piece of work artificially built up or composed of parts joined together in some definite manner, but not including fences or walls used as fences less than six (6) feet in height, poles, lines, cables or distribution facilities of public utilities. Semi-trailers as defined in §42-1-102(70), CRS, situated as TEMPORARY or permanent storage units, not safe or not operable or illegal to be used on public road rights of way, which are not licensed, shall be considered 'STRUCTURES ' in accordance with this definition, shall comply with requirements set forth in this Ordinance, including required zoning SETBACKS and OFFSETS, and shall be installed in accordance with the requirements set forth in the Weld County Building Code Ordinance. BUILDING: Any STRUCTURE excluding fences, erected for shelter or enclosure of persons, animals, or personal property of any kind. There is not a definition in WCZO which defines the concept of building occupied by humans. There is a concept in the 1SDS regulations of: "live , work or congregate" as structures which require septic but they also use the term dwelling or occupied structure. This is tempered by the ability to use toilet facilities if within 200' of the dwelling or occupied structure. The UBC breaks down uses and it may work to use group and division classifications. All Groups except S and U and ag exempt might work. the OGCC provides (definition section in their rules): "BUILDING UNIT shall mean a building or structure intended for human occupancy. A dwelling unit is equal to one (1) building unit, every guest room in a hotel/motel is equal to one (1) building unit, and every five thousand (5,000) square feet of building floor area in commercial facilities, and every fifteen thousand (15,000) square feet of building floor area in warehouses, or other similar storage facilities, is equal to one (1) building unit". The main purpose of this definition is to calculate whether an area is high density or not and does not define human occupancy. I agree that Burroughs point that "structure" is too broad and that oil and gas production facility is too broad as well. I think excluding underground oil and gas production is OK as long as wells are not excluded unless properly abandoned. I do not agree that 20' is ever adequate since there is an access problem to the wellhead created by such a rule. Burroughs indicates the problem is mostly found with tanks on adjoining property. The OGCC requires tanks to be at least 2 '/z times the diameter or 350' from a surface property line so I am not sure this is a real issue. 31 2.6,3-A 1994 UNIFORM BUILDING CODE • 312.6 Agricultural Buildings. Where applicable(see Section 101.3) for agricultural buildings, see Appendix Chapter 3. , `' TABLE 3-A—DESCRIPTION OF OCCUPANCIES BY GROUP AND DIVISION1 --- I GROUP ANA j DESCRIPTION OF OCCUPANCY DIVISION• SECTION .•if.••,i A building or portion of a building having an assembly room with an occupant Y'' A 1 load of 1,000 or more and a legitimate stage. • of t'•' �` t'�'1. A building or portion of a building having an assembly room with an occupant ,.,• . . A-2 Q', load of less than 1,000 and a legitimate stage. •'' .A building or portion of a building having an assembly room with an occupant .i: ?_ A 2.l I I load of 300 or more without a legitimate stage,including such buildings used for I 303.1.1 educational purposes and not classed as a Group E or Group B Occupancy. �,., .' with an ill,l A-3 Any building or portion of a building having an assembly y room buildingsoccupant for load of less than 300 without a legitimate stag •including n lu inGrguup B Ocildings used• i educational purposes and not classed as a Group E or.�p., ;m3 Stadiums,reviewing stands and amusement park structures not included within I+! •"" I A 4 other Group A Occupancies. ily i° 4�!•; A building or structure,or a portion thereof,for office,professional or service-type ,ji"'• •i B storage of records and accounts:eating and drinking ;,I:•.i I 304.1 transactins,including j!l"i .establishments with an occupant load of less than 50. t I,r E-1 j Any building used for educational purposes through the 12th grade by 50 or more ,•'.. persons for more than 12 hours per week or four hours in any one day. !�'�I�;=; ,Any building used for educational put •sea through the 12th omrie dade y less than 50 `tiC;.:'.;, E 2 , 3as.1 persons for more than 12 hours per week or four hours in any y tt�' : Any building or portion thereof used for day-care purposes for more than six t;t;lq;;.t E 3 persons. and industrial sW..!.l:�' factory t'"i,;' I F-1 1 Moderate-hazard and industrial occupanciieesinclude factory { �� I uses not classified as Group F,Division 2 Occupancies. Ib.". { .I'ii;.IIlt F 2 306.1 • F1Jow-hazard factory and industrial occupancies include facilities producing • til noncombustible or nonexplosive materials which during finishing,packing or processing do not involve a significant fire hazard. '''.1',,r '. Occupancies with a quantity of material in the building in excess of those listed in H-1 I Table 3-D which present a high explosion hazard as listed in Section 307.1.1. i;: ;. i` H_2 Occupancies with a quantity of material in the building in excess of those listed in Table 3-D which present a moderate explosion hazard or a hazard from accelerated it'... : as listed in Section 307.1.1. 1 307.1 quantity of material in the building in excess of those listed in • i.l!•,,:: Occupancies with a q sical hazard as listed in Section 307.1.1. I Table 3 D which present a high fire or physical garages not classified as Group S,Division 3 Occupancies. I 1,• H� Repair and ! ,i.y!,':I'� H-5 Aircraft repair hangars not classified as Group S.Division_Occupancies �' I heliports. • .I..':,,-it H-6 307.1 an Semiconductor the facilities in which hazardous production ties and comparable materia s are development used,and the ' 1 ''!3 307.11 aggregate quantity of material is in excess of those listed in Table 3-D or 3-E.3-E 'II "� 1 ,r '. g. Occupancies having quarttities of materials in excess of those listed in: li-7 307.1 II�1 that are health hazards as listed in Section 307.1.1. l cl; W!! '1; I� 1-5B '1 •?5 LI 1994 UNIFORM BUILDING CODE 3-A TABLE 3-A--DESCRIPTION OF OCCUPANCIES BY GROUP AND DIVISION1--(Continued) GROUP AND- • DIVISION SECTION DESCRIPTION OF OCCUPANCY 1 1.1 Nurseries for the frill-time care of children under the age of six(each accommodating more than five children),hospitals,sanitariums,nursing homes with nonambulatory patients and similar buildings(each accommodating more than five patients). 1-1.2 Health-care centers for ambulatory patients receiving outpatient medical care 308.1 which may render the patient incapable of unassisted self-preservation(each tenant I space accommodating more than five such patients). 1-2 Nursing homes for ambulatory patients,homes for children six years of age or over (each accommodating more than five persons). 1-3 Mental hospitals.mental sanitariums,jails,prisons,reformatories and buildings where personal liberties of inmates are similarly restrained. M I A building or structure.or a portion thereof,for the.display and sale of 309.1 merchandise,and involving stocks of goods.wares or merchandise,incidental to such purposes and accessible to the public. R-I Hotels and apartment houses,congregate residences(each accommodating more than 10 persons). 310.1 R-3 Dwellings,lodging houses.congregate residences(each accommodating 10 or fewer persons). S-I I Moderate hazard storage occupancies including buildings or portions of buildings used for storage of combustible materials not classified as Group S.Division 2 or Group H Occupancies. S-2 Low-hazard storage occupancies including buildings or portions of buildings used for storage of noncombustible materials. 311.1 S-3 I Repair garages where work is limited to exchange of parts and maintenance not requiring open flame or welding,and parking garages not classified as Group S, Division 4 Occupancies. S-4 Open parking garages. S S I Aircraft hangars and helistops. U-1 Private garages,carports,sheds and agricultural buildings.312.1 1 U-2 f Fences over 6 feet(1829 mm)high,tanks and towers. • 'For detailed descriptions,see the occupancy definitions in the noted sections. • 1-59 STATEMENT OF THE COLORADO OIL& GAS ASSOCIATION NOVEMBER 16, 1999 RE: AN AMENDMENT TO SECTIONS 31.5.5 AND 36.3.12 OF WELD COUNTY ORDINANCE#89-JJ,THE WELDCOUNTY ZONING ORDINANCE COCA has submitted electronic comments in this matter regarding its concerns that the proposal to reduce the setback for buildings and structures from existing oil and gas facilities to 150': (1) does not provide sufficient working space consistent with mineral owners' right of reasonable use; and(2) is inconsistent with the COGCC Rule 603(b)"high density area" setback standards. CODA submits these additional written comments for the hearing record. The Colorado Oil &Gas Conservation Commission conducted statewide rulemaking on safety regulations on June 24, 1996. Among the issues examined was the appropriate setback from oil and gas production facilities. Evidence was placed into the hearing record that: (1) The Housing& Urban Development Administration safety standard for siting projects near "hazardous facilities" requires a setback for possible exposure to persons of 180' (2) A study conducting by EQE International for the American Petroleum Institute(Jan. 1995) examined the safety margins associated with both radiant heat and blast overpressure effects from the explosion of various hydrocarbons at different pressures. This study indicates that for a wellhead blowout of a wet gas stream at 1000 psi, the distance to the hazard endpoint is 190'. This pressure is somewhat higher than a typical DJ Basin well, and the presence of produced water in the gas stream will also reduce the hazard radius. However, it is appropriate to establish safety margins on the basis of a"worst case scenario". Anecdotal reports placed into the COGCC hearing record also indicated that tank explosions had resulted in metal fragments being ejected 200' or more. (Note that when new production facilities are placed in proximity to "high density areas"they must be at least 350' away from occupied structures and must be designed to fail at the wall-to-ceiling seam so that metal fragments are not ejected.) Accordingly, COCA believes that a 200' minimum setback distance from oil and gas production facilities is necessary from a public health, safety and welfare standpoint. Colorado Oil & Gas Association EXHIBIT 1776 Lincoln Street, Suite 1008 1� Denver, Colorado 80203 d] 303-661-0362/303-661-0373 [FAX) oRD A` COGA SUGGESTED AMENDMENT NO RESIDENTIAL BUILDING, SCHOOL, DAYCARE CENTER, CHURCH, HOSPITAL,JAIL, MEETING HALL OR OTHER PLACE OF ASSEMBLY SHALL BE CONSTRUCTED WITHIN TWO-HUNDRED FEET OF THE ABOVE- GROUND PORTION OF AN OIL AND GAS PRODUCTION FACILITY, EXCEPT BY VARIANCE GRANTED PURSUANT TO THIS ORDINANCE. OTIS, COAN & STEWART, LLC ATTORNEYS AT LAW Fred L.Otis West Greeley Law Center DENVER METRO G.Brent Coan 1812 56TH AVENUE (303)659-7576 Michael D. Stewart GREELEY,COLORADO 80634 FAX (970)330-6700 (970)330-2969 E-MAIL OCS300@aol.com File No. BOARD OF COUNTY COMMISSIONERS November 17, 1999 Ordinance No. 89-KK 1. Set back should be from a "well" as defined in the Rules and Regulations of the COGCC. a. Not a set back from an "Oil and Gas Production Facility" as defined in the Weld County Zoning Ordinance. 2. "Building or Structure" should be further defined and limited. a. Weld County Zoning Ordinance defines a structure as: "Anything that is built, constructed or created..." b. Could be interpreted as covering things that are built such as: roads, ditches/canals, silage pits, parking lots, driveways, sewer lines, signs, etc. c. Limit definition to occupancies A through R in Table 3-A of the Uniform Building Code. 3. Changes should be applicable to the Residential Zones also. a. Amend after published Notice. b. If no change to distance, at least clarify definitions and applicability. c. Consider PUD overlay district. 4. Amend Sections 31.5.5 and 36.3.12 to read as follows: a. No BUILDING or STRUCTURE shall be constructed within a 150 foot radius of any oil and gas well as defined below. Any construction of a BUILDING or STRUCTURE within a 150 foot radius of an oil and gas well shall require a variance from the terms of this Ordinance in accordance with Section 61.3. b. Oil and gas well as used in this section shall mean a hole drilled for the purpose of producing oil or gas, a well into which fluids are injected, a stratigraphic well, a gas storage well, or a well used for the purpose of monitoring or observing a reservoir. c. A BUILDING or STRUCTURE as used in this section only shall mean and refer to.... EXHIBIT S1Wp80\OBC\Ordinance 6n 'laws. \ � . TABLE 3-A 1997 UNIFORM BUILDING CODE TABLE 3-A-DESCRIPTION OF OCCUPANCIES BY GROUP AND DIVISI0N1 r GROUP AND SECTION DESCRIPTION OF OCCUPANCY __ DIVISION r_—A-1 A building or portion of a building having an assembly mom with an occupant load of 1,000 or more and a legitimate stage. — r A-2 A building or portion of a building having an assembly room with an occupant load of less than 1,000 and a legitimate stage. — Ir—A-2 1 A building or portion of a building having an assembly room with an occupant load of 300 or more without a 303.1.1 legitimate stage,including such buildings used for educational purposes and not classed as a Group E or Group B Occupancy. _ -- r A-3 Any building or portion of a building having an assembly room with an occupant load of less than 300 without a legitimate stage,including such buildings used for educational purposes and not classed as a Group E or Group B k9ccupancy. -- -. — _ A-4 Stadiums,reviewing stands and amusement park structures not included within other Group A Occupancies. — B A building or structure,or a portion thereof,for office,professional or service-type transactions,including storage of 3041 records and accounts;eating and drinking establishments with an occupant load of less than 50. E-1 • Any building used for educational purposes through the 12th grade by 50 or more persons for more than 12 hours per week or four hours in any one day. E-2 • 305.1 Any building used for educational purposes through the 12th grade by less than 50 persons for more than 12 hours , - per week or four hours in any one day. _ —I E-3 Any building or portion thereof used for day-care purposes for more than six persons. I -1 F-I Moderate-hazard factory and industrial occupancies include factory and industrial uses not classified as Group$ • Division 2 Occupancies. — - 306.1 F-2 Low-hazard factory and industrial occupancies include facilities producing noncombustible or nonexplosive materials that during finishing,packing or processing do not involve a significant fire hazard. __,— H-1 Occupancies with a quantity of material in the building in excess of those listed in Table 3-D that present a high explosion hazard as listed in Section 307.1.1. li r H-2 Occupancies with a quantity of material in the building in excess of those listed in Table 3-D that present a moderate explosion hazard or a hazard from accelerated burning as listed in Section 307.1.1. — — C 307.1 Occupancies with a quantity of material in the building in excess of those listed in Table 3-D that present a high fire H-3 I J. ' or physical hazard as listed in Section 307.1.1. _ L— H-4 ll Repair garages not classified as Group S,Division 3 Occupancies. --..— H-5 Aircraft repair hangars not classified as Group S,Division 9 Occupancies and heliports. H-6 307.1 Semiconductor fabrication facilities and comparable research and development areas when the facilities in which and hazardous production materials are used,and the aggregate quantity of material is in excess of those listed in Table I • 307.11 3-D or 3-E. _ Irr Occupancies having quantities of ma[enals in excess of those listed in Table 3-E that are health hazards as listed in H-7 307.] Section 307.1.1. _- �, 1-1.1 Nurseries for the full-time care of children under the age of six(each accommodating more than five children). hospitals,sanitariums,nursing homes with nonambulatory patients and similar buildings(each accommodating more than five patients). ------ 1-1 2 Health-care centers for ambulatory patients receiving outpatient medical care which may render the patient 308.1 incapable of unassisted self-preservation(each tenant space accommodating more than five such patients). 1-2 Nursing homes for ambulatory patients,homes for children six years of age or over(each accommodating more than i five persons). — _— — — — 1-3 I Mental hospitals,mental sanitariums,jails,prisons,reformatories and buildings where personal liberties of inmates are similarly restrained. --- -- —'-7 M A building or structure,or a portion thereof,for the display and sale of merchandise,and involving stocks of goods, 309.1 wares or merchandise,incidental to such purposes and accessible to the public. R-1 Hotels and apartment houses,congregate residences(each accommodating more than 10 persons). — I 310.1 Dwellings,lodging houses,congregate residences(each accommodating 10 or fewer persons) R-3 S-1 � Moderate hazard storage occupancies including buildings or portions of buildings used for storage of combustible materials not classified as Group S,Division 2 or Group H Occupancies. S-2 Low-hazard storage occupancies including buildings or portions of buildings used for storage of noncombustible materials. - — — — — -— —J 311.1 I - --- r S-3 Repair garages where work is limited to exchange of parts and maintenance not requiring open flame or welding. and parking garages not classified as Group S,Division 4 Occupancies. S-4 Open parking garages. — — — S-5 i Aircraft hangars and helistops. ---- — — _ -- U 1 Private garages,carports,sheds and agricultural buildings. —_ - — • 312.1 Fences over 6 feet(1829 mm)high,tanks and towers. lFor detailed descriptions,see the occupancy definitions in the noted sections. 1-33 >;Y Hello