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HomeMy WebLinkAboutORD 1973-005 ORDIP�ANCE N0. 73-5 REGULATING THE DISCNARGE OF IfdDUSTRIAL WASTES INTO THE SAPJITARY SEWERS OF TNE CITY OF GRAPEVIPJE, TEXAS, ESTABLISFIIPJG A PERTIIT SYSTEi�, ESTABLISHIPdG A SYSTEM OF CHARGES FOR SERVICES RENDERED, REGULATING U��SEI°JERED A(�D MISCELLANEOUS DISCHARGES, AND PROVIDIPdG FOR ENFORCEMENT. � t-dHEREAS, the City of Grapevine has provided facilities for the collection � and treatment of wastewater to promote the health, safety, and convenience of its people and for the safeguarding of tivater resources common to all , and � WHEREAS, provision has been made in the design, construction and operation of such facilities to accommodate certain types and quantities of industrial wastes in addition to normal wastewater, and �JHEREAS, it is the obligation of the producers of industrial waste to defray the costs of the was�tewater treatment services rendered by the City of Grapevine in an equitable manner and, insofar as it is practicable, in pro- portion to benefits derived, and �dHEREAS, protection of the quality of the eifluent and proper operation of the wastewater collection and treatment facilities and quality of effluent may require either the exclusion, pretreatment, or controlled discharge at point of origin of certain types or quantities of industrial wastes; iJ0U1, THEREFORE BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF GRAPEVINE TEXAS: SECTION 1 . DEFIPdITIO�dS. As used in this ordinance �°~� (1 ) "APPRUVIPdG AUTHORITY" means the City Manager or his duly authorized representative; (2) "B.O.D. " (Biochemical Oxygen Uemand) means the quantity of � oxygen by tiveig{�t, expressed in mg/l ,� utilized in the biochemical oxidation of organic matter under standard laboratory conditions for five (5) days at a temperature o� twe�i�ty (20) degrees centigrade; (3) "BUILDING SEWEP." means the extension from the building drain to the �ublic se��ter or other place of disposal (also called house lateral and house connection) ; (4) "CITY" means the City of Grapevine, Texas , or any authorized person acting in its behalf; (5) "C.O.D. " (Chemical Oxygen Demand) means r�easure of the oxygen consuming capacity of inorganic and organic matter present in the water or �vaste�Nater expressed in mg/7 as the amount of oxygen consumed from a chemical oxidant in a specific test, but not differen�Liating between stable and un- stable organic matter and thus not necessarily correlating with biochemical oxygen der�and; (�) "CONTROL 'riAfdHOLE" means a manhole giving access to a building se�-der at some point before the building sewer discharge mixes with other discharges in the public sev�er; (7) "COPdTROL POI�JT" means a poin� of access to a course of dis- charge before the discharge mixes with other discharges in the pub7ic sewer; (8) "GARBAGE" means animal and vegetable wastes and residue from preparation, cooking, and dispensing of food; and �rom the handling, pro- �, cessing, storage and sale of food products and produce; _ (9) "IiJDUSTRIAL WASTE" means waste resulting from any process of � industry, manufacturing, trade, or business from the development of any f natural resource, or any mixture o� the waste with water or normal waste- � water, or distinct from normal wastewater; (10) "INDUSTRIAL 4�ASTE SURCHARGE" means the charge made on those persons who discharge industrial wastes into the Ci�y's sewerage system in addition to the published changes �or Normal Dor�es�ic Wastewater; (11 ) "�9ILLIGRA�1S PER LITER" (mg/1 ) means the same as parts per million and is a weight-to-volume ratio; the milligram-per-liter value multiplied by the factor 8.34 shall be equivalent to pounds per million gallons of water; 1 . . (12) "N�TURAL OUTLET" means any outlet into a watercourse, ditch, lake, or other body of surface water or groundwater; (13) "�dORP1AL D�f�IESTIC IJASTEtdATER" means wastewater excluding industrial waste�vater discharged by a person into saritary sewers and in which the average concentration of total suspended solids is not more than 200 mg/1 and BOD is not more than 200 mg/1 ; (14) "OVERLOAD" means the imposition of organic or hy draulic loading on a treatment faci7ity in excess of its enqineered design capacity; (15) "PERSOid" includes corporation, organization, government or governmenta7 subdivision or agency, business trust, estate, trust, partner- � ship association, and any other legal entity; (16) "pti" means the reciprocal of the logarithr� (base 10) of � the hydrogen ion concentration expressed in grams per liter; (17) "PUBLIC SE�dER" means pipe or conduit carrying wastewater or unpolluted drainage in which owners of abutting properties shall have the use, subject to control by the City of Grapevine; (18) "SAf•lITARY SEU!ER" means a public sewer that conveys domestic wastewater or industrial �vastes or a combination of both , and into which storn water, surface �vater, groundwater, and otYier unpolluted wastes are not intentiona7ly passed; (19) "SLUG" means any discharge of water, wastewater, or in- dustria7 v�aste which in concentration of any given constituent or in quantity of f7ow, exceeds for any period of duration longer than fifteen (15) minutes more than five (5) times the average twenty-four (24) hour concentration or f7ows during normal operation; (20) "STANDARD METHOUS" means the examina�ion and analytical procedures set rorth in the 7atest edition, at the time of analysis, of "Standard P�ethods for the Examination of Water and Wastewater" as prepared, approved, and pub7ished join-tly by the American Public Health Association, the Ameri can l�daLer l�Jorks Associ ati on, and the l�dater Pol l uti on Control Federati on; (27 ) "STORi� SEWER" means a public sewer which carries storm and surface waters and drainage and into which domestic wastewater or industrial �-- wastes are not intentionally passed; (22) "STORP� LJATER" means rai nfal l or any other forms of pre- cipitation; � (23) "SUPERINTEtJDE�JT" mea�ns the LJater and �dastewater Superi ntendent of the City of Grapevine or his duly authorized deputy, agent, or repre- sentative; (24) "SUSPEPdDED SOLIDS" means solids measured in mg/1 that either f7oat on the surface of, or are in suspension in, water, wastewater, or other liquids, and which are largely removable by a laboratory filtration device; (25) "TO DISCHARGE" includes to deposit, conduct, drain, emit, throw, run, allow to seep, or otherwise release or dispose of, or to allow, permi t, or s urfe r any of thes� ac�:s or omi ss i ons ; (26) "TRAP" means a device designed to skim, settle, or otherwise remove grease, oil , sand, flammable v�astes or other harmfu7 substances ; (27) "U�IPOLLUTED tdASTEGJATER" means water containing (A) no free or emulsified grease or oil ; (B) no acids or alkalis ; (C) no phenols or other substances producing taste or odor in receiving water; (D) no toxic or poisonous substances in suspension, colloidal state, or solution; (E) no noxious or otherwise obnoxious or odorous gases ; (F) not more than ten (10) mg/1 each of suspended solids and � B.O.D. ; and (G) color not exceeding fifty (50) units as measured by the Platinum-Cobolt method of determination as specified in Standard Methods; �, (28) "lAlASTE" means rejected, unutilized or superfluous substances �„ in 7iquid, gaseous, or solid form resulting from domestic, agricultural , or industria7 activities; (29) "6�dASTEI>lATER" means a combination of the water-carried waste from residences, business buildings, insti�Lutions , and industrial establish- ments, together with any ground, surface, and storm water that may be presen�; (30) "WASTEWATER FACILITIES" includes all facilities for collection, pumping, treating, and disposing of wastewater and industrial �vastes; 2. (31 ) "GlASTEWATER TREATMENT PLA(dT" means any City-owned facilities, devices , and structures used for receiving, processing and treating waste- water, industrial �vaste, and sludges from the sanitary sewers ; (32) "WASTEWATER SERVICE ChiARGE" means the charge on all users of the public sewer system l�rhose wastes do not exceed in strength the con- centration values established as representative of normal wastewater; and (33) "WATERCOURSE" means a natural or man-made channel in which a flow of water occurs , either continuously or intermittently. SECTIOPd 2. PROHIBITED DISCNARGES. (a) No person may discharge to public se�vers any waste which by itself or by interaction with other wastes may � (1 ) injure or interfere with wastewater treatment processes � or facilities; �,,, (2) constitute a hazard to humans or animals; or (3) create a hazard in receiving waters_ of the wastewater treatr�ent plant eff7uent. (b) All discharges shall conform to requirements of this ordinance. SECTION 3. CHEf�1ICAL DISCFIARGES. (a) No discharge to public sewers may contain: (1 ) cyanide grea�er than 2.0 mg/1 ; (2) fluoride other than that contained in the public water supply; (3) chlorides in concentrations greater than 250 mg/1 ; (4) gasoline, benzene, naphtha, fuel oil , or other flammable or explosive liquid, solid or gas ; or (5) substances causing an excessive Chemical Oxygen Demand (C.O.D. ) (b) Pdo waste or waste�r�ater discharged to public waters may contain: (1 ) strong acid, iron pickling wastes, or concentrated plating solutions whether neutra7ized or not; (2) fats, wax, grease or oils, whether emulsified or not, in excess of one hundred (100) mg/1 or containing substances which may solidify or become viscous at temperatures between thirty-two (32) and one hundred �'`" fifty (750) degrees Fahrenheit (0 and 65° Centigrade). (3) objec�tionable or toxic substances , exerting an excessive ch7orine requirement, to such degree. that any such material received in the � composite tvastewater a� the t�►aste�•�ater trea'tment works exceeds the limits estab7ished by the Approving Authority for such materials; or (4) obnoxious , toxic, or poisonous solids , liquids , or gases in quantities sufficient to violate the provisions of Section 2 (a). (c) fdo waste, wastewater, or other substance may be discharged into public setivers which has a pH lo�•aer than 5.5 or higher t�an 9.5, or any other corrosive proper�y capable of causing dan�age or hazard to structures , equi prnent, and personnel at �he Ufaste�,�ater faci 1 i ti es. (d) All tivaste, v�as-tewater, or other substance containing phenols, hydrogen sulfide, or other taste-and-odor producing substances , shall conform to concentration liniii.s established by the Approving Authority. After treat- ment of the composite vaastewa�er, concentration limits may not exceed the requirements established by state, federal , or other agencies with juris- diction over discharges to receiving waters . SECIIUN 4. HEAVY P�ETALS APJD TOXIC MATERIALS. (a) No discharges may contain concentrations of heavy metals greater than amounts specified in subsection (b) of this section. (b) The maximum allowable concentrations of heavy metals stated in terms of milligrams per liter (mg/1 ) , determined on the basis of individual sampling in accordar�ce with "Standard P�ethods" are: �• (1 ) Arsenic 0.05 mg/1 ; � (2) Barium 5.0 mg/1 ; (3) Boron 1 .0 mg/1 ; � (4) Cadmium 0.02 mg/1 ; � (5) Chromium (Total } 5.0 mg/1 ; (6) Copper 1 .0 mg/1 ; (7) Lead 0.1 mg/1 ; (8) P�anganese 1 .0 mg/1 ; (9) P-1ercury 0.005 mg/1 ; (10) f•Jickel 1 .0 mg/1 ; (11 ) Selenium 0.02 mg/1 ; (12) Silver 0.1 mg/1 ; (13) Zinc 5.0 mg/1 ; 3. (c) fdo other heavy metals or toxic materials may be discha�ged into public sewers without a permit from the Approving Authority specifying conditions of pretreatment, concentrations , volumes , and other applicable provisions. (d) Prohibited heavy me�a7s and toxic materials include but are not 7imited to: (1 ) Antimony, (2) Qery7lium, (3) Bismuth , (4) Cobalt, � (5) P�olybdenum, (6) Tin, �, (7) Uranyl ion, (8) Rhenium, (9) Strontium, (10) Tellurium, (11 ) Herbicides , (12) Fungicides , and (13) Pesticides . SECTION 5. GARBAGE. (a) P�o person may discharge garbage into public sewers unless it is shredded to a degree that all particles can be carried freely under the flow conditions normally prevailing in pub7ic sewers. Particles greater than one-ha7f (1/2) inch in any dimension are prohibited. (b) The Approving Authority is entitled to review and approve the installation and operation oi any garbage grinder equipped with a motor of three-fourths (3/4) horsepower (0.76 hp metric) or greater. SECTION 6. STORM 4�JATER AND OTHER UPJPOLLUTED DRAIflAGE. (a) �o person may discharge to public sanitary sewers (1 ) unpolluted storm water, surface water, groundwater, roof runoff or subsurface drainage; (2) unpolluted cooling tivater; �M (3) unpolluted industrial process waters; or (4) other unpolluted drainage. (b) In compliance with the Texas 4Jater Quality Act and other �� statutes , the Approving Authority may designate storm sev�ers and other water- courses into which unpolluted drainage described in subsection (a) of this section may be discharged. SECTIOfd 7. TE�IPERATURE. �!o person may discharge liquid or vapor having a temperature higher than one hundred fifty (150) degrees Fahrenheit (65° Centigrade) , or any substance which causes the temperature of the total wastewater treatment plant influent to increase at a rate of ten (10) degrees Fahrenheit or more per hour, or a combined total increase of plant influent temperature to one hundred ten (110) degrees Fahrenheit. SECTIOfd 8. RADIOACTIVE WASTES. (a) P!o person may discharge radio- active e�astes or isotopes into public sewers without the permission of the Approving Authority. (b) The Approving Authority may establish, in compliance with applicable state and federal regulations , regulations for discharge of radioactive wastes into public sewers . . SECTION 9. IMPAIRMEIJT OF FACILITIES. (a) Pdo person may discharge into public sewers any substance capable of causing (1 ) obstruction to the flow in sewers ; �, (2) interference with the opPration of treatment processes ; of facilities; or (3) excessive loading of treatment facilities. (b) Discharges prohibited by Section 9 (a) include, but are not � limited to materials which exert or cause concentrations of (1 ) inert suspended solids greater than 250 mg/1 including but not limited to (A) Fuller's earth (Q) lime slurries; and (C) lime residues; 4. (2) dissolved solids greater than 1 ,000 mg/1 including but not limited to (A) sodium ch7oride; and (B) sodium sulfate; (3) excessive discoloration including but not limited to (A) dye wastes; and (B) vegetable tanning solutions, or (4) BOD, COD, or chlorine demand in excess of normal plant capacity. �** (c) No person may discharge into public sewers any substance � that may (1 ) deposit grease or oil in the sewer lines in such a manner � as to c7og the sewers; (2) overload skimming and grease handling equipment; (3) pass to the receiving waters without being effectively treated by normal ��astewater treatment processes due to the nonamenability of the� substance to bacterial action; or (4) deleteriously affect the treatment process due to ex- cessive quantities. (d) fJo person may discharge any substance into public se���ers which (1) is not amenable to treatment or reduction by the processes and facilities employed; or (2) is amenable to treatment only to such a degree that the treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters. (e) The Approving Au�hority shall regulate the flow and con- centration of slugs vrhen they may (1 ) impair the treatment process; (2) cause damage to collection facilities; (3) incur treatment costs exceeding those for normal waste- �vater; or (4) render the waste unfit for stream disposal or industrial use. �� (f) �Jo person may di s charge i nto publ i c sewers sol i d or vi s cous ; substances which may violate subsection (a) of this section if present in sufficient quantity or size including but not limited to � (1 ) ashes ; � (2) cinders ; (3) sand; (4) mud; (5) straw; (6) shavings; (7) metal ; (8) glass; (9) rags; (10) feathers ; (11 ) tar; (12) plastics; (13) wood; (14) unground garbage; (15) whole blood; (16) paunch manure; (17) hair and fleshings ; (18) entrails; (19) paper products , either whole or ground by garbage grinders; (20) slops ; (21 ) chemical residues ; �, (22) paint residues ; or � (23) bulk solids . SECTIOiJ 10. COMPLIAi`�CE �JITH EXISTING AUTHORITY. (a) Unless exception �• is granted by the Approving Authority, the public sewer system shall be used by a71 persons discharging: (1 ) waste��aater; (2) industrial waste; (3) polluted liquids ; or (4) unpollu�ted waters or liquids. 5. (b) Unless authorized by the Texas 4Jater Quality Board, no person may deposit or discharge any waste included in subsection (a) of this section on public or private property in or adjacent to any: (1 ) natural outlet; (2) v�atercourse; (3) storm sewer; (4) other area within the jurisdiction of the City. (c) The Approving Authority shall verify prior to discharge that wastes authorized to be discharged will receive suitable treatment within �•, the provisions of laws, regulations , ordinances , rules and orders of federal , � state and local governments . � SECTION 11 . APPROVIPJG AUTfiORITY REQUIREMEPdTS . (a) If discharges or proposed discharges to public sewers may (1 ) deleteriously affect wastewater facilities , processes , equipment, or receiving waters; (2) create a hazard to life or health; or (3) create a public nuisance; the Approving Authority shall require (A) pretreatment to an acceptable condition for discharge to the public sewers; (B) control over the quantities and rates of discharge; and (C) payment to cover the cost of handling and treating the wastes. (b) The Approving Authority is entitled to determine whether a dis- charge or proposed discharge is included under subsection (a) of this section. (c) The Approving Authority shall reject wastes v�hen (1 ) it determines that a discharge or proposed discharge is inc7uded under subsection (a) of this section; and (2) the discharger does not meet the requirements of subsection (a) of this section. SECTIOi�I 12. APPROVING AUTI�ORITY REVIEtJ AND APPROVAL. (a) If pretreat- �� ment or control is required, the Approving Authority shall review and approve w design and installation of equipment and processes . (b) The design and installation of equipment and processes must „�„�,;:,,... conforri to al l appl i cabl e statutes , �codes , ordi nances and other 1 aws . (c) Any person responsible for discharges requiring pretreatment, flow-equalizing, or other facilities shall provide and maintain the facilities in effective operating condition at his own expense. SECTIOPJ 13. REQUIREP�ENTS FOR TRAPS. (a) Discharges requiring a trap include (1 ) clrease or waste containing grease in excessive amounts; (2) oil ; (3) sand; (4) �lammable wastes; and (5) other harmfu7 ingredients. (b) Any person responsible for discharges requiring a trap shall at his own expense and as required by the Approving Authority (1 ) provide equipment and facilities of a type and capacity approved by the Approving Authori�y; (2) locate the trap in a manner that provides ready and easy accessibility for cleaning and inspection; and (3) maintain the trap in effective operating condition. SECTIOTd 14. REQUIREP�ENTS FOR BUILDIPdG SEWERS. Any person responsible � for discharges through a building set�ver carrying industrial wastes shall , at his own expense and as required by the Approving Authority �` (1 ) install an accessible and sa-fely located control manhole; (2) install meters and other appurtenances to facilitate observation sampling and measurement of the waste; and (3) maintain the equipment and facilities. SECTIOf� 15. SAMPLIPJG AND TESTI1dG. (a) Sampling shall be conducted according to cus�omarily accepted methods, reflecting the effect of con- stituents upon the sewage works and determining the exZstence of hazards to health, 7ife, limb, and property. 6. (rJOTE: The particu1ar analyses involved will determine whether a twenty- four (24) haur composite sample from all outfal1s of a premise is apprapria�e or whether a grab sample or sa�ples shou3d be taken. Norrrally, but not always, BOD and suspended solids analyses are obtained fram 24-hour composites of a11 outfalls, �dhere applicab7e, 16-hour, 8-hour or some ather period may be required. Periodic grab samples are used to determine pN. ) (b) Examination and ana7yses of the characteristics of waters and wastes required by this ordinance sha11 be (1 ) conducted in accordance with the latest edition of +�"° "Standard P9ethods"; and (2) determined from suitable samples taken at the cantral manhole provided ar ather control point authorized by the Approving Authority. �, (c) BOD and suspended solids shall be determined from composite sampling. (d) The City may select an independent firm or labaratary to determine flova, B.O.D. , and suspended so7ids. (e} 1'he City is entitled to select the time of sampling at its sole discretion so lang as at least annual samples are taken. SECTION 16. PAYMEPJT AND AGREEh1EPJT REQUIRED, (a) Persons making dis- charc�es of industrial waste sha11 pay a charge to cove r the cost of col3ection and treatment. (b} 1�Jhen discharges a-f industrial waste are appraved by the Approving Authority, the City or its authorized representative shall enter into an agreement or arrangement providing (1 ) �erms of accep�ance by the City; and (2) paymen� by the persan making the discharge. SECTION 17. IPdDUSTRIAL 6JASTE CHARGE �P�1D ADDED COSTS. {a} If the valume or character af the �raste to be treated by the City does nat cause over1oading the sewage collectian, treatment, or disposal faci]ities of the City, then prior to approval , the City and the person making the discharge shall enter into an agreement which provides that the discharger � pay an industria1 4��aste surcharge to be de�termined from the schedule of charges . {b} If the volun�e or charac�er of the waste to be treated by the Ci ty requi res tf�a� �A�astewater col l ecti on, �reatment, or ather di sposal faci 1 i ti es �,, af the City be improved, expanded, or enlarged in arder �o treat the waste, then prior to approval , the Gity and the person making the discharge shall en�er into an agreement which provides �hat the discharger pay in full al1 added cos�ts the City may incur due to acceptance of the waste. ' (c� The agreement entered into pursuant to subsection (a) of this section sha11 inc7ud� but no� be lir�ited to (1 ) amortization of all capital outlay for col1ecting and treating the Gvaste, including neUr capita3 outlay and the propartionate part of the value of the exis�ing system used in handling and trea�ing the waste; {2) opera�ior� and �ain�enance costs including salaries and wages, power costs, costs of chemicals and supplies, proper a1lowances for maintenance, depreciation, overnead, and office expense; and (d) Amor�izatian sha11 be compieted in a 2Q-year period and payment sha77 inc7ude a17 debt service costs. SECTIOP� 18. SCNEDULE OF CHARGES. The surcharge for the discharging of industrial waste inta the sanitary sewer sha11 be computed in accardance with formula se� forth be1ow. The surcharge will be in addition ta the published charges fot^ �3orr�al Donesti c 6lastewater. Ci = Vi [Y (BOD-24Q) + Z (S.S.-240] �„ 1000 �Jhere Ci = Surcharge in dollars per month Vi � Voi . of wasi,ewater, IQ00 gal . per month � Y = 0.0423 x 8.34 = $0.3745/mg/1 �w�. Z = 0.0229 x 8.34 = $Q.29111�9/� 5ECTION 19. ADJUSTMEfdT OF CNARGES. (a� 1'he City shall adjust charges at least annually ta reflect chan�es in the characteristics of wastewater based on the results of sampling and testing. �b} Increases in charges sha11 be re�roactive far �wo billing periods and sha11 continue for six (6) bil1ing periads unless subsequent tests determine that the charge sizauld 6e further increased. 7. , (c} The City shali review at leas� annual1y the basis for deter- mining charges and shall adjust the uni�t treatment cost in the formula to reflect increases or decreases in wastewater treatment casts based on �he previous year's experience. (d} The City shall bili the discharg�r by the month and sha11 show industrial waste surcharges as a separate item an the regular bill for water and sewer charges, The discharger sha17 pay manthly in accat~dance with practices existing far payment of sewer charges . �"' SECTION 20. SAVI�dGS CLAUSE. A person discharging indus�rial was�es � into public sewers prior to the effective date of this ordinance may continue � withaut penalty so lang as he ir� (1 ) does nat increase the quantity or quality of discharge, without pern�ission of the Approving Autharity; � (2} has discharged the industrial waste at least two months prior to the effective date of this ordinance; and (3) applies for and is granted a permit no later than 180 days after the effec�Give date af this ardinance. , SECTION 21 . COPdDITTONS OF PERMITS. (a) The City may grant a permit ta discharge to persons meeting a11 requirements �f the savings c2ause pro- vided that the person (7 } sub�nit an application within �64 days after the effective date of' this ordinance on forms supplied by the Approving Au�hority; (2) secure approva7 by the Approving Authority af plans and speci fi cati ons �or pretreatrnent faci i i ti es N�hen requi red; and (3) has complied with a11 requirements for agreements or arrangements including, but not limited ta, provisians far (A) payment of charges ; {B} ir�stal3atian and aperatian of pretreatment facilities; and (C) samp7ing and analysis ta determine quantity and ��.. strength; and (4) provides a sampling point subject to the provis7ons af this ordinance and approval af the Approving Authority, ' (b) A person applying for a new discharge shall ��,.* (1 } meet a11 C011{�'1�'iO�iS af subsec�ion �a} of this section; and (2) secure a permi� priar to discharging any waste. SECTIOfd 22. POWER TO EfdTER PROPERTY. (a) The Superintendent and other duly authori zed er�pi ayees of the Ci ty beari ng proper credenti al s and i denti- fication are en�itled to enter any pubiic ar private property at any reasonable time far tne �urpose of enforcing this ordinance. tb} Anyone aeting under this authority shall abserve the establish- ment's rules and regulations concerning safety, internal security, and fire protec�ion. (c) Except �,�hen caused by negligence or failure o�' the company to r�aintain safe conditions, the City shall indemnify the cor�pany against lass or damage to i�s pro}�erty by City employees and against iiability ciaims and demands for persc�nal injury or praperty damage asserted against the company and growin out of the sampling operatian. �{d) 7he Superintendent and other duly au�Ghorized employees of the City bearing praper credentia3s and identification are entitled ta enter a11 priva�e properties through �vhich the City halds a negotiated easement for the purpases o�' (1 ) inspection, observation, measurement, sampling, or repair; {2� maintenance of any portion of the sewerage system lying �* within the easements; and (3) conducting any other authorized activity. All activities � shall be eanducted in fu11 accordance with the terms of the t�egotiated ease- � ment pertaining to �he private property invalved. '�' (e} Pdo persan acting under authority of this provision may inquire into any processes including metallurgical , ch�mical , oil refining, ceramic, paper, or other industries beyond that paint having a direct bearing on the kind and source of discharge to the public sewers. SECTIOP� 23. AUTNORTTY 70 DISCOiJPJECT SERVICE, {a} The City may terminate water and wastewater disposal service and disconnect an industrial customer from the system when 8. (1 ) acids or chemicals dar�aging to sewer lines or treatment process are released to the sewer causing rapid deterioration of these structures or interfering with proper conveyance and treatment of wastewater; (2) a governmental agency informs the City that the effluent from the wastewater treatment plant is no longer of a quality permitted for discharge to a watercourse, and it is found that the customer is delivering wastewater to the City's system that cannot be sufficiently treated or re- : quires treatment that is not provided by the City as norma7 domestic treat- �„ ment; or (3) the industrial custo�er � (A) discharges industrial waste or wastewater that is in � violation of the permit issued by the Approving Autnority; (B) discharges wastewater at an uncontrolled, variable rate in sufficient quantity to cause an imbalance in the wastewater treat- ment system; (C) fails to pay month7y bills for water and sanitary sewer services when due; or (D) repeats a discharge of prohibited wastes to public sewers . (b) If service is disconnected pursuant to subsection (a) (2) of this section, the City shall (1 ) disconnect the customer; � (2) supply the customer with the governmental agency 's report and provide the customer with all pertinent information; and (3) continue disconnection until such time as the industrial customer provides additional pretreatment or other facilities designed to remove the qbjectionable characteristics from his industrial wastes. SECTION 24. i�dOTICE. The City shall serve persons discharging in violation of this ordinance with written notice stating the nature of the violation and providing a reasonable time limit for satisfactory compliance. �,,,, SECTION 25. CONTINUING PROHIBITED DISCHARGES. No person may continue discharging in violation of this ordinance beyond the time limi� provided � in the notice. �"' SECTIOfd 26. PEiVALTY. (a) A person v�ho continues prohibited discharges is guilty of a misdemeanor and upon conviction is punishable by a fine of not more than $200 for each act of violation and for each day of violation. (b) In addition to proceeding under authority of subsection (a) of this section, the City is entitled to pursue all other criminal and civil remedies to v�hich it is entitled under authori�ty of s�atutes or other ordi- nances against a person con�inuing prohibited discharges . SECTIOid 27. FAILURE TO PAY. In addition to sanctions provided for by this ordinance, the City is entitled to exercise sanctions provided for by the other ordinances of the City for failure to pay the bill for water and sanitary sewer service when due. SECTION 28. SEVERABILITY. If any provision of this Ordinance or the application thereof to any person or circumstance is held invalid, such in- validity shall not affect other provisions or applications of the Ordinance which can be given effect without the invalid provision or application, and to this end the provisions of this Ordinance are declared to be severable. SECTION 29. EFFECTIVE DATE. This Ordinance shall be in full force and effect from and after its passage, approval , recording , and publication as "�""� provi ded by 1 aw. _ � PASSED AND APPROVED ON THE 6th Day of Feb:r��.ary , 19 73 . �rr.. ATTEST: CITY OF GRAPEVIfJE, TEXAS � ' - `._ i r . ., . By � ��� C. W. Vandeventer, City Secretary Willis Pirkle, Mayor VED A RM: � �/ 9. John Boyle, City Atto ey GRAPEVINE, TEXAS IiVDUSTRIAL WASTE SURCHARGE DATA l . Capital Costs (dorthside Plant Cost $548,600 Southside Plant Cost 93,300 � Total Cost $641 ,900 "��i Less Federal Grant 211 ,800 7 �..� Net Cost to City $430,100 Uniform Annual Payment based on 6% Interest for 20 Years = 430,100 x .087 $37,420 Debt Service Coverage Factor x 1 .5 Total Annua7 Capital Cost $56,130 Estimated Annual Operation and Maintenance Cost for 1973 25,000 Total Annual Treatment Cost �81 ,130 2. Allocated Costs Capital 0 & M Total Allocation Cost Allocation Cost Vo7ume 40% $22,452 25% $ 6,250 $28,702 BOD 45% 25,259 35% 8,750 34,009 � , S.S. 15% 8,419 40% 10,000 18,419 Totals $56,130 $25,000 $81 ,130 �.>..�: 3. Allocation of Unit Costs Based on plant design capacity of 1 .7 MGD for capital costs, present 0&M costs, and 240 mg/1 each of QOD and S.S. Annual Loading Treatment Cost Combined Design Present Unit Capital Unit 0&M Unit Capaci�y Flows Cost Cost Cost Volume 620.5 P�G 213.5 MG �36.18/��IG $29.27/MG $65.45/MG BOD 1 ,241 ,993 Lb. 356,118 Lb. 0.0203/Lb. .0246/Lb. .0449/Lb. S.S. 7 ,241 ,993 Lb. 356,118 Lb. 0.0068/Lb. .0281/Lb. .0349/Lb. 4. Industrial Waste Surcharge Formula for BOD & S.S. Concentration above 240: Ci = Vi [Y (BOD-240) + Z (S.S.-240)] 1000 bdhere Ci = Surcharge i n Uo71 ars per P�onth Vi = Vol . of Wastewater, 1000 gal . per month � Y = 0.0449 x 8.34 = $0.3745/mg/1 Z = 0.0349 x 8.34 = $0.2911/ng/1 �"' 5. Example: Assume industrial waste discharge of 100,000 gallons per month, with BOD = 500 mg/1 and S.S. = 300 mg/1 : Ci = 100 [0.3745 x 260 + 0.2911 x 60] 1000 Ci = 0.1 (97.37 + 17.47) Ci = �11 .48 ,�:,�, , �,u�,� .