Chapter 17.135
CRITICAL AREAS – CRITICAL AQUIFER RECHARGE AREAS – SPECIFIC STANDARDS
Sections:
17.135.010 Purpose.
17.135.020 Objectives.
17.135.030 Relationship to general standards for critical aquifer recharge areas.
17.135.040 Designation.
17.135.050 Mapping.
17.135.060 Allowed permitted activities.
17.135.070 Prohibited uses.
17.135.080 Critical area report – Specific requirements for CARAs.
17.135.090 Class I and Class II operations.
17.135.100 Best management practices for Class I and Class II activities.
17.135.110 Halogenated solvent list.
17.135.010 Purpose.
It is the purpose of this chapter to protect wellheads and critical aquifer recharge areas in the Stanwood planning area. Additionally, it is the intent of this chapter to adopt development regulations, required in RCW 36.70A.060, precluding land uses or development that is incompatible with critical areas designated under RCW 36.70A.170. (Ord. 1164 § 4, 2004; Ord. 929 Ch. 10(I)(1), 1995).
17.135.020 Objectives.
The objectives of this chapter are to:
(1) Protect human life and health;
(2) Assure the long-term conservation of resource lands; and
(3) Further the public interest in the conservation and wise use of lands. (Ord. 929 Ch. 10(I)(2), 1995).
17.135.030 Relationship to general standards for critical aquifer recharge areas.
This chapter contains standards specific to critical aquifer recharge areas, which should be considered in conjunction with the standards in Chapter 17.114 SMC. Please refer to that chapter for general standards and administration. In the event of a conflict between this chapter and Chapter 17.114 SMC, this chapter shall control. (Ord. 1164 § 4, 2004; Ord. 929 Ch. 10(I)(3), 1995).
17.135.040 Designation.
Critical aquifer recharge areas (CARAs) are those areas with a critical recharging effect on aquifers used for potable water as defined by WAC 365-190-030(2). CARAs have prevailing geologic conditions associated with infiltration rates that create a high potential for contamination of groundwater resources or contribute significantly to the replenishment of groundwater. These areas include the following:
(1) Wellhead Protection Areas. Wellhead protection areas may be defined by the boundaries of the 10-year time of groundwater travel or boundaries established using alternate criteria approved by the Washington State Department of Health in those settings where groundwater time of travel is not a reasonable delineation criterion, in accordance with WAC 246-290-135.
(2) Sole Source Aquifers. Sole source aquifers are areas that have been designated by the U.S. Environmental Protection Agency pursuant to the Federal Safe Water Drinking Act.
(3) Susceptible Groundwater Management Areas. Susceptible groundwater management areas are areas that have been designated as moderately or highly vulnerable or susceptible in an adopted groundwater management program developed pursuant to Chapter 173-100 WAC.
(4) Special Protection Areas. Special protection areas are those areas defined by WAC 173-200-090.
(5) Moderately or Highly Vulnerable Aquifer Recharge Areas. Aquifer recharge areas that are moderately or highly vulnerable to degradation or depletion because of hydrogeologic characteristics are those areas delineated by a hydrogeologic study prepared in accordance with the State Department of Ecology guidelines.
(6) Moderately or Highly Susceptible Aquifer Recharge Areas. Aquifer recharge areas moderately or highly susceptible to degradation or depletion because of hydrogeologic characteristics are those areas meeting the criteria established by the State Department of Ecology. (Ord. 1164 § 4, 2004; Ord. 929 Ch. 10(I)(4), 1995).
17.135.050 Mapping.
(1) The approximate location and extent of critical aquifer recharge areas are shown on the adopted critical areas maps (see the Natural Features Element of the Stanwood Comprehensive Plan).
(2) These maps are to be used as a guide for the city, project applicants, and/or property owners and may be continuously updated as new critical areas are identified. They are a reference and do not provide a final critical area designation. (Ord. 1164 § 4, 2004; Ord. 1110 § 3, 2002; Ord. 929 Ch. 10(I)(5), 1995).
17.135.060 Allowed permitted activities.
The following activities are permitted in a CARA without a critical areas report:
(1) Activities permitted under SMC 17.114.140.
(2) Residential uses hooked up to the city sewer.
(3) Commercial/industrial/institutional uses hooked up to the city sewer that do not utilize, produce, store, or otherwise discharge hazardous materials, as defined in WAC 173-303-090(8) or SMC 17.135.110.
(4) Utility lines. (Ord. 1164 § 4, 2004; Ord. 929 Ch. 10(I)(6), 1995).
17.135.070 Prohibited uses.
The following uses shall be prohibited from all critical areas identified as CARAs:
(1) Landfills. Landfills, including hazardous or dangerous waste, municipal solid waste, special waste, wood waste, and inert and demolition waste landfills;
(2) Underground Injection Wells. Class I, III, and IV wells and subclasses 5F01, 5D03, 5F04, 5W09, 5W10, 5W11, 5W31, 5X13, 5X14, 5X15, 5W20, 5X28, and 5N24 of Class V wells;
(3) Mining.
(a) Metals and hard rock mining; and
(b) Sand and gravel mining, prohibited from critical aquifer recharge areas determined to be highly susceptible or vulnerable;
(4) Wood Treatment Facilities. Wood treatment facilities that allow any portion of the treatment process to occur over permeable surfaces (both natural and manmade);
(5) Hard chrome plating operations;
(6) Chemical lagoons and pits;
(7) Hazardous material disposal sites;
(8) Storage, Processing, or Disposal of Radioactive Substances. Facilities that store, process, or dispose of radioactive substances;
(9) New septic systems; and
(10) Other Prohibited Uses or Activities.
(a) Activities that would significantly reduce the recharge to aquifers currently or potentially used as a potable water source;
(b) Activities that would significantly reduce the recharge to aquifers that are a source of significant baseflow to a regulated stream; and
(c) Activities that are not connected to an available sanitary sewer system, prohibited from critical aquifer recharge areas associated with sole source aquifers. (Ord. 1164 § 4, 2004).
17.135.080 Critical area report – Specific requirements for CARAs.
(1) A critical area report shall be required for any proposed use that is not permitted under SMC 17.135.060 or for any activity that is located within the one-year time of travel zone for any wellhead.
(2) An aquifer recharge area critical area report shall be prepared by a qualified professional who is a hydrogeologist, geologist, or engineer, who is licensed in the state of Washington and has experience in preparing hydrogeologic assessments.
(3) In addition to the requirements of SMC 17.114.160, a hydrogeological assessment shall be provided in a critical area report, and contain the following information:
(a) Available information regarding geologic and hydrogeologic characteristics of the site including the surface location of all critical aquifer recharge areas located on-site or immediately adjacent to the site, and permeability of the unsaturated zone;
(b) Groundwater depth, flow direction, and gradient based on available information;
(c) Currently available data on wells and springs within 1,300 feet of the project area;
(d) Location of other critical areas, including surface waters, within 1,300 feet of the project area;
(e) Available historic water quality data for the area to be affected by the proposed activity;
(f) Best management practices proposed to be utilized;
(g) Historic water quality data for the area to be affected by the proposed activity compiled for at least the previous five-year period;
(h) Groundwater monitoring plan provisions;
(i) Discussion of the effects of the proposed project on the groundwater quality and quantity, including:
(i) Predictive evaluation of groundwater withdrawal effects on nearby wells and surface water features; and
(ii) Predictive evaluation of contaminant transport based on potential releases to groundwater; and
(j) A spill plan that identifies equipment and/or structures that could fail, resulting in an impact. Spill plans shall include provisions for regular inspection, repair, and replacement of structures and equipment that could fail. (Ord. 1164 § 4, 2004).
17.135.090 Class I and Class II operations.
Certain nonresidential operations present a greater potential risk to water resources because of the volume and type of hazardous materials that are managed. These nonresidential operations are classified below and are subject to the stipulated actions defined in this section.
|
CLASSIFICATIONS
|
|
|
Classification |
Definition |
|
Class I Operations |
Operations that at any time within a one-year time period will or do manage over 220 pounds in total of the following: A. Hazardous materials, including any mixtures thereof, that contain constituents referenced in the Code of Federal Regulations, 40 CFR 302.4 (referenced in Section 103(a) of the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA)); or B. Hazardous materials, including any mixtures thereof, that contain constituents from the lists specified for Class II operations below. |
|
|
Concentration Declassification. A Class I operation shall no longer be a classified operation if the Class I constituents (40 CFR 302.4) contained in a product or waste are individually present at less than 1% by weight for noncarcinogenic hazardous materials, and less than 0.1% by weight for known or suspected carcinogenic hazardous materials. (Operators should review the Material Safety Data Sheet for the hazardous materials to make this determination). |
|
|
Consumer Quantity Declassification. A Class I operation shall no longer be a classified operation if both of the following conditions are met: A. The operation is focused on research, education, distribution or consumer-oriented activities, including but not limited to laboratories, hospitals, schools, cargo handlers, distributors, warehouses, or retailers; and B. Products containing Class I or Class II hazardous materials are managed in closed containers or sealed bags with individual capacities of no more than 10 gallons for a liquid material and no more than 80 pounds for a dry or solid material. |
|
|
Metal and Metal Alloy Declassification. Solid metals and solid metal alloys, including but not limited to roll stock, bar stock, sheet stock, and manufactured articles such as equipment, parts, building materials, and piping, that contain one or more metals listed in 40 CFR 302.4 or WAC 173-303-090(8) shall be declassified; except, that where machining, forming, grinding, cutting, melting, or other activities produce residues such as shavings, grindings, swarf, fume, or other finely divided particulate forms of a listed metal or metal alloy that may present a threat to water resources, such residues shall not be declassified. |
|
Class II Operations |
Operations that at any time within a one-year time period will or do manage over 2,200 pounds in total of the following: A. Hazardous materials, including any mixtures thereof, that exhibit the characteristic of toxicity because they contain leachable constituents as defined in WAC 173-303-090(8) as amended; or B. Hazardous materials, including any mixtures thereof, that contain constituents that are referenced on the Halogenated Solvent List set forth in SMC 17.135.110. |
|
|
Site Cleanup Reclassification. A Class II operation shall be reclassified as a Class I operation if the primary activity is site remediation or cleanup pursuant to an approved settlement agreement or a remedial action under Chapter 70.105B RCW. |
|
|
Concentration Reclassification. A Class II operation shall be reclassified as a Class I operation if the Class II constituents (from WAC 173-303-090(8)) are present in the hazardous materials being managed at concentrations of less than 5% by weight. |
|
|
Transfer Warehouse Reclassification. A Class II operation shall be reclassified as a Class I operation if the following conditions are met: A. The operation is a transfer warehouse where shipments of products, which may be hazardous materials but not dangerous wastes, are held in portable containers for transfer; and B. Containers of hazardous materials are not opened at the site under any circumstance; and C. Products containing Class II hazardous materials are managed in containers with individual capacities of no more than 400 gallons. |
|
|
Consumer Quantity Declassification. A Class II operation shall no longer be a classified operation if both of the following conditions are met: A. The operation is focused on research, education, distribution or consumer-oriented activities, including but not limited to laboratories, hospitals, schools, cargo handlers, distributors, warehouses, or retailers; and B. Products containing Class I or Class II hazardous materials are managed in closed containers or sealed bags with individual capacities of no more than 10 gallons for a liquid material and no more than 80 pounds for a dry or solid material. |
(Ord. 1164 § 4, 2004).
17.135.100 Best management practices for Class I and Class II activities.
(1) Development Restrictions. No Class I or Class II operations shall be permitted within the one-year time of travel zone in a wellhead protection area. No Class II operations shall be permitted within the five-year time of travel zone in a wellhead protection area.
(2) Structural Best Management Practices. All new Class I and II operations shall implement the provisions of this section prior to the date of issuance of the certificate of occupancy.
(a) Design and Construction. Operations shall be designed, constructed, maintained and operated to minimize the possibility of an unplanned release of hazardous materials to soil or water resources.
(b) Container/Tank Management. A container or tank holding a hazardous material shall always be closed, except to add or remove materials. Hazardous materials shall also be managed so that they do not damage the structural integrity of the operation or devices containing the material.
(c) Container/Tank Condition. All containers and tanks shall be maintained in such a manner as to assure effective operation and prevent the release of hazardous materials.
(d) Container/Tank Identification. The owner/operator shall label all containers and tanks containing hazardous materials to identify the major risk(s) associated with the contents. This labeling shall conform to applicable sections of the Uniform Fire Code, Occupational Safety and Health Standards, and/or the State of Washington’s Dangerous Waste Regulations.
(e) Releases and Ancillary Equipment. Any leaking pipe, pump, or other ancillary equipment shall be repaired or replaced promptly. All hazardous materials that have been released are to be contained and abated immediately. The City is to be notified of any release of hazardous materials in quantities greater than or equal to the reportable quantities referenced in 40 CFR 302.4 (also referenced in Section 103a of CERCLA), or releases of other hazardous materials that clearly impact water resources, as soon as possible but no later than 24 hours after the release. Ancillary equipment associated with hazardous materials shall be supported and protected against physical damage and excessive stress.
(f) Compatibility. The owner/operator shall use a container or tank made of or lined with materials which are compatible with the hazardous materials to be stored.
(g) Containment. Container and tank storage areas shall have a containment system that is capable of collecting and holding spills and leaks. This containment shall:
(i) Be constructed of an impervious surface with sealed joints;
(ii) Joints between concrete slabs and slab/foundation interfaces should be eliminated or minimized in the operation;
(iii) Provide pollution control measures to protect water resources, including run-off collection and discharge from active areas;
(iv) Be designed to provide secondary containment of 110 percent of the container’s or tank’s capacity; or in areas with multiple tanks, 110 percent of the largest tank or 10 percent of the aggregate tank volumes, whichever is larger. Secondary containment shall be provided in all areas where hazardous materials are loaded/unloaded, transferred, accumulated or stored; and
(v) Be compatible with the materials that are being handled.
(h) Loading Areas. Loading and unloading areas shall be designed, constructed, operated and maintained to:
(i) Contain spills and leaks that might occur during loading/unloading;
(ii) Prevent releases of hazardous materials to water resources;
(iii) Contain wash waters (if any) resulting from the cleaning of contaminated transport vehicles and load/unload equipment; and
(iv) Allow for removal as soon as possible any collected hazardous materials resulting from spills, leaks, and equipment cleaning.
(i) Closure. At closure of an operation, all remaining structures, containers, tanks, liners, and soil containing or contaminated with hazardous materials at concentrations above state and federal regulatory thresholds shall be decontaminated and properly disposed of or managed.
(3) Spill and Emergency Response Plan (SERP).
(a) All new Class I and II operations shall develop and implement a Spill and Emergency Response Plan (SERP) within 90 days of the date of issuance of the certificate of occupancy. Other operations may also be required to develop and implement a SERP if the city determines this action will help prevent releases of hazardous materials to water resources.
(b) The SERP shall be maintained on-site, and shall be made available to the city upon request.
(c) The SERP shall be updated at least every five years or as needed to reflect significant changes in operation or practices.
(d) At a minimum, the SERP shall include the following information:
(i) Spill Prevention.
(A) Drawings including the layout of the operation, a floor plan, direction of drainage, entrance and exit routes, and areas where hazardous materials are received, stored, transported, handled or used in operations.
(B) Listings of all hazardous materials on-site including types, volumes, locations and container types and sizes.
(C) Spill prevention related equipment including equipment which serves to detect releases of potential water resources contaminants.
(ii) Emergency Response.
(A) Chain of command and procedures for spill response.
(B) Phone list of response agencies including federal, state and city emergency contact numbers and environmental cleanup companies.
(C) Procedures for treating and disposing of spilled hazardous materials.
(iii) Certification. The SERP shall include a certification signed by an authorized representative of the operation stating: “I certify that the information provided in this document is to the best of my knowledge true and complete, and the spill prevention equipment and emergency response measures described herein are as stated.” The signed certificate shall include the authorized representative’s name (printed), title, and contact information.
(4) Operational Inspections.
(a) All new Class I and II operations shall implement the provisions of this section upon issuance of certificate of occupancy. Other operations may also be required to implement these provisions if the city determines this action will help prevent releases of hazardous materials to water resources.
(b) Schedule. The owner/operator shall develop a written schedule for inspecting all monitoring equipment, safety or emergency equipment, security devices, and any other equipment that helps prevent, detect, or respond to water resource-related hazards.
(c) Regular Inspections. The owner/operator shall perform site inspections to identify malfunctions and deterioration of equipment or containers, operator errors, discharges, or any other condition that may cause or lead to the release of hazardous materials to water resources. The owner/operator shall conduct these inspections often enough to identify problems in time to correct them before they impact water resources. Inspections shall be completed in all areas where hazardous materials are managed and a written record of those inspections made at least annually.
(d) Water Resource-Related Hazard Mitigation. The owner/operator shall remedy any problems revealed by the inspection. Where a water resource-related hazard is imminent or has already occurred, remedial action shall be taken immediately.
(5) Training Program.
(a) All new Class I and II operations shall implement the provisions of this section upon issuance of certificate of occupancy. Other facilities also may be required to implement these provisions if the city determines this action will help prevent releases of hazardous materials to water resources.
(b) Operations shall develop a training program or amend an existing program that informs employees at least once each year of any possible risks to water resources associated with on-site operations. The owner/operator shall ensure that employees know or understand:
(i) The location of hazardous materials managed at the operation and the associated potential risks to water resources;
(ii) The location of material safety data sheets (MSDS) at the operation;
(iii) How employees can detect the presence or release of hazardous materials;
(iv) How employees can protect themselves through work practices, emergency procedures, and with personal protective equipment;
(v) How to locate and use the operation’s spill and emergency response plan; and
(vi) How to prevent the pollution or contamination of water resources.
(6) Closure Plan.
(a) Each new Class II operation shall prepare and submit to the city a closure plan within six months of the date of issuance of the certificate of occupancy. Class II operations shall ensure that their facilities are closed in a manner that prevents the release of hazardous materials during closure, protects water resources, and prevents post-closure escape of hazardous materials to water.
(b) Plan Requirements. The closure plan shall detail the means by which the operation will, upon any closure anticipated to be longer than two years, remove and properly dispose of hazardous materials, and perform an investigation to confirm the presence or absence of hazardous materials in the soil and groundwater, if potential contamination is indicated. Specifically, the closure plan shall include the following:
(i) A listing of the types and quantities of hazardous materials reasonably expected to be present on-site during the operating life of the operation.
(ii) A description of the plan for removal and disposal of hazardous materials.
(iii) A description of the plan to decontaminate containment systems and ancillary equipment.
(iv) An estimate of the cost to implement the closure plan, using the assumption that a third party will conduct removal and disposal activities.
(v) A certification signed by an authorized representative of the business/industry submitting the closure plan stating, “I certify that the information provided in this document is to the best of my knowledge accurate and the closure measures described herein will be implemented as stated.” The signed certificate shall include the authorized representative’s name (printed), title, and contact information.
(c) Report Update. The owner/operator of an operation shall update the closure plan every five years or recertify the current information and estimates. The closure plan shall also be updated if operating procedures change in such a way that the volume/mass of hazardous material is increased by 25 percent or more.
(7) Engineering and Operating Report. When the city recognizes and demonstrates a need for additional information on an operation’s practices, the city may require the operation to submit an engineering and operating report to accommodate the city’s review of operations and to prevent releases of hazardous materials to water resources. If required, the report shall provide the following:
(a) The type of industry or business including the kind and quantity of finished products.
(b) A process flow diagram illustrating the process flow of water and materials in a normal operating day. This will include details on the operation’s plumbing and piping and where specific chemicals are added to processes.
(c) A discussion of any discharges to the municipal sewer system.
(d) A discussion of any discharges through land applications, including seepage lagoons, irrigation, and subsurface disposal. As applicable, this discussion should also include the depth to groundwater and anticipated overall effects of the operations on the quality of water resources.
(e) Provisions for any plans for future expansion or intensification.
(f) A certification signed and dated by an authorized representative of the operation stating: “I certify that the information provided in this document is to the best of my knowledge true and complete.” The signed certificate shall include the authorized representative’s name (printed), title, and contact information.
(8) Records and Reports.
(a) Operations shall maintain records of required inspection, training, cleaning and maintenance events. Where operations are otherwise required by the city or another agency to maintain such records, those records shall satisfy this requirement. All operations shall maintain these records on-site for at least three years and shall make them available to the city upon request.
(b) Plans, reports or other documentation concerning the management of hazardous materials shall also be made available to the city upon request.
(c) Information provided to the city will be available to the public. Information not claimed as confidential at the time of submission will be made available to the public when requested. (Ord. 1164 § 4, 2004).
17.135.110 Halogenated solvent list.
|
HALOGENATED SOLVENT LIST |
|||
|
Solvent |
Synonym(s) |
CAS No. |
Specific Density (g/cc) |
|
Benzyl chloride |
Chloromethylbenzene |
100-44-7 |
1.100 |
|
Bis(2-chloroethyl)ether |
Bis(-chloroethyl)ether |
111-44-4 |
1.220 |
|
Bis(2-chloroisopropyl)ether |
Bis(-chloroisopropyl)ether |
108-60-1 |
1.103 |
|
Bromobenzene |
Phenyl bromide |
108-86-1 |
1.495 |
|
Bromochloromethane |
Chlorobromomethane |
74-97-5 |
1.934 |
|
Bromodichloromethane |
Dichlorobromomethane |
75-27-4 |
1.980 |
|
Bromoethane |
Ethyl bromide |
74-96-4 |
1.460 |
|
Bromoform |
Tribromomethane |
75-25-2 |
2.890 |
|
Carbon tetrachloride |
Tetrachloromethane |
56-23-5 |
1.594 |
|
Chlorobenzene |
Benzene chloride |
108-90-7 |
1.106 |
|
2-Chloroethyl vinyl ether |
(2-Chlorethoxy)ethane |
110-75-8 |
1.048 |
|
Chloroform |
Trichloromethane |
67-66-3 |
1.483 |
|
1-Chloro-1-nitropropane |
Chloronitropropane |
600-25-9 |
1.209 |
|
2-Chlorophenol |
o-Chlorophenol |
95-57-8 |
1.263 |
|
4-Chlorophenyl phenyl ether |
p-Chlorodiphenyl ether |
7005-72-3 |
1.203 |
|
Chloropicrin |
Trichloronitromethane |
76-06-2 |
1.656 |
|
m-Chlorotoluene |
|
108-41-8 |
1.072 |
|
o-Chlorotoluene |
2-Chloro-1-methylbenzene |
95-45-8 |
1.082 |
|
p-Chlorotoluene |
|
106-43-4 |
1.066 |
|
Dibromochloromethane |
Chlorodibromomethane |
124-48-1 |
2.451 |
|
1,2-Dibromo-3-chloropropane |
DPCP |
96-12-8 |
2.050 |
|
Dibromodifluoromethane |
Freon 12-B2 |
75-61-6 |
2.297 |
|
1,2-Dichlorobenzene |
o-Dichlorobenzene |
95-50-1 |
1.305 |
|
1,3-Dichlorobenzene |
m-Dichlorobenzene |
541-73-1 |
1.288 |
|
1,1-Dichloroethane |
1,1-DCA |
75-34-3 |
1.176 |
|
1,2-Dichloroethane |
Ethylene dichloride, 1,2-DCA |
107-06-2 |
1.235 |
|
1,1-Dichloroethene |
Vinylidene chloride 1,1-DCE |
75-35-4 |
1.218 |
|
trans-1,2-Dichloroethylene |
trans-1.2-DCE |
156-60-5 |
1.257 |
|
1,2-Dichloropropane |
Propylene dichloride |
78-87-5 |
1.560 |
|
cis-1,3-Dichloropropene |
cis-1,3-Dichloropropylene |
10061-01-5 |
1.224 |
|
trans-1,3-Dichloropropene |
trans-1,3-Dichloropropylene |
10061-02-0 |
1.182 |
|
Ethylene dibromide |
1,2-Dibromoethane, EDB |
106-93-4 |
2.179 |
|
Hexachlorobutadiene |
HCBD |
87-68-3 |
1.554 |
|
Hexachlorocyclopentadiene |
HCCPD |
77-47-4 |
1.702 |
|
Methylene chloride |
Dichloromethane |
75-09-2 |
1.327 |
|
Pentachloroethane |
Ethane pentachloride |
76-01-7 |
1.680 |
|
1,1,2,2-Tetrabromoethane |
Acetylene tetrabromide |
79-27-6 |
2.875 |
|
1,1,2,2-Tetrachloroethane |
Acetylene tetrachloride |
79-34-5 |
1.595 |
|
Tetrachloroethylene |
Perchlororethylene, PCE |
127-18-4 |
1.623 |
|
1,2,4-Tetrachlorobenzene |
1,2,4-TCB |
120-82-1 |
1.454 |
|
1,1,1-Trichloroethane |
Methyl chloroform, 1,1,1-TCA |
71-55-6 |
1.339 |
|
1,1,2-Trichloroethane |
1,1,2-TCA |
79-00-5 |
1.440 |
|
Trichloroethylene |
TCE |
79-01-6 |
1.464 |
|
1,1,2-Trichlorofluoromethane |
Freon 11 |
75-69-4 |
1.487 |
|
1,2,3-Trichloropropane |
Allyl trichloride |
96-18-4 |
1.389 |
|
1,1,2-Trichlorotrifluoroethane |
Freon 113 |
76-13-1 |
1.564 |
(Ord. 1164 § 4, 2004).