DDW-2024-012556

Disinfection: Chlorine Utah DEQ Yes
Construction Plan Review Checklist Division of Drinking Water No
N/A
Project Information Professional Engineer Responsible for Design
PWS Name: Woodland Hills City Name:
PWS ID: 25028 Registration No.:
Project Description: After the fact review of Broad Hollow Chlorinator identified during 2024 sanitary survey. Phone No.:
Email:
DDW Plan Review Information
Project File Number: 26805
Plan Review Engineer: Hunter Payne
Instructions: In the appropriate column below, for the Design Engineer or DDW Review Engineer, select a response from the dropdown menu indicating whether each requirement listed is
addressed in the plans and specs. Add Notes if needed to explain responses. Consult the UAC rules cited to fully understand the details of the regulatory requirements; the summaries
below are not meant to replace the rules.
UAC Rule Summary of Rule Requirement Design Engineer Review Engineer Notes
Engineer (note reason below if answer is 'No')
General Requirements
R309-500-6 (2)(b) Plans and specifications sufficiently detailed to assure properly constructed project N/A
R309-500-6 (2)(c) Plans and specifications stamped, dated, and signed by PE N/A
R309-500-6 (2)(e) Exception to rule requirements granted by the Director for alternative designs N/A
R309-520-6(1)(a) Continuous disinfection is provided for all ground water sources that do not continuously meet microbiological standards N/A
R309-520-6(1)(a) Intermittent or batch disinfection is not acceptable alternative to continuous disinfection (prohibition) N/A
R309-520-6(1)(b) Purpose of disinfection is other than to remedy physical deficiencies
R309-520-6(1)(b) Purpose of disinfection is other than to remedy sources susceptible to surface water influence
R309-520-6(1)(b) Purpose of disinfection is other than to mask ongoing contamination
R309-520-6(1)(b) Purpose of disinfection is other than use as a substitute for correcting deficiencies
R309-520-6(1)(c) If continuous disinfection required, disinfect. equip. can be isolated/serviced wo/ allowing untreated water to enter dist. sys.
R309-520-6(1)(c) Discharge of untreated water avoids environmental or property damage
R309-520-6(2) Chemicals added to drinking water (chlorine, chloramines, hypochlorite solutions, chlorine dioxide) meet ANSI/NSF 60 Yes
R309-520-6(3)(a) Surface water & GWUDI filtered by conventional SW treatment or alternative SW treatment & disinfected per R309-200-7
R309-520-6(3)(b) If microbiological treatment is required for a ground water source, disinfection without filtration is provided
R309-520-6(4)(a) Disinfectant contact time considers pH, NH3, taste-producing substances, temp, biological quality & other pertinent factors
R309-520-6(4)(b) Design minimizes formation of disinfection byproducts
R309-520-6(4)(c) Treatment of ground water sources provides sufficient CT to achieve min. of 4-log virus inactivation and/or removal
R309-520-6(4)(d) Point of application for disinfectants located to achieve required disinfection CT prior to first service connection
R309-520-6(5) Disinfection installations sited to permit convenient access during operation period
R309-520-6(5) Installation site considers possible danger to nearby population
R309-520-6(5) Installation site considers possible jeopardy from seismic fault zones
R309-515-4(7) Location of each point of diversion provided (lat and long; or section, township, range)
N/A Project will resolve existing physical deficiencies
General Requirements for All Chlorination Installations
R309-520-7(1)(a) Chlorine disinfection done by gaseous chlorine or hypochlorite solutions Yes
R309-520-7(1)(a) Hypochlorite solutions purchased, generated on site, or prepared by dissolving solids N/A
R309-520-7(1)(b) Feed equipment is solution-feed gas type, direct-feed gas type, or positive-displacement hypochlorite liquid feed Yes
R309-520-7(1)(b) Solution-feed gas type chlorinator is preferred (recommendation) Yes
R309-520-7(1)(b) Caution used when selecting direct-feed gas type chlorinators (recommendation) Yes
R309-520-7(1)(c)(i) Chlorine feed equipment sized to provide min. of 2 mg/L during peak demand Yes
R309-520-7(1)(c)(ii) Chlorine feed equipment designed to operate accurately over the design feeding range Yes
R309-520-7(1)(c)(iii) Chlorine feed equipment designed to maintain detectable residual at all times, at all points in intended area of dist. system Yes
R309-520-7(1)(d) Automatic proportioning chlorinators provided where flow-rate or chlorine demand of water to be treated is not constant Yes
R309-520-7(1)(e)(i) Chlorine added at a point the allows rapid and thorough mixing Yes
R309-520-7(1)(e)(i) The center of the pipeline is the preferred application point (recommendation) Yes
R309-520-7(1)(e)(ii) Equipment selection considers point of application, quantity of chlorine to be added, size and flow of chlorine solution line, back pressure of to-be-treated water
flow, and equipment operating pressure Yes
R309-520-7(1)(e)(iii) Strainer to prevent small debris from clogging chlorine feed equipment provided Yes
R309-520-7(1)(e)(iii) Provision to flush strainer is provided Yes
R309-520-7(1)(f) Design of treatment plants for surface water or UDI allow chlorine to be added at various process points as needed N/A
R309-520-7(1)(g) Design minimizes release of chlorinated water to the environment Yes
R309-520-7(1)(g) Release of chlorinated water complies with DWQ rules N/A
R309-520-7(1)(h)(i) Design prevents contamination of treated water supply by make-up water of lesser quality Yes

R309-520-7(1)(h)(ii) Chlorine solution make-up water quality is at least equal to water receiving the chlorine solution Yes
R309-520-7(1)(h)(ii) At surface water treatment plants, pre- & post-chlorination are independent where pre-chlorination uses unfinished water N/A
R309-520-7(1)(i) Chlorination system provides means to measure flow rate of treated water as basis for dosing Yes
R309-520-7(1)(j) Chlorine residual test equipment available (to nearest 0.1 mg/L for range >0.5 mg/L; to nearest 0.3 mg/L for range from 0.5 mg/L to 1.0 mg/L; to nearest 0.5 mg/L for
range >1.0 mg/L) Yes
R309-520-7(1)(k)(i) Spare parts kit provided Yes
R309-520-7(1)(k)(i) Multiple gas metering tubes provided, min. 1 per each dose range, for large variation between routine & emergency dosages N/A
R309-520-7(1)(k)(ii) Where disinfection is required, standby equipment of sufficient capacity to replace the largest unit is provided Yes
R309-520-7(1)(k)(iii) Where disinfection is required, standby power is available, unless chlorinator operates without power Yes
R309-520-7(1)(l) Chlorinator building heated for proper equipment operation and operator safety Yes
R309-520-7(1)(l) Chlorinator building lighted for proper equipment operation and operator safety Yes
R309-520-7(1)(l) Chlorinator building ventilated for proper equipment operation and operator safety Yes
R309-520-7(1)(m) Incompatible chemicals stored separately from chlorination equipment and chemicals Yes
Additional Requirements for Gas Chlorinators - Cylinder Switch-over and Scrubbers
R309-520-7(2)(a) If continuous chlorination disinfection is required, automatic switch-over of chlorine cylinders is provided Yes
R309-520-7(2)(b) Operating areas for one-ton chlorine cylinders equipped with gas scrubbers per International Fire Code capable of treating gas release from largest cylinder at maximum
flow rate N/A
R309-520-7(2)(b) Local toxic gas ordinances met Yes
Additional Requirements for Gas Chlorinators - Heat, Ventilation, and Housing
R309-520-7(2)(c) Design assures that room temp. will not fall below 32° F or other temperature required for proper chlorinator operation Yes
R309-520-7(2)(d)(i) Chlorination equipment rooms w/ cylinders, tanks, equip., & gaseous chlorine lines under pressure have min. of 1 exhaust fan Yes
R309-520-7(2)(d)(ii) Chlorine room exhaust fan provides min. of one complete change of room air per minute Yes
R309-520-7(2)(d)(iii) Chlorine room exhaust fan takes suction inside the room near the floor Yes
R309-520-7(2)(d)(iii) Chlorine room exhaust fan takes suction as far as practical from door Yes
R309-520-7(2)(d)(iii) Chlorine room exhaust fan takes suction as far as practical from air inlet Yes
R309-520-7(2)(d)(iii) Chlorine room exhaust fan discharges air outside of building Yes
R309-520-7(2)(d)(iii) Chlorine room exhaust fan discharges air outside away from air inlets Yes
R309-520-7(2)(d)(iv) Chlorine room air inlets have wall louvers Yes
R309-520-7(2)(d)(iv) Chlorine room air inlets are near the ceiling Yes
R309-520-7(2)(d)(v) Separate switches for chlorine room fans and lights located near entrance to room Yes
R309-520-7(2)(d)(v) Separate switches for chlorine room fans and lights protected from vandalism Yes
R309-520-7(2)(d)(v) Switches for fans and lights located outside of a chlorine room housed in water treatment plant N/A
R309-520-7(2)(d)(vi) Vent system for 1-ton chlorine cylinder operating area designed to operate independently from treatment plant vent system N/A
R309-520-7(2)(d)(vi) One-ton chlorine cylinder operating area designed to maintain negative pressure per International Fire Code N/A
R309-520-7(2)(e) Chlorine vent line discharges outside Yes
R309-520-7(2)(e) Chlorine vent line discharges above grade Yes
R309-520-7(2)(e) Chlorine vent line discharges at point least susceptible to vandalism Yes
R309-520-7(2)(e) Chlorine vent line end covered with no. 14 mesh non-corrodible screen Yes
R309-520-7(2)(f)(i) Housing provided for chlorination equipment and storage to ensure proper function and security Yes
R309-520-7(2)(f)(ii) Chlorine cylinders not stored in direct sunlight Yes
R309-520-7(2)(f)(ii) Chlorine cylinders not exposed to excessive heat Yes
Additional Requirements for Gas Chlorinators - Housed at Water Treatment Plants
R309-520-7(2)(g) At WTP w/ multiple processes & operating areas, separate chlorine room provided for chlorine cylinders and feed equipment
R309-520-7(2)(g)(i) Chlorine room has shatter resistant inspection window in an interior wall
R309-520-7(2)(g)(i) Chlorine room inspection window is where operator may read weight scales wo/ entering chlorine room (recommendation)
R309-520-7(2)(g)(ii) All openings between chlorine room and remainder of plant are sealed
R309-520-7(2)(g)(iii) Outward-opening doors are provided
R309-520-7(2)(g)(iii) Doors are equipped with panic bars
R309-520-7(2)(g)(iv) Floor drains are discouraged (but not prohibited)
R309-520-7(2)(g)(iv) Where provided, floor drains discharge outside of the building
R309-520-7(2)(g)(iv) Where provided, floor drains are not connected to other internal or external drain systems
R309-520-7(2)(g)(v) Chlorine feed lines do not carry pressurized chlorine gas beyond the chlorine room
R309-520-7(2)(g)(v) Vacuum lines may be routed to other parts of the building outside of the chlorine room
R309-520-7(2)(g)(v) Openings for vacuum lines are sealed
R309-520-7(2)(g)(vi) Operating areas for one-ton cylinders are designed to store full and empty cylinders in separate areas
Additional Requirements for Gas Chlorinators - Cylinder Security, Weight Scales, & Pressure Gauges
R309-520-7(2)(h) Chlorine cylinders are restrained in position to prevent upset Yes
R309-520-7(2)(i) Scales provided to determine chlorine cylinder weight Yes
R309-520-7(2)(i) Scales are made of corrosion-resistant material Yes
R309-520-7(2)(i) Scales are located remote from moisture Yes

R309-520-7(2)(i) Scales are accurate enough to indicate weight loss to nearest 1 lb for 150 cylinders, nearest 10 lbs for one-ton cylinders Yes
R309-520-7(2)(j) Pressure gauges provided on inlet and outlet of each chlorine eductor Yes
Additional Requirements for Gas Chlorinators - Respiratory Protection
R309-520-7(2)(k)(i) One-ton cylinders: respiratory protection equipment meeting NIOSH requirements available
R309-520-7(2)(k)(i) One-ton cylinders: respiratory protection equipment stored in room where chlorine is not used or stored
R309-520-7(2)(k)(i) One-ton cylinders: respiratory protection equipment uses compressed air
R309-520-7(2)(k)(i) One-ton cylinders: respiratory protection equipment has min. of 30 minute capacity
R309-520-7(2)(k)(i) One-ton cylinders: respiratory protection equipment compatible with units used by fire department responsible for plant
R309-520-7(2)(k)(ii) 150-pound cylinders: respirator recommended by NIOSH is available
Additional Requirements for Gas Chlorinators - Leak Detection and Repair
R309-520-7(2)(l)(i) Bottle of ammonium hydroxide, 56% ammonia solution, is available Yes
R309-520-7(2)(l)(ii) One-ton cylinders: leak repair kit approved by Chlorine Institute is available
R309-520-7(2)(l)(iii) One-ton cylinders: continuous leak detection equipment is provided
R309-520-7(2)(l)(iv) If present, continuous leak detector is equipped with audible alarm and warning light Yes
Additional Requirements for Hypochlorite Systems - General
R309-520-7(3)(a)(i) Concentrated hypochlorite solutions >55 gal: emergency eyewash and safety showers are provided
R309-520-7(3)(a)(i) Concentrated hypochlorite solutions ≤55 gal: emergency eyewash is provided (shower not required)
R309-520-7(3)(a)(i) Remote locations handling hypochlorite solutions: emergency eyewash is provided (shower not required)
R309-520-7(3)(a)(ii) Storage & injection areas are designed to min. decay in strength of concentrated hypochlorite solutions by excessive heat
R309-520-7(3)(a)(ii) Storage & injection areas are designed to minimize decay in strength of concentrated hypochlorite solutions by direct sunlight
R309-520-7(3)(a)(iv) Hypochlorite feed equipment is certified to meet ANSI/NSF 61
Additional Requirements for Hypochlorite Systems - Chemical Storage
R309-525-11(6)(a)(i)(A) Space provided for adequate supply of chemicals
R309-525-11(6)(a)(i)(B) Space provided for convenient and efficient handling of chemicals
R309-525-11(6)(a)(i)(C) Space provided for dry storage conditions
R309-525-11(6)(a)(ii) Dedicated storage tank and pipeline provided for each specific liquid chemical
R309-525-11(6)(a)(iii) Chemicals stored in covered or unopened shipping containers or transferred to covered storage unit
Additional Requirements for Hypochlorite Systems - Chemical Storage: Liquid Chemical Storage Tanks
R309-525-11(6)(a)(iv)(A) Tank has a liquid level indicator
R309-525-11(6)(a)(iv)(B) Tank has an overflow that does not discharge to the environment
R309-525-11(6)(a)(iv)(B) Tank has a basin or drain to receive spills without discharging to the environment
R309-525-11(6)(a)(iv)(C) Tank has an inverted "J" air vent
Additional Requirements for Hypochlorite Systems - Safe Handling
R309-525-11(6)(b)(i) Safety Data Sheets for all chemicals on prominent display and easily accessible
R309-525-11(6)(b)(ii) Provisions made to dispose of empty bags, drums, or barrels without exposing operator to dust
R309-525-11(6)(b)(iii) Provisions made to measure quantity of chemicals used to prepare feed solutions
Additional Requirements for Hypochlorite Systems - Dust Control and Ventilation
R309-525-11(6)(c) Provisions made to control dust and provide ventilation
Additional Requirements for Hypochlorite Systems - Feeder Design
R309-525-11(7)(a)(i) Feeder supplies chemical at accurately controlled rate throughout anticipated feed range
R309-525-11(7)(a)(ii) Feeder surfaces and materials in contact with chemicals are resistant to aggressiveness of the chemical
R309-525-11(7)(a)(iii) Corrosive chemicals fed in a manner to minimize corrosion
R309-525-11(7)(a)(iv) Incompatible chemicals not fed, stored, or handled together
R309-525-11(7)(a)(v) Chemicals conducted from feeder to point of application in separate conduits
R309-525-11(7)(a)(vi) Spare parts available to replace feeder parts subject to wear and damage
R309-525-11(7)(a)(vii) Chemical feeder is as near as practical to the feed point
R309-525-11(7)(a)(viii) Feeders and pumps operate at no less than 20% of feed range
R309-525-11(7)(a)(ix) Chemicals are fed by gravity where practical
R309-525-11(7)(a)(x) Feeder is readily accessible for servicing, repair, and observation
Additional Requirements for Hypochlorite Systems - Feed Equipment
R309-525-11(7)(b)(i) Minimum of two feeders, active and standby, provided for each chemical (when disinfection is required)
R309-525-11(7)(b)(ii) Standby unit or units available to replace largest unit during shut down (when disinfection is required)
R309-525-11(7)(b)(iii) If a booster pump is required, a duplicate pump is provided (when disinfection is required)
R309-525-11(7)(b)(iii) If a booster pump is required, standby power is provided (when disinfection is required)
R309-525-11(7)(b)(iv) Separate feeder provided for each non-compatible chemical fed with a pump (when disinfection is required)
R309-525-11(7)(b)(v) Spare parts available to replace feeder parts subject to wear and damage (when disinfection is required)
Additional Requirements for Hypochlorite Systems - Dry Chemical Feeders
R309-525-11(7)(c)(i) Chemical feed rate measured volumetrically or gravimetrically (by weight)
R309-525-11(7)(c)(ii) Solution tank provided with adequate solution water and agitation
Additional Requirements for Hypochlorite Systems - Feed Rate Control

R309-525-11(7)(d)(i) Automatically controlled feeders can be manually overridden
R309-525-11(7)(d)(ii) Chemical feed rates are proportional to flows
R309-525-11(7)(d)(iii) Means to measure water flow rate provided
R309-525-11(7)(d)(iv) Means to measure quantity of chemicals used provided
R309-525-11(7)(d)(v)(C) Weighing scales provided for volumetric dry chemical feeder
R309-525-11(7)(d)(v)(D) Weighing scales for volumetric dry chemical feeder is accurate to 0.5% of the scale capacity
Additional Requirements for Hypochlorite Systems - Liquid Chemical Solution Pumps
R309-525-11(8)(a) Positive displacement feed pump specified to feed liquid chemicals but not slurries
R309-525-11(8)(a) Pump sized to meet or exceed maximum head at injection point
R309-525-11(8)(a) Pump provided with anti-siphoning device approved by Utah Plumbing Code
Additional Requirements for Hypochlorite Systems - Solution Tanks
R309-525-11(8)(b)(i) Tank has means to maintain uniform solution strength
R309-525-11(8)(b)(i) Continuous agitation provided to maintain slurries in suspension
R309-525-11(8)(b)(ii) Means provided to measure solution level in tank
R309-525-11(8)(b)(iii) Tank is covered
R309-525-11(8)(b)(iii) Large tanks with access openings have curbed openings with tight overhanging covers
R309-525-11(8)(b)(iv)(A) Subsurface location is free from possible sources of contamination
R309-525-11(8)(b)(iv)(B) Subsurface location allows positive drainage of groundwater, accumulated water, chemical spills, and overflows
R309-525-11(8)(b)(v)(A) Overflow pipe, if present, has free-fall discharge
R309-525-11(8)(b)(v)(B) Overflow pipe, if present, is located where noticeable
R309-525-11(8)(b)(vi) Acid storage tank vented to outside atmosphere and not in common with a day tank
R309-525-11(8)(b)(vii) Tank provided with vavled drain protected against back flow
R309-525-11(8)(b)(viii) Tank located and provided with protective curbing to collect chemicals from equipment failure, spills, or accidental drainage
Additional Requirements for Hypochlorite Systems - Day Tanks
R309-525-11(8)(c)(i) Day tank is provided if dilution of liquid chemical is required before being fed
R309-525-11(8)(c)(ii) Cross-connection control provided per R309-525-11(9)(b)
R309-525-11(8)(c)(iii) Tank holds no more than a 30-hour supply unless longer period is allowed by manufacturer
R309-525-11(8)(c)(iv) Tank is scale-mounted, has a gauge tube, has translucent sidewalls, or has a calibrated gauge to determine liquid level
R309-525-11(8)(c)(v) Transfer of chemical to day tank is by hand pump, tip rack, or motor-driven pump
R309-525-11(8)(c)(v) Day tank has a liquid-level limit switch and overflow if chemical is transferred to a day tank by a motor-driven pump
R309-525-11(8)(c)(v) Spill containment or an overflow draining to bulk tank is provided if chemical is transferred to day tank by motor-driven pump
R309-525-11(8)(c)(vi) Means provided to maintain uniform solution strength
R309-525-11(8)(c)(vi) Continuous agitation provided for chemical slurries
R309-525-11(8)(c)(vii) Tank labeled to identify contents
Additional Requirements for Hypochlorite Systems - Feed Lines
R309-525-11(8)(d)(i) Lines are as short in length as possible
R309-525-11(8)(d)(i)(A) Lines are durable and corrosion resistant
R309-525-11(8)(d)(i)(B) Lines are easily accessible throughout the entire length
R309-525-11(8)(d)(i)(C) Lines protected from freezing
R309-525-11(8)(d)(i)(D) Lines are readily cleanable
R309-525-11(8)(d)(iii) Design considers scale formation and solids deposition of the solution the line will carry
Additional Requirements for Hypochlorite Systems - In-Plant Make-Up Water Supply
R309-525-11(9)(a)(i) Make-up water supply is ample, has adequate pressure, and is equal or better in quality than water at point of application
R309-525-11(9)(a)(ii) Means provided to measure water used when preparing specific solution concentrations by dilution
R309-525-11(9)(a)(iii) Make-up water supply protected from backflow
Additional Requirements for Hypochlorite Systems - Cross-Connection Control
R309-525-11(9)(b)(i) Water lines to solution tanks properly protected from backflow per Utah Plumbing Code
R309-525-11(9)(b)(ii) Liquid chemical solutions cannot be siphoned through solution feeders into process units
R309-525-11(9)(b)(iii) Overflow or drain from feeder or solution tank not directly connected to a sewer
R309-525-11(9)(b)(iii) Overflow or drain from feeder or solution tank terminates at least 6" or two pipe diameters above overflow rim of receiving sump, conduit, or waste receptacle

R309-525-11(9)(b)(iv) Pre- and post-chlorination systems are independent
R309-525-11(9)(b)(iv) Water supply to each eductor for pre- and post-chlorination systems has a separate shut-of valve (no master shut-off valve)
Additional Requirements for Hypochlorite Systems - Liquid Chemical Feeder Siphon Control
R309-525-11(9)(c) Liquid chemical feeder has positive pressure at discharge point, vacuum relief, air gap, or other means to prevent siphon of chemical solution into process units
Additional Requirements for Hypochlorite Systems - Concentrated Hypochlorite Solutions
R309-520-7(3)(b) Operational means provided to avoid injection of significantly decayed hypochlorite solutions
Additional Requirements for Hypochlorite Systems - On-Site Generation of Hypochlorite Solutions
R309-520-7(3)(c)(i) On-site hypochlorite generation system is certified to meet ANSI/NSF 61
R309-520-7(3)(c)(ii) Manufacturer’s recommendations for safety of equipment and electrical power are followed

R309-520-7(3)(c)(iii) Make-up water used for on-site generation is of drinking water quality
R309-520-7(3)(c)(iv) Hydrogen gas generated in electrolytic cell is vented upward
R309-520-7(3)(c)(iv) Hydrogen gas generated in electrolytic cell is vented outside of building
R309-520-7(3)(c)(iv) Hydrogen gas generated in electrolytic cell is vented in dedicated line
R309-520-7(3)(c)(iv) Hydrogen gas generated in electrolytic cell is vented in unobstructed line
Additional Requirements for Hypochlorite Systems - Hypochlorite Tablets
R309-520-7(3)(d)(i) Water hardness, tablet solubility, water temp. & other water quality factors considered before selecting disinfection process
R309-520-7(3)(d)(ii) Hypochlorite dissolution equipment is certified to meet ANSI/NSF 61
R309-520-7(3)(d)(iii) Design allows tablets to be stored according to manufacturer’s safety guidelines
R309-520-7(3)(d)(iii) Design allows tablets to be stored in original containers
R309-520-7(3)(d)(iii) Design allows tablets to be stored in cool area
R309-520-7(3)(d)(iii) Design allows tablets to be stored in dry area
R309-520-7(3)(d)(iii) Design allows tablets to be stored in well-ventilated area
R309-520-7(3)(d)(iii) Hypochlorite tablets to be stored away from combustible materials
R309-520-7(3)(d)(iii) Hypochlorite tablets to be stored away from acids