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WESTERN KENTUCKY UNIVERSITY

By Vincent Boyd,2014-06-05 19:07
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WESTERN KENTUCKY UNIVERSITY

WESTERN KENTUCKY UNIVERSITY

    Technical Assistance Center for Water Quality

    Mr. Brents Dickinson

    Sanitary Survey

    Self-Assessment

    Guide for

    Ground Water

    1

TECHNICAL ASSISTANCE CENTER FOR WATER QUALITY

    Sanitary Survey Self-Assessment Guide

    for Ground Water

     TACWQ

    Center for Water Resource Studies • Western Kentucky University

    2355 Nashville Rd., Rm.127 • Bowling Green, KY 42101

    Phone 270.745.5948 • Fax 270.745.6856

    2

    SANITARY SURVEY SELF ASSESSMENT GUIDE

    For

    GROUND WATER SUPPLIES

1.0 Preliminary Information:

     Name of Utility: __________________________________ Publicly Owned ___

    Address: Street: __________________________________ Privately Owned ___

     City & Zip : _____________________________________

     Phone : _____________________________________

     Fax : _____________________________________

     E-mail : _____________________________________

     Person in Charge

    Name_________________________________________

    Address: ______________________________________

    Phone # Business: _______________________________

    Phone # Home _______________________________

     Are all services metered? Yes ___No ___

    How many metered? ___ How many customers _____

     Does the system have an interconnection with neighboring systems? Yes __No __

2.0 SOURCE WATER PROTECTION

    2.1 Source Water (Wellhead) Protection Plan

    Phase I Includes

    2.2 Planning Team formed Yes__ No__

    2.3 The land to be protected has been identified (Delineation) Yes__ No __

     Phase II Includes

    2.4 Potential contaminants identified Yes__ No __

    2.5 Plan developed to manage the source of contaminants Yes __ No __

    2.6 Emergency (Contingency) plan developed Yes__ No __

     2.7 Plan has been reviewed by the State and Certified? Yes __ No __

3.0 GROUNDWATER GENERAL INFORMATION

    3.1 Well sites and pumping

    WELL # 1 2 3 4 5

     Well Production

    Static Water Level

    Pumping Water Level

    Drawdown

    Well Yield (GPM)

    Specific Capacity GPM/FT)

     Pump Information

    Type

    TDH

    GPM

    Horse Power

    3

    3.2 Well Test Records includes the following information:

    Type of construction: Dug___ Drilled___ Bored ___ Driven___

    Infiltration Lines___

    3.2.1 Total Dynamic Head Yes __No __

    3.2.2 Static water level Yes __No __

    3.2.3 Depth of test pump Yes __No __

    3.2.4 Time of start and end of each pump cycle Yes __No __

    3.2.5 The zone of influence for each well Yes __No __

    3.2.6 The Specific Capacity Yes __ No __

    3.3 Quantity

    The total ground water source capacity equals or exceeds the maximum day

    demand or Yes __ No __

     Exceed the average day demand with the largest producing well out of service

     Yes __ No __

    Standby power provided? Connection to two independent power sources ___

    or

     Portable or in-place auxiliary power ___

    3.4 Location

     Wells are located with regard to proper separation between sources of

    contamination (See Field Guide Section 3.4 page 5) Yes __ No __

     Continued protection is provided by:

    Ownership __Easements __Lease __ Other __

    Well site is fenced Yes __ No __

    4.0 General well construction

    4.1 “As Built” or “Record Drawings” are available Yes __ No __

     4.2 Casing pipe

    4.2.1 Steel casing pipe meets AWWA Standard A-100 Yes __ No __

    4.2.2 Nonferrous casing material approved by the reviewing authority

     Yes __ No __

    4.3 Packing material type

    4.4 Screens

    4.4.1 Has sufficient length and diameter to provide specific capacity

     Yes __ No __

     4.4.2 Entrance velocity does not exceed 1 foot/second. Yes __ No __

    4.4.3 Provided with a bottom plate or washdown bottom fitting of the same

    material as the screen Yes __ No __

    4.5 Grouting

    4.5.1 Type of grout: Neat cement grout __ Concrete grout __Clay grout __

    4.5.2 The casing is provided with sufficient guides welded to the casing to

    permit unobstructed and uniform thickness of grout. Yes __ No __ 4.6 Upper terminal well construction

    4.6.1 The permanent casing projects at least 12 inches above the pump house

    floor and at least 18 inches above the final ground surface.

     Yes __ No __

    4

    4.6.2 Well house floor is at least 6 inches above the final ground elevation

     Yes__ No __

    4.6.3 Sites subject to flooding:

    4.6.3.1 Is provided with an earth mound, steel or concrete structure to

    raise the pump house at least 2 feet above the highest known

    flood elevation, and Yes __ No __

    4.6.3.2 The top of the well casing terminates at least 3 feet above the

    100-year flood or the highest known flood level, whichever is

    greater Yes __ No __

     4.6.4 Well-casing vent is provided and above flood level Yes __ No __

     4.6.5 Provisions are made for measurement of the water levels in the well

     Yes __ No __

    5.0 GROUNDWATER TREATMENT

    5.1 Aeration Type: Natural draft __ Forced draft __ Packed tower __

     5.1.1 Natural Draft Aerator The design provides the following:

    5.1.1.1 The distribution pan perforations are 3/16 to ? inches in

    diameter and spaced 1 to 3 inches on center to maintain a 6-inch

    water depth. Yes __ No __

    5.1.1.2 Discharges through a series of three or more trays separated by

    12 inches or more Yes __ No __

    5.1.1.3 Loading rate of 1 to 5 gallons per minute per square foot of total

    tray area Yes __ No __

    5.1.1.4 Trays with slotted, heavy wire (1/2-inch openings) mess or

    perforated bottom. Yes __ No __

    5.1.1.5 Construction of durable material resistant to aggressiveness of

    the water and the dissolved gases Yes __ No __

    5.1.1.6 Louvers sloped to the inside at an angle of approximately 45

    degrees Yes __ No __

    5.1.1.7 Protected from insects by a 24-mesh screen. Yes__ No __ 5.1.2 Forced Draft or Induced Draft Aerator is designed to

    5.1.2.1 Include a blower with a weatherproof motor in a screened

    enclosure. Yes __ No __

    5.1.2.2 Insure adequate counter current of air through the enclosed

    aerator column Yes __ No __

    5.1.2.3 Exhaust air directly to the outside atmosphere Yes __ No __

    5.1.2.4 Includes a down-turned 24 mesh screened air outlet and inlet.

     Yes __ No __

    5.1.2.5 Be such that air introduced in the column shall be free from

    obnoxious fumes, dust, and dirt Yes __ No __

    5.1.2.6 Be such that sections of the aerator can be easily reached or

    removed for maintenance of the interior or installed in a

    separate aerator room Yes __ No __

    5.1.2.7 Provides a loading rate of 1 to 5 gallons per minute per square

    foot of total tray area. Yes __ No __

    5

    5.1.2.8 Insure that the water outlet is adequately sealed to prevent the

    loss of air Yes __ No __

    5.1.2.9 Discharges through a series of 5 trays or more, separated by six

    inches or more. Yes __ No __

    5.1.1.10 Provides for uniform distribution of water over the top tray.

     Yes __ No __

    5.1.2.11 Be of durable material resistant to the aggressiveness of the

    water and dissolved gases Yes __ No __

    5.1.3 Packed Tower Aerator (Air Stripping)

    5.1.3.1 Disinfection capability is provided before and after the packed

    tower. Yes __ No __

    5.1.3.2 The packing material is resistant to the aggressiveness of the

    water and dissolved gases Yes __ No __

    5.1.3.3 Water flow system provides check all that apply

    Uniform distribution at the top of the tower ___

    A mist eliminator above the water distributor system ___

     side wiper-redistribution ring at least every 10 feet ___ A

    Sample taps in the influent and effluent lines ___

    A blow-off line in the effluent piping ___

    Metering of water to the tower ___

    An overflow line that discharges 12-14 inches above a splash

    pad or drainage inlet ___

    5.1.3.4 The air flow system provides Check all that apply

    A 24-inch mesh down turned screen on the air inlet to the

    blower and the tower discharge vent ___

    An air flow meter on the influent line ___

    A back up motor for the air blower ___

    5.1.4 Purpose

    Gas transfer __Iron & manganese removal __Taste & Odor __

    5.2 Lime-Soda Ash softening

    5.2.1 Rapid Mix

    5.2.1.1 Is equipped with mechanical mixing devices Yes __ No __ 5.2.1.2 Has a detention time not more than 30 seconds Yes __ No __

    5.2.2 Flocculation

    5.2.2.1 Inlet - outlet design prevents short-circuiting Yes __ No __ 5.2.2.2 Detention time is at least 30 minutes. Yes __ No __

    5.2.3 Sedimentation

    5.2.3.1 Provides a minimum of 4 hours detention time Yes __ No __ 5.2.3.2 Inlet-outlet devices designed to prevent short-circuiting

     Yes __ No __

    5.2.3.3 How is sludge removed? _____________________

    5.2.4 Filtration Rapid Sand Filter

    5.2.4.1 Please indicate the type of media used in your filter:

     Filter Sand __ Mixed Media __Dual Media __

    5.2.4.2 Please indicate the depth of media ___, gravel ___

    6

5.2.4.3 Indicate the type of underdrain system

     Wheeler __ Leopold __ Pipe System __Other __

    5.2.4.4 What is the approved rate of filtration for your filters? 2 _____ GPM/FT

    and the approved backwash rate for your filters? 2 _____ GPM/FT

    5.2.4.5 Filters are equipped with workable loss of head gages?

    Yes __ No __

    Filters are equipped with workable rate of flow controllers? Yes __ No __

    5.2.5 Clearwell Storage

    5.2.5.1 What is your clearwell capacity? ____________ Gallons

    Express capacity as a percent of the design plant capacity.

     ___ %

    5.2.5.2 If the ground water source is under the direct influence of 1surface water, what is the calculated CT value for your plant?

     ___ mg/l.mins

    Are you in compliance with the SWTR CT? Yes __ No __

    5.3 Iron & Manganese Removal

     5.3.1 By oxidation

    5.3.1.1 By aeration __

    5.3.1.2 By chemical oxidation - Check all that apply

    Chlorine __

    Potassium Permanganate __

    Ozone __

    Chlorine Dioxide __

     5.3.2 By lime-soda ash method (see Section 5.2) __

    5.3.3 By manganese greensand

    5.3.3.1 Provision is made to feed potassium permanganate as far away

    as possible from the filter Yes __ No __

    5.3.3.2 Provision is made to feed potassium permanganate immediately

    before the filter. Yes __ No __

    5.3.3.3 An anthracite media cap of at least 6 inches is provided over the

    greensand. Yes __ No __

    5.3.3.4 Rate of filtration is 3 gallons per minute per square foot

    Yes __ No __

     Rate of backwash is 8 to 10 gallons per minute per square foot

     Yes __ No __

     Air washing is provided Yes __ No __

    5.3.3.5 Sample taps are provided Check all that apply)

    5.3.3.5.1 Prior to application of permanganate __

    5.3.3.5.2 Immediately ahead of filtration __

    5.3.3.5.3 At the filter effluent __

    5.3.3.5.4 Points between the anthracite and the greens __

    5.3.3.5.5 A point half way down the greensand __

     1 See Attachment 4 Sanitary Survey Self Assessment Field Guide, Page 35

    7

5.3.4 By ion exchange ____

    This method should not be used when the concentration of iron,

    manganese, or a combination thereof exceed .3 mg/l

    5.4 Chemical feeders

    5.4.1 Liquid Chemical Feed System

    5.4.1.1 The liquid chemical feed system has a pump capacity at least

    10% larger than the maximum feed rate. Yes __ No __

    5.4.1.2 All storage tanks containing liquid chemicals have an eyewash,

    shower, clear warning signs, berms for containment, and

    adequate lighting and ventilation. Yes __ No __ 5.4.2 Dry Chemical Feeders

    5.4.2.1 A dust collector unit and an exhaust fan are installed in the

    feeder room Yes __ No __ 0 from the 5.4.2.2 The hopper bottom has an angle no greater than 30 vertical and is fitted with a vibrator Yes __ No

    5.4.2.3 Each dry chemical feeder has a calibration chart and is

    calibrated frequently. Yes __ No __

    5.4.3 Gas Feed System

    5.4.3.1 A solution feed vacuum pressure type feeder is used

    Yes __ No __ 5.4.3.2 A direct gas feeder is used Yes __ No __

    6.0 Chemical Treatment

    6.1 Disinfection

    6.1.1 Chlorine - Chlorine Equipment

    6.1.1.1 Chlorination equipment Check all that apply

     Solution-feed gas chlorinator __

     Hypochlorinator __

    6.1.1.2 The equipment operates accurately over the desired range

     Yes __ No __

    6.1.1.2 Standby equipment is available to replace the largest unit.

     Yes __ No __

    6.1.1.4 Spare parts are available. Yes __ No __

    6.1.1.5 Automatic switchover is provided to insure continuous

    disinfection Yes __ No __

    6.1.1.6 Gauges for measuring water pressure and vacuum at the inlet

    and outlet of each eductor is provided Yes __ No __

    6.1.1.7 The chlorine solution injector/diffuser is applied at the center of

    the pipeline Yes __ No __

    6.1.2 Residual Chlorine

    6.1.2.1 A minimum free chlorine residual of 0.20 mg/l is maintained at

    distant points in the distribution system Yes __No __

    6.1.2.2 A minimum combined chlorine residual of 1.0 mg/l is

    maintained at distant points of the distribution system.

     Yes __ No __

    8

    6.1.3 Test Equipment Chlorine residual test equipment is recognized in the

    latest edition of Standard Methods for the Examination of Water and

    Wastewater Yes __ No __

    6.1.4 Chlorinator piping

    6.1.4.1 The water supply to each eductor has a separate shut-off valve

     Yes __ No __

    6.1.4.2 Pipes carrying elemental liquid or dry gaseous chlorine under

    pressure is Schedule 80 seamless steel tubing or material

    approved by the Chlorine Institute Yes __ No __ 6.1.5 Chlorine Dioxide is used as a disinfectant. Yes __ No __ 6.1.6 Ozone is used as a disinfectant Yes__ No __

    6.1.7 Ultra Violet Light is used as a disinfectant Yes __ No __

    6.2 Fluoridation

    6.2.1 Fluoride chemicals used conform to AWWA standards Yes __ No __ 6.2.2 Fluoride feed equipment used is Check all that applies

    Dry Chemical feeder

     Volumetric __

     Gravimetric __

    Solution Feeder __

    Fluoride saturator __

    6.2.3 Fluoride injection point is at a point where all treated water must pass,

    such as the confluence of all filters Yes __ No __ 6.2.4 Fluoride is not fed prior to lime softening Yes __ No __ 6.2.5 Scales, loss-of-weight recorders, or liquid level indicators are provided

    Yes __ No __

    6.2.6 Fluoride feeder is accurate within 5% of the desired feed rate.

    Yes __ No __

    6.2.7 The electric outlet used for the fluoride feed pump is a non-standard

    receptacle. Yes __ No __

    6.7.8 The electrical outlet used for the fluoride feed pump is connected to the

    well pump. Yes __ No __

    6.3 Chemical Oxidation Check chemical oxidants used and there purpose 6.3.1 Chlorine ___

    6.3.1.1 Iron & Manganese removal ___

    6.3.1.2 Color removal ___

    6.3.1.3 Taste and odor control ___

    6.3.1.4 Flocculent aid ___

    6.3.2 Chlorine Dioxide ___

    6.3.2.1 Iron & manganese removal ___

    6.3.2.2 Color removal ___

    6.3.2.3 Taste and odor control ___

    6.3.3 Ozone ___

    6.3.3.1 Iron and manganese removal ___

    6.3.3.2 Color removal ___

    6.3.3.3 Taste and odor control ___

    9

6.3.4 Potassium Permanganate ___

    6.3.4.1 Iron & manganese removal ___

    6.3.4.2 Cyanide removal ___

    3.4.3 Phenol Removal ___ 6.

    6.3.4.4 Taste and odor control ___

    6.3.4.5 Color removal ___

    7.0 Plant Safety

    Chemical Storage and Handling

    7.1 Activated Carbon

    7.1.1 “No Smoking” Signs are posted where carbon is stored or handled.

    Yes __ No __

    7.1.2 Proper respiratory equipment is available for each operator Yes __ No __ 7.1.3 Carbon is stored in single or double rows with access aisles around every

    stack Yes __ No __

    7.1.4 The door to the carbon room is a self closing fire door Yes __ No __ 7.1.5 Protective clothing is used when handling carbon Yes __ No __ 7.1.6 Shower facilities are available to all operators handing carbon

    Yes __ No __

    7.1.7 Non-explosive electrical outlets and fixtures are provided in the carbon

    room. Yes __ No __

    7.2 Alum & Ferrous Sulfate

    7.2.1 Proper respiratory equipment and chemical goggles are available for each

    operator Yes __ No __

    7.2.2 Chemicals are stored in a clean dry place to avoid caking of chemicals

    from excessive moisture Yes __ No __

    7.2.3 Loose, denim-quality, dust-proof, long sleeved clothing and a bandana and

    cap with trousers tied at the ankles are worn by operators when handling

    Alum and Ferrous Sulfate. Yes __ No __

    7.2.4 Chemical solution pumps are equipped with antisplatter shields around the

    stuffing box. Yes __ No __

    7.3 Lime

    7.3.1 Proper respiratory equipment, dust goggles, and face shields are available

    for each operator. Yes __ No __

    7.3.2 Quicklime is stored in a dry place not exposed to moisture. 7.3.3 Operators wear heavy denim clothing with long sleeves, bandana, trousers

    tied around the shoe, and covers exposed skin with protective cream.

     Yes __ No __

    7.3.4 Showers are available to operators immediately after handling quicklime.

    Yes __ No __

    7.4 Fluoride

    7.4.1 Respiratory equipment, chemical goggles, rubber gloves, and protective

    clothing are worn by operators whenever handling sodium fluoride or

    sodium silicofluoride. Yes __ No __

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