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Delaware General AssemblyDelaware RegulationsAdministrative CodeTitle 16Department of Health and Social ServicesDivision of Public HealthHealth Systems Protection (HSP)

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1.0 Purpose

These regulations protect the public health and provide for the development and protection of the potable water-supply systems of this State, provide for the classification of public water systems, require the licensing of operators of these systems, provide procedures for licensing and registration, and impose penalties for violations.

23 DE Reg. 928 (05/01/20)


2.0 Definitions

Acceptable operating experience” means active, on-site leadership in the operation of a treatment plant/distribution system of a public water supply system.

Advisory Council” means Advisory Council for Certification of Public Water System Operators, as established by this regulation.

Base-level License” means a water treatment and distribution license that covers general water system information, disinfection by hypochlorination, and distribution operation and maintenance for water supply systems having a flow of less than five hundred (500) gpm at twenty (20) psi.

Circuit rider/contract operator” means a certified water operator who serves as the direct responsible charge (DRC) for two or more public water systems under separate ownership.

Combined treatment/distribution system” means any water supply system composed of a water treatment facility together with a water distribution system as defined in this section.

Continuing education unit” or “CEU” means a measure of professional, educational training, where one CEU is equal to 10 educational contact hours of classroom or laboratory training.

Department” shall mean the Delaware Department of Health and Social Services.

Direct responsible charge” or “DRC” means (1) a certified water system operator assigned active, daily, technical direction and supervision or (2) active, daily, accountability for process control decisions of a facility/major segment of a facility that directly impacts public health or the environment. An operator must be fully licensed for one full year before designation as a DRC.

Director” means Director of the Division of Public Health or the Director’s duly authorized designee.

Distribution system” means a network of pipes, valves, fire hydrants, service lines, meters, storage tanks, finished water reservoirs and pumping stations. The system delivers water to homes, businesses, and industries for drinking water and other uses.

Division” means the Division of Public Health.

Educational contact hour” means the amount of time spent at an approved water operator or water distribution operator training course during the licensing period. One hour of time spent in a training course is equal to one educational contact hour. This does not include travel time or lodging time. For the purpose of these regulations, the initial base certification course does not qualify as educational contact hours.

Endorsement” means any water treatment operation listed in subsection 5.2.1 over and above the base-level license.

gpm” means gallons per minute.

Hands-on” means the applicant operates a water treatment plant or distribution system and has performed other tasks including but not limited to routine tests, collection of samples, and completion of operational reports. The knowledge possessed was gathered, in part, from daily operating experience, not merely from textbook study.

Leadership” means activities such as treatment plant startup and hands-on operator training.

Licensing Period” means the fixed two-year period beginning on the first day of the month after the initial license issue date and ending on the last day of the 24th month thereafter.

Operator” means the individual who has responsibility for the operation of a water treatment plant or water distribution system and any individual who normally has charge of an operating shift, or who performs process control decisions including analytical control.

Person” means corporations, companies, associations, firms, municipally-owned water utilities, partnerships, societies and joint stock companies, as well as individuals.

Process control decision” means a decision that maintains or changes the water quality or quantity of a water system in a manner that may affect the public health or the environment.

psi” means pounds per square inch.

Public water system” means a water supply system for the provision to the public of water for human consumption through pipes or other constructed conveyances either directly from the user's free-flowing outlet or indirectly by the water being used to manufacture ice, foods and beverages or that supplies water for potable or domestic purposes to employees, tenants, members, guests or the public at large in commercial offices, industrial areas, multiple dwellings or semi-public buildings including, but without limitation, rooming and boarding houses, motels, tourist cabins, mobile home parks, restaurants, hospitals and other institutions, or offers any water for sale for potable domestic purposes. A dwelling unit means one or more rooms arranged for the use of one or more individuals as a single housekeeping unit, with cooking, living, sanitary and sleeping facilities. Public water systems are classified as follows:

"Community water system” or “CWS" means a public water system which serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents.
"Non-transient non-community water system” or “NTNCWS" means a public water system that is not a community water system and regularly serves at least 25 of the same persons over six months per year.
"Transient non-community water system” or “NCWS" means a public water system which has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days out of the year.
"Miscellaneous public water system” or “MPWS" means a public water system that is neither CWS, NTNCWS, nor NCWS.

Secretary” means the Administrator of the Department of Health and Social Services of the State of Delaware as defined in 29 Del.C. §7902(a) or the Director’s duly authorized designee.

Water distribution system” means the pumps, piping, and storage facilities from the source/treatment plant to the property line of the ultimate consumer.

Water supplier” means any person who owns, operates, or manages a public water system.

Water supply system” means the work and auxiliaries for collection, treatment, storage, or distribution of water from the source of supply to the free-flowing outlet of the ultimate consumer.

Water treatment” or “treatment” means any process that is meant to alter the physical, chemical or bacteriological quality of the water.

Water treatment facility” means that portion of the water supply system that is meant to alter the physical, chemical, or bacteriological quality of the water being treated.

23 DE Reg. 928 (05/01/20)


3.0 Advisory Council for Certification Of Public Water System Operators

3.1 An Advisory Council for Certification of Public Water System Operators shall be appointed by the Secretary to advise and assist in the administration of these regulations.

3.2 Membership

3.2.1 The Advisory Council shall consist of a minimum of seven members. Membership shall consist of: One representative from the Division of Public Health who shall serve as Secretary/Treasurer, responsible for maintaining all appropriate records and conducting the daily business of the Advisory Council; One representative of the public-at-large; Two representatives of local government agencies with managerial responsibility for water treatment or water distribution in a public water system with the following representation: One representative of a local government agency having a population greater than or equal to 10,001; and One representative of a local government agency having a population less than or equal to 10,000; One representative of business or industry; One representative of a public water utility; and One representative holding a valid water operator's license, or who is eligible to be licensed under these regulations.

3.2.2 Advisory Council members shall serve a five-year term or until such time as a re-appointment or a replacement appointment is made. Members shall have the right to resign at their request. The Division representative will serve an unlimited term at the discretion of the Secretary.

3.2.3 Advisory Council appointees shall represent all counties of the State, with at least one member each representing New Castle, Kent, and Sussex Counties.

3.2.4 The Advisory Council shall elect a Chair from among the members.

3.2.5 The Secretary may remove any member of the Advisory Council for misconduct, incapacity, or neglect of duty, and shall be the sole judge of the justification for removal.

3.2.6 The Secretary shall fill any vacancy. Such an interim appointment shall be for the duration of the term.

3.3 The Advisory Council shall hold at least four meetings each calendar year and such special meetings as it deems necessary.

3.3.1 A majority of the Advisory Council membership in attendance at any meeting shall constitute a quorum of the Advisory Council.

3.4 Responsibility and Authority

3.4.1 The Advisory Council, with the consent of the Secretary, shall establish such procedures and guidelines as may be necessary for the administration of this regulation. These procedures and guidelines shall include but not be limited to the following: Procedures for examination of applicants and the granting of licenses; Procedures for the renewal of licenses; Procedures for the suspension, revocation, and failure to renew licenses; Guidelines for evaluating equivalency of training and examinations conducted by recognized agencies and institutions; Guidelines for evaluating equivalency of other licensing and certification programs for the purpose of according reciprocal treatment; and Procedures for the collection and disbursement of fees.

3.4.2 The Advisory Council shall possess the necessary authority as delegated by the Secretary to carry out all activities required for the proper administration of these regulations. Such authority includes: The development of rules and regulations, to be adopted by the Secretary, concerning the licensing of operators of public water systems; Establishing the method of examination for each license applicant, including preparation, administration, and grading of examinations; The recommendation to the Secretary regarding the issuance and renewal of licenses; and The recommendation of disciplinary sanctions to the Secretary on operators who violate Section 11.0 of these regulations.

23 DE Reg. 928 (05/01/20)


4.0 License Requirements for Public Water Systems

4.1 Water Supply Treatment Operators. A public water system treatment facility must be under the operation of a DRC.

4.2 Water Supply Treatment Facility Operators. It shall be a violation of these regulations for any person to be a DRC or operate any public water system treatment facility unless they possess a valid base-level license and applicable endorsements, if any, for the treatment facility to be operated.

4.3 Water Supply Distribution Systems. A public water distribution system, capable of producing greater than 500 gpm at 20 psi must be under the operation of a DRC possessing, at a minimum, a distribution endorsement.

4.4 Water Supply Distribution System Operators. It shall be a violation of these regulations for any person to be a DRC or operate any public water distribution system capable of producing greater than 500 gpm at 20 psi unless they possess a valid base-level license and, at a minimum, a distribution endorsement.

4.5 Combined Treatment/Distribution Supply Systems

4.5.1 The license requirements stipulated in subsections 4.1 and 4.3 apply separately and equally to the water supply treatment facility operator and the water supply distribution facility operator of a combined treatment/distribution supply system.

4.5.2 A water supply treatment facility that is part of a combined public water treatment/distribution system must be operated by a DRC.

4.5.3 A water supply distribution system that is part of a combined public water treatment/distribution system capable of producing greater than 500 gpm at 20 psi, must be under the DRC of a person possessing a valid base-level license and, at a minimum, a distribution endorsement.

4.5.4 The requirement of a distribution endorsement as stated in subsection 4.5.3 may be waived if the owner demonstrates to the Division that the operation and maintenance of the water system is contracted out to another licensed operator.

4.6 An owner of a public water system treatment facility, distribution system, or combined treatment/distribution system must provide the Division a list of all persons in DRC and all operators who have been duly licensed under these regulations.

4.6.1 The owner must notify the Division, in writing, of any addition, deletion, or other change in the number of licensed DRCs by the close of business the next business day after such change. The notification must include the name and license number of the new DRC.

4.7 Temporary Variance

4.7.1 The Secretary may grant a temporary variance from the license requirements listed in subsections 4.1, 4.3 and 4.5 of this regulation, upon recommendation by the Advisory Council, to the owner of a public water system treatment facility, distribution system, or combined treatment/distribution system, when it is demonstrated to the satisfaction of the Advisory Council that the owner has unexpectedly lost a licensed operator and is unable to hire a licensed operator in spite of good faith efforts. The temporary variance may be issued with any special conditions or requirements deemed necessary to assure the protection of the public health. Owner must notify the Division of the unexpected loss of a licensed operator within 30 days pursuant to subsection 4.6. Owner must apply for the temporary variance no later than 30 days after loss of an operator. The Secretary shall notify the applicant in writing of the decision to approve or deny the temporary variance once the Advisory Council reviews the application and any other pertinent materials and makes a recommendation to the Secretary.

4.7.2 A temporary variance shall be valid only for that facility or system for which it is issued and for a period of time as specified by the Secretary, not to exceed six months.

4.7.3 The Secretary may extend a temporary variance when the owner demonstrates the owner has continued to act in good faith in attempting to hire a licensed operator but is unable to do so. The Secretary may grant one extension of the original variance, upon recommendation by the Advisory Council, for a period of time not to exceed six months. Owners must request an extension of a temporary variance to the Advisory Council in writing no later than one month prior to the expiration of the original variance.

23 DE Reg. 928 (05/01/20)


5.0 Classification of Public Water Systems

5.1 The Division shall classify all public water systems in accordance with the criteria hereby established.

5.2 Water Supply Facilities

5.2.1 Public water system supply facilities shall be classified according to the treatment processes they operate. General treatment processes shall be grouped into categories hereby called endorsements. Specific unit processes within each endorsement shall be called endorsement sub-categories. A list of the endorsements and endorsement sub-categories is attached hereto as Appendix A.

5.2.2 Public water systems shall have, at minimum, a DRC who has obtained the endorsements and endorsement sub-categories consistent with treatment and distribution processes utilized by the water system. The endorsements are as follows: Disinfection; Chemical feed; Filtration; Surface water operations; Other specified treatment; Distribution; and Approved sampler/tester.

5.2.3 Appendix A may be amended depending on industry changes in treatment technologies.

5.2.4 In the event of an emergency, for which a treatment process is required to provide immediate public health protection and for which the DRC or operator is currently not licensed, the Division may grant approval to add an emergency endorsement to the DRC's or operator's license. Emergency endorsements shall be issued for a period not to exceed one year. The operator must pass the appropriate endorsement examination within the one-year period of the emergency endorsement.

5.3 The Division shall provide a classification system for distribution system operators, when the holder of this classification is responsible for oversight of a distribution system and has no responsibilities for operations at the treatment plant.

23 DE Reg. 928 (05/01/20)


6.0 License Classification and Operator Qualifications

6.1 License Classification

6.1.1 Base-level water supply operator with all applicable endorsements as stated in subsection 5.2.1 is hereby established.

6.1.2 Four specialty class licenses are also established: Operator-in-training (OIT) license; Grandfather clause license; Limited license; and Distribution license.

6.2 Operator Qualifications

6.2.1 Base-level water supply operator qualifications shall be: High School Diploma or equivalent and one year of acceptable operating experience; or three years of acceptable operating experience; and Successful completion of the base-level license written examination.

6.2.2 A water treatment OIT who lacks either the education or experience requirements for a base-level license may receive an interim OIT license for a maximum of one year, pending fulfillment of the regular license requirements. The interim OIT license depends on approval by the Secretary, recommendation by the Advisory Council, and successful completion of the base-level license written examination. An OIT licensee must be employed at a water system performing the duties of an operator consistent with the definition of operator in these regulations continuously for one year before becoming eligible for a base-level license. An applicant that passes the base-level license examination or distribution license examination must obtain employment with a Delaware community water system or non-transient non-community water system within two years of passing the examination. Failure to obtain employment within the two-year period will require retaking the appropriate examination and submittal of a new application with the applicable fee. An OIT licensee must submit an application for a base-level license 30 days prior to the expiration of the OIT license in order to be eligible for a base-level license.

6.2.3 An operator who works for a non-transient non-community water system that is required to have a licensed operator may obtain a limited license. A limited license shall not be transferable to another public water system. To obtain a limited license an operator must attend a course approved by the Division and pass the examination. At the discretion of the Division, a limited license operator may be required to obtain endorsements for treatment and distribution processes used by the facility in the time frame set by the Division. To renew a limited license, a limited license operator must obtain the required number of continuing education units in accordance with subsection 7.3.2 and submit an application with the applicable fee.

6.2.4 A distribution system operator may obtain a distribution license when they are responsible for oversight of a distribution system and have no responsibilities for operations at the treatment plant. The qualifications for a distribution license shall include: A high school diploma or equivalent and one year of acceptable operating experience, or three years of acceptable operating experience; and Successful completion of the distribution license written examination.

6.2.5 A circuit rider/contract operator must meet the following requirements: Obtain certification for all endorsements required for the water systems for which the circuit rider/contract operator is in direct responsible charge or operates. Complete three weekly visits at each water system that provides any treatment and make at least one weekly visit for each system that has no treatment. The Advisory Council may adjust this number upon written request from the operator or owner of the water system justifying the requested change. The number of weekly visits at each water system must be documented on forms approved by the Division and made available upon request. Information documented shall include, but not be limited to, the name of the water system, name of the operator, date of visit, time of visit, and activities performed. For the purposes of this subsection, a DRC circuit rider/contract operator must be available in the event of an emergency to provide timely assistance that adequately addresses the emergency.

6.2.6 The Secretary shall not issue new grandfather clause licenses except for the license renewal of current grandfather clause licensees.

6.2.7 An applicant for any endorsements or sub-endorsements must have a minimum of one year of acceptable operating experience with the treatment process or distribution system in order to receive the endorsement on the license. Applicants that pass the endorsement examination, in accordance with subsection 7.1.1, may receive an OIT license for up to one year in order to obtain the necessary experience.

23 DE Reg. 928 (05/01/20)


7.0 Licensing Procedures

7.1 The Division may enter into a contract with a third party to prepare, administer, and grade written examinations required for each category and classification of license.

7.1.1 A minimum score of 75 percent shall be considered passing.

7.1.2 Examinations are confidential and remain the property of the Advisory Council.

7.1.3 The Advisory Council may waive the requirements for the written examination, due to unusual and extenuating circumstances, and allow a recorded examination conducted and retained by the Advisory Council.

7.1.4 The Advisory Council shall designate the locations and times for examinations to be held and provide notification at least two months prior to the scheduled examination date. Examinations shall be held in January and June of each year.

7.1.5 Applicants must register with the Division a minimum of 30 days prior to the announced date of any licensing examination. The Division shall produce registration forms available to the public. The registration form shall not require personal references, a picture of the applicant, or information relating to citizenship, place of birth, or length of State residency.

7.1.6 Upon successful completion of the examination, applicants must meet all current requirements for licensure and submit an application to the Advisory Council with the applicable fee. Any applicant that fails to submit an application with the applicable fee within 90 days of the first notification indicating they passed the examination must retake the examination and submit a new application with the applicable fee to the Advisory Council.

7.1.7 If an application is refused or rejected, an applicant may appeal in writing via certified mail to the Secretary within 30 days of receiving such notification. Any applicant who failed the examination has the right to an appeal before the Advisory Council.

7.1.8 Any applicant who fails to pass an examination may apply for re-examination. Applicants may sit for the same examination two times within a one-year period. Applicants who fail twice within a one-year period must wait one year before sitting for another examination.

7.2 Once an applicant satisfies requirements provided in this regulation and provides proof of employment with acceptable operating experience at a Delaware non-transient non-community water system or community water system, the applicant, upon recommendation by the Advisory Council, shall be issued a suitable license by the Secretary. The license shall indicate all endorsements for which the licensee is qualified, the date of issuance, and the date of expiration.

7.3 Renewal of License. It is the responsibility of the licensee to file a renewal application with the Advisory Council. The Advisory Council is not required to notify licensees of expiration dates.

7.3.1 Licenses shall be renewed every two years unless suspended, revoked for cause, or inactivated under subsection 7.4. Applications for renewal must be submitted to the Advisory Council on the forms provided by the end of the licensing period. Applications for renewal postmarked after the end of the licensing period will be considered late.

7.3.2 All licensees must obtain 20 educational contact hours every two years to be eligible to renew their license. OIT licensees may accrue educational contact hours during their OIT License period and, upon completion of their first base-level license period, apply them toward their base-level license renewal. A minimum of 10 educational contact hours must be obtained in classes of a technical nature, directly related to waterworks operation, treatment, or distribution. Operators are eligible to receive one educational contact hour, not directly related to waterworks operation, treatment, or distribution, for general attendance to a conference hosted by a nationally recognized organization related to drinking water and approved by the Division with proof of attendance as required by the Division. Operators are eligible to receive one educational contact hour, not directly related to waterworks operation, treatment, or distribution, for each attendance to a regular meeting held by the Advisory Council, not to exceed four per year. Educational contact hours are required of all licensees and shall be completed prior to the time a license is to be renewed. Extra educational contact hours do not carry over to the next licensing period. Licensees will only get educational contact hour credit for their first attendance of approved courses during each licensing period. Licensees may retake an approved course in the same licensing period but will not receive additional educational contact hour credit.

7.3.3 Any license that has not been renewed in accordance with subsections 7.3.1 and 7.3.2 shall be automatically inactivated. A license may be reactivated without examination upon payment of the applicable fee and verification of completion of continuing education requirements within one year from the end of the licensing period. Licensees who do not reinstate within one year of the expiration date must submit a new application to the Advisory Council and successfully complete the applicable written examinations to renew their licenses. Continuing education units may be earned during the period of inactivation if the applicant does not have the required number of CEUs for renewal. CEUs earned during periods of inactivation do not carry over to the two-year term of the renewed license.

7.4 The Secretary may suspend or revoke the license of an operator after considering the recommendations of the Advisory Council when it is found that the operator has practiced fraud or deception; failed to use reasonable care, judgment, or the application of knowledge or ability in the performance of duties; or is incompetent or unable to perform duties properly.

7.4.1 The Advisory Council’s recommendation to the Secretary shall be made after conducting a hearing in accordance with provisions established under these regulations. Denial of renewal, suspension, or revocation of a license or placement on probation may result from actions that pose a significant or immediate public health risk and may include malfeasance, misfeasance, and nonfeasance.

7.5 Fees

7.5.1 A licensure fee as authorized by 16 Del.C. §122(3)(c) shall be assessed for initial and renewal licensures.

7.6 The Division may grant reciprocity and issue a license without examination to an applicant who holds a certificate or license in any state, territory, or possession of the United States or any country.

7.6.1 Reciprocity will be granted if, in the judgment of the Secretary, the requirements under which the certification or license was issued do not conflict with the provisions of these regulations or any rules promulgated hereunder, and are of a standard not lower than that specified by these regulations.

7.7 A licensee with an active license may request in writing to be placed on inactive status. Inactive status can be renewed electronically on a biennial basis by attestation with supporting documentation of completing the required continuing education for licensure. Inactive licensees may reactivate their license by submitting a written request to the Advisory Council with payment of the applicable fee as set by the Division.

7.7.1 An operator is not authorized to work as a licensed operator in this State during the period of inactive status.

23 DE Reg. 928 (05/01/20)


8.0 Statement of Ethics

It is the responsibility of all operators to ensure the provision of safe drinking water to their customers by maintaining their license, ensuring they obtain relevant training, keeping up with all current and proposed regulations, maintaining accurate records, and addressing customer complaints in a timely manner.

23 DE Reg. 928 (05/01/20)


9.0 Preemption

The provisions of these regulations preempt existing prior regulations of this State insofar as they relate to or conflict with the provisions of this regulation.


10.0 Severability

In the event any particular clause or section of these regulations should be declared invalid or unconstitutional by any court of competent jurisdiction, the remaining portions shall remain in full force and effect.


11.0 Disciplinary Procedures

11.1 Grounds for Discipline. An applicant or licensee may be subject to disciplinary sanctions if the applicant or licensed operator has:

11.1.1 Acted fraudulently or with material deception in order to be certified;

11.1.2 Engaged in illegal, incompetent or negligent conduct in the provision of water system operation;

11.1.3 As an operator or otherwise, in the practice of his or her profession, engaged in an act of consumer fraud or deception, or engaged in the restraint of competition, or participated in price-fixing activities; or

11.1.4 Violated a lawful provision of these regulations.

11.2 Disciplinary Sanctions. Persons regulated under this Section who have been determined to be in violation of these regulations may be subject to one or more of the following disciplinary actions:

11.2.1 Issuance of a letter of reprimand;

11.2.2 Placement on probationary status;

11.2.3 Imposition of a fine not to exceed $1,000 for each offense;

11.2.4 Suspension of license; or

11.2.5 Revocation of license.

11.3 Disciplinary Procedures

11.3.1 The Advisory Council may, upon sworn complaint or upon its own initiative, conduct an investigation to determine whether a licensee has engaged in any activity requiring disciplinary action.

11.3.2 Upon completion of the investigation, the Advisory Council shall forward a copy of the investigation report along with its recommendation to the Secretary. The Secretary shall set the time and place for the hearing.

11.3.3 The Secretary shall cause a copy of the charges, together with a notice of the time and place set for the hearing, to be served on the alleged licensee 30 days before the date of the hearing. In cases where the licensee cannot be located or where personal service cannot be affected, substitute service shall be affected in the same manner as with civil litigation.

11.3.4 In all proceedings herein: The licensee may be represented by counsel who shall have the right of examination and cross-examination. The licensee and the Secretary may subpoena witnesses and admit documentary evidence on their own behalf. Subpoenas shall be issued by the Department upon written request and shall be served as provided by the rules of the Superior Court and shall have like effect as a subpoena issued by said Court. Testimony before the Secretary shall be under oath. The Secretary shall have power to administer oaths for this purpose. A stenographic record of the hearing shall be made by a qualified court reporter. At the request and expense of any party, such record shall be transcribed with a copy to the other party. The decision of the Secretary shall be based upon sufficient legal evidence. If the charges are supported by such evidence, the Secretary may revoke, refuse to issue or suspend a license, or otherwise discipline the licensee. Upon reaching their conclusion of law and determining an appropriate disciplinary action, if any, the Secretary shall issue a written decision and order in accordance with 29 Del.C. §10128. The order must restate the factual findings, but need not summarize the evidence presented. However, notwithstanding the provisions of 29 Del.C. §10128(c), the decision and order may be issued over the signature of only the Secretary. The decision and order must be sent by certified mail with return receipt requested to the licensee with a copy to the Director of the Division of Public Health. A suspended license may be reinstated upon further review by the Secretary at the request of the licensee. As a condition of reinstatement of a suspended license, the Agency in consultation with the Advisory Council may impose any condition or conditions including but not limited to a requirement to take an examination. Before reinstating a suspended license, the Secretary shall, without a hearing, make a determination as to whether the licensee has taken the required corrective actions and has satisfied all the conditions imposed pursuant to the suspension. A licensee who disagrees with a determination made by the Secretary may request a hearing before the Secretary. The written request must be made 10 days from the date of the decision. All decisions of the Secretary shall be final and conclusive. Where the licensee is in disagreement with the action of the Secretary, the licensee may appeal the Secretary’s decision to the Superior Court within 30 days of service or of the postmarked date of the copy of the decision mailed to the practitioner. The appeal shall be on the record to the Superior Court and shall be as provided in §§10142-10145 of Title 29.

11.4 Reapplication of License after Revocation. An operator that has had a license revoked by the Secretary may submit an application to the Advisory Council for renewal of the license. An application for a license after revocation shall not be submitted for at least one year after the date of revocation.

23 DE Reg. 928 (05/01/20)


12.0 Penalty Clause

Any person who neglects or fails to comply with these regulations shall be subject to penalty as provided in 16 Del.C. §122(3)(c).

23 DE Reg. 928 (05/01/20)


Listed below are the general endorsement categories. Under each general category is a list of the endorsement sub-categories (unit processes) associated with each general category.

A. Disinfection

1. Hypochlorination (Calcium or Sodium), powder or liquid

2. Gas Chlorination

3. Ozonation

4. [Reserved]

5. [Reserved]

6. Chloramines

7. Chlorine Dioxide

8. Ultraviolet Light

B. Chemical Feed

1. Lime - Soda Ash Addition

2. pH Adjustment

3. Inhibitor - bimetallic phosphate, hexametaphosphate, orthophosphate, polyphosphate

4. Sequestering

5. Permanganate

6. [Reserved]

7. Fluoridation

C. Filtration

1. Activated Carbon, powder or granulated

2. Sand - Pressure, Rapid, Slow

3. Reverse Osmosis

4. Greensand

5. Activated Alumina

6. Ion Exchange

7. Cartridge

8. [Reserved]

9. Ultrafiltration

10. Microfiltration

D. Surface Water Operations

1. Algae Control

2. Coagulation

3. Flocculation

4. Rapid Mix

5. Sedimentation

6. Sludge Treatment

E. Other Specified Treatment

1. Aeration - Cascade, Diffused, Packed Tower, Slat Tray or Spray

2. Dechlorination - using reducing agents, sodium bisulfate, sodium sulfide, or sulfur dioxide

3. Distillation

4. [Reserved]

5. Electrodialysis

F. Distribution

1. Flow less than 500 gpm at 20 psi

2. Flow greater than 500 gpm at 20 psi

G. Approved Sampler/Tester

8 DE Reg. 453 (09/01/04)

17 DE Reg. 924 (03/01/14)

23 DE Reg. 928 (05/01/20)


Last Updated: November 29 2023 15:02:54.
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