16 Del. Admin. Code § 4462-5.0

Current through Register Vol. 28, No. 7, January 1, 2025

Section 4462-5.0 - Record Maintenance:

5.1 Retaining Records:

5.1.1 Effective upon the adoption of these regulations, any owner or operator of a PWS shall accumulate and make available to the Division within the time stated the following records which shall be retained on the premises or at a convenient location:

5.1.1.1 Records of microbiological analyses and turbidity analyses made pursuant to these regulations shall be kept for not less than five (5) years.

5.1.1.2 Chemical analyses records for not less than ten (10) years.

5.1.1.3 Actual laboratory reports may be kept, or data may be transferred to tabular summaries, or scanned copies of results, provided that the following information is included:

5.1.1.3.1 The date, place and time of sampling and the name of the person who collected the sample;

5.1.1.3.2 Identification of the sample as to whether it was a routine distribution system sample, check sample, raw or process water sample or other special purpose sample;

5.1.1.3.3 Date of analysis;

5.1.1.3.4 Laboratory and person responsible for performing analysis;

5.1.1.3.5 The analytical technique/method used and;

5.1.1.3.6 The results of the analysis.

5.1.1.4 Records of action taken by the system to correct violations of PMCL regulations shall be kept for a period not less than three (3) years after the last action taken with respect to the particular violation involved.

5.1.1.5 Reports, summaries and communications relating to sanitary surveys shall be kept for a period not less than ten (10) years after completion of the sanitary survey of the system conducted by the system itself, by a private consultant or by any local, State or Federal agency.

5.1.1.6 Copies of monitoring plans developed pursuant to these regulations shall be kept for the same period of time as the records of analyses taken under the plan are required to be kept under subsection 5.1.1.1 except as specified elsewhere in these regulations.

5.1.1.7 Copies of Public Notices, Consumer Confidence Reports, the certifications for each, and any decisions by the Division relating to the Public Notice shall be kept for five (5) years.

5.1.1.8 Any decisions made pursuant to the provisions of Sections 14.0 and 15.0.

5.1.1.8.1 IDSE monitoring plans, plus any modifications required by the Division, must be kept until replaced by approved IDSE reports.

5.1.1.8.2 IDSE reports and 40/30 certifications, plus any modifications required by the Division, must be kept until replace or revised in their entirety.

5.1.1.8.3 Operational evaluations submitted by a system must be kept for 10 years following submission.

5.2 Records Kept by Division:

5.2.1 Records of microbiological analyses of repeat or special samples shall be retained for not less than one (1) year in the form of actual laboratory reports or in an appropriate summary form. Records of each of the following decisions made pursuant to the total coliform provisions shall be made in writing and retained by the Division.

5.2.1.1 Records of the following decisions must be retained for five (5) years:

5.2.1.1.1 Any decision to waive the twenty-four (24) hour time limit for collecting repeat samples after a total coliform positive routine sample if the public water system has a logistical problem in collecting the repeat sample that is beyond the system's control, and what alternative time limit the system must meet.

5.2.1.1.2 Any decision to allow a system to waive the requirement for five (5) routine samples the month following a total coliform-positive sample. If the waiver decision is made, the record of the decision must contain all items listed in that paragraph.

5.2.1.1.3 Any decision to invalidate a total coliform-positive sample. If the decision to invalidate a total coliform positive sample is made, the record of the decision must contain all the items in that paragraph.

5.2.1.2 Records of each of the following decisions must be retained in such a manner so that each system's current status may be determined:

5.2.1.2.1 Any decision to reduce the total coliform monitoring frequency for a CWS serving one thousand (1000) persons or fewer, that has no history of total coliform contamination in its current configuration and had a sanitary survey conducted within the last five (5) years showing that the system is supplied solely by a protected ground water source and is free of sanitary defects, to less than once per month and what the reduced monitoring frequency is. A copy of the reduced monitoring frequency must be provided to the system.

5.2.1.2.2 Any decision to reduce the total coliform monitoring frequency for a NCWS using only ground water and serving one thousand (1000) persons or fewer to less than once per quarter, and what the reduced monitoring frequency is. A copy of the reduced monitoring frequency must be provided to the system.

5.2.1.2.3 Any decision to reduce the total coliform monitoring frequency for a NCWS using only ground water and serving more than one thousand (1000) persons during any month the system serves one thousand (1000) persons or fewer. A copy of the reduced monitoring frequency must be provided to the system.

5.2.1.2.4 Any decision to waive the twenty-four hour limit for taking a total coliform sample for a PWS which uses surface water, or ground water under the influence of surface water, and which does not practice filtration, and which measures a source water turbidity level exceeding one (1) NTU near the first service connection.

5.2.1.2.5 Any decision that a NCWS is using only protected and disinfected ground water and therefore may reduce the frequency of its sanitary survey to less than once every five (5) years and what that frequency is. A copy of the reduced frequency must be provided to the system.

5.2.1.2.6 A list of agents other than the Division, if any, approved by the Division to conduct sanitary surveys.

5.2.1.2.7 Any decision to allow a PWS to forgo fecal coliform or E. coli testing on a total coliform positive sample if that system assumes that the total coliform positive sample is fecal coliform positive or E. coli positive.

16 Del. Admin. Code § 4462-5.0

24 DE Reg. 794(2/1/2021)
24 DE Reg. 904( 4/1/2021) (Errata)