Frequency of sampling and equipment checks
 20. (1) If this Regulation requires at least one water sample to be taken every week and tested for a parameter, the owner and operator of the small drinking water system shall ensure that at least one sample that is taken during a week for the purpose of being tested for that parameter is taken at least five days, and not more than 10 days, after a sample was taken for that purpose in the previous week.  O. Reg. 319/08, s. 20 (1). (2) If this Regulation requires at least one water sample to be taken every two weeks and tested for a parameter, the owner and operator of the small drinking water system shall ensure that at least one sample that is taken during a two-week period for the purpose of being tested for that parameter is taken at least 10 days, and not more than 20 days, after a sample was taken for that purpose in the previous two-week period.  O. Reg. 319/08, s. 20 (2). (3) If this Regulation requires at least one water sample to be taken every month and tested for a parameter, the owner and operator of the small drinking water system shall ensure that at least one sample that is taken during a month for the purpose of being tested for that parameter is taken at least 20 days, and not more than 40 days, after a sample was taken for that purpose in the previous month.  O. Reg. 319/08, s. 20 (3). (4) If this Regulation requires at least one water sample to be taken every two months and tested for a parameter, the owner and operator of the small drinking water system shall ensure that at least one sample that is taken during a month for the purpose of being tested for that parameter is taken at least 40 days, and not more than 80 days, after a sample was taken for that purpose in the previous month.  O. Reg. 319/08, s. 20 (4). (5) If this Regulation requires at least one water sample to be taken every three months and tested for a parameter, the owner and operator of the small drinking water system shall ensure that at least one sample that is taken during a three-month period for the purpose of being tested for that parameter is taken at least 60 days, and not more than 120 days, after a sample was taken for that purpose in the previous three-month period.  O. Reg. 319/08, s. 20 (5). (6) If this Regulation requires at least one water sample to be taken every 12 months and tested for a parameter, the owner and operator of the small drinking water system shall ensure that at least one sample that is taken during a 12-month period for the purpose of being tested for that parameter is taken not more than 30 days before or after the first anniversary of the day a sample was taken for that purpose in the previous 12-month period.  O. Reg. 319/08, s. 20 (6). (7) If this Regulation requires at least one water sample to be taken every 36 months and tested for a parameter, the owner and operator of the small drinking water system shall ensure that at least one sample that is taken during a 36-month period for the purpose of being tested for that parameter is taken not more than 60 days before or after the third anniversary of the day a sample was taken for that purpose in the previous 36-month period.  O. Reg. 319/08, s. 20 (7). (8) If this Regulation requires at least one water sample to be taken every 60 months and tested for a parameter, the owner and operator of the small drinking water system shall ensure that at least one sample that is taken during a 60-month period for the purpose of being tested for that parameter is taken not more than 90 days before or after the fifth anniversary of the day a sample was taken for that purpose in the previous 60-month period.  O. Reg. 319/08, s. 20 (8). (9) This section applies, with necessary modifications, if this Regulation requires equipment to be checked at intervals to which any of subsections (1) to (8) apply.  O. Reg. 319/08, s. 20 (9).