Section 327IAC15-14-8. Discharge limits and monitoring and reporting requirements

   (a) The permittee must meet the discharge and monitoring requirements listed in Table 1 and this section as follows:

Table 1
The discharge shall be limited and monitored by the permittee as specified as follows:
		Daily	Daily		Monitoring	Sample
Parameter		Maximum	Minimum	Units	Frequency	Type
Effluent flow		–	–	GPD	1 X Monthly	24-Hr. Total [1]
Temperature		Report	Report	oC	2 X Annually	Grab
CBOD5		15	–	mg/l	2 X Annually	Grab
TSS		18	–	mg/l	2 X Annually	Grab
Ammonia-nitrogen		2	–	mg/l	2 X Annually	Grab
pH		9.0	6.0	s.u.	2 X Annually	Grab
Dissolved Oxygen [2]					2 X Annually	Grab
	Winter [3]	–	5.0	mg/l
	Summer [4]	–	[5]	mg/l
E. coli		235	–	colonies/100ml	1 X Quarterly	Grab
Total residual chlorine [6]
	Final	<0.06	–	mg/l	1 X Quarterly	Grab
[1] Flows may be estimated.
[2] Dissolved oxygen must be monitored once during the winter monitoring period, and once during the summer monitoring period.
[3] Winter limitations apply from December 1 through April 30 of each year.
[4] Summer limitations apply from May 1 through November 30 of each year.
[5] During the summer monitoring period, the dissolved oxygen concentration shall not be less than fifty percent (50%) of saturation as determined by Table 2 as follows:

Table 2
No one (1) sample shall be less than 4.0 mg/l.
Temp. oC	18.0	18.5	19.0	19.5	20.0	20.5	21.0	21.5	22.0	22.5	23.0	23.5	24.0	24.5	25.0	25.5	26.0
D.O. mg/l	4.703	4.654	4.606	4.559	4.513	4.467	4.422	4.378	4.335	4.293	4.251	4.210	4.169	4.129	4.090	4.051	4.012
[6] If chlorine is used as a disinfectant, the residual prior to dechlorination shall be maintained at a minimum of 0.5 mg/l at all times. Dechlorination is required such that the concentration of residual chlorine does not exceed the limit of quantification of 0.06 mg/l.

  (b) Samples and measurements required by this rule shall:

(1) be representative of the volume and nature of the monitored discharge flow;

(2) be taken at times that reflect the full range of effluent parameters normally expected to be present;

(3) be taken at times that represent seasonal variability unless otherwise approved by the commissioner;

(4) not be taken at times or in a manner to avoid showing elevated levels of any parameter; and

(5) be analyzed by a laboratory using approved methods.

  (c) The owner of an on-site residential sewage discharging disposal system shall visually inspect the system at least one (1) time each month and complete a visual inspection form provided by the department. Completed visual inspection forms shall be maintained by the owner of the system and made available for inspection by the district or IDEM. If the person inspecting the system discovers any problem in the operation or maintenance of the system, the person shall contact the district immediately.

  (d) Except as provided in subsection (h), the analytical results of monitoring required by this rule shall be reported as follows:

(1) The homeowner shall submit to the district the required analytical results on or before the twenty-eighth day of the month following the month in which the samples were collected.

(2) The district shall submit to the department on a semiannual basis the sampling results for all of the on-site residential sewage discharging disposal systems that are regulated under this rule.

(3) Monitoring results shall be submitted to the department on forms provided by the department.

  (e) The discharge from the on-site residential sewage discharging disposal system shall not cause receiving waters, including the mixing zone, to contain substances (for example, foam), materials, floating debris, oil, scum, or other pollutants that:

(1) will settle to form putrescent or otherwise objectionable deposits;

(2) are in amounts sufficient to be unsightly or deleterious;

(3) produce color, visible oil sheen, odor, or other conditions in such degree as to create a nuisance;

(4) are in amounts sufficient to be acutely toxic to or otherwise severely injure or kill aquatic life, other animals, plants, or humans; or

(5) are in concentrations or combinations that will cause or contribute to the growth of aquatic plants or algae to such a degree as to create a nuisance, be unsightly, or otherwise impair the designated uses.

  (f) The discharge from the on-site residential sewage discharging disposal system shall not cause receiving waters outside the mixing zone to contain substances in concentrations that on the basis of available scientific data are believed to be sufficient to injure, be chronically toxic to, or be carcinogenic, mutagenic, or teratogenic to humans, animals, aquatic life, or plants.

  (g) The permittee shall take all reasonable steps to minimize any adverse impact to waters of the state resulting from noncompliance with any effluent limitations specified in this permit. The commissioner may require accelerated or additional monitoring as necessary to determine the nature and impact of the noncomplying discharge.

  (h) If the results of any compliance monitoring show an exceedance of an effluent limitation under this section, a confirmation test must be conducted for each exceeded limitation no later than thirty (30) days from the date that the original sample was taken. Results of the confirmation sampling must be submitted to the district as soon as received but in no case later than seven (7) days after receipt of the sampling results. A confirmation test must be conducted every thirty (30) days until the effluent limitation is met.

  (i) If two (2) consecutive sampling results, including the confirmation samples required under subsection (h), exceed an effluent limitation, the district must submit a corrective action plan to the department within thirty (30) days of receipt of results of the second sample. The plan shall include information on corrective action taken to ensure compliance with each exceeded limitation and a plan to ensure future compliance with the limitation. (Water Pollution Control Division; 327 IAC 15-14-8; filed Dec 18, 2003, 10:39 a.m.: 27 IR 1565)