(A) The owner or operator shall obtain and
analyze samples from the installed ground water monitoring system. The owner or
operator shall develop and follow a ground water sampling and analysis plan.
The owner or operator shall keep this plan at the facility. The plan shall
include procedures and techniques for:
(2)
Sample preservation and shipment
.
;
(3)
Analytical procedures
.
; and
(4)
Chain of custody control.
[Comment: See Ohio EPA's "Technical Guidance Manual (TGM) for
Hydrogeologic Investigations and Ground Water Monitoring" for discussions of
sampling and analysis procedures. See rule
3745-50-11
of the Administrative Code titled "Incorporated by reference" for information
on accessing this document.]
(B) The owner or operator shall determine the
concentration or value of the following parameters in ground water samples in
accordance with paragraphs (C) and (D) of this rule:
(1) Parameters characterizing the suitability
of the ground water as a drinking water supply, as specified in the table in
this rule.
(2) Parameters
establishing ground water quality:
(a)
Chloride.
(b) Iron.
(c) Manganese.
(d) Phenols.
(e) Sodium.
(f) Sulfate.
[Comment: These parameters are to be used as a basis for
comparison in the event a ground water quality assessment is required under
paragraph (D) of rule
3745-65-93
of the Administrative Code.]
(3) Parameters used as indicators of ground
water contamination:
(a) pH.
(b) Specific conductance.
(c) Total organic carbon.
(d) Total organic
halogen.
(C)
For:
(1)
All
For all
monitoring wells, the owner or operator shall establish initial background
concentrations or values of all parameters specified in paragraph (B) of this
rule. The owner or operator shall do this quarterly for one year.
(2)
Each
For each of the indicator parameters specified in
paragraph (B)(3) of this rule, at least four replicate measurements shall be
obtained for each sample and the initial background arithmetic mean and
variance shall be determined by pooling the replicate measurements for the
respective parameter concentrations or values in samples obtained from
upgradient wells during the first year.
(D) After the first year, all monitoring
wells shall be sampled and the samples analyzed with the following frequencies:
(1) Samples collected to establish ground
water quality shall be obtained and analyzed for the parameters specified in
paragraph (B)(2) of this rule at least annually.
(2) Samples collected to indicate ground
water contamination shall be obtained and analyzed for the parameters specified
in paragraph (B)(3) of this rule at least semi-annually.
(E) Elevation of the ground water surface at
each monitoring well shall be determined each time a sample is obtained.
Table: Parameters Characterizing
the Suitability of the Ground Water As A Drinking Water Supply
|
Parameter
|
Maximum Level milligrams per liter (mg/L)
|
|
Arsenic
|
0.01
|
|
Barium
|
2.0
|
|
Cadmium
|
0.005
|
|
Chromium
|
0.1
|
|
Fluoride
|
4.0
|
|
Lead
|
0.015
|
|
Mercury
|
0.002
|
|
Nitrate (as N)
|
10.0
|
|
Selenium
|
0.05
|
|
Silver
|
0.01
|
|
Endrin
|
0.002
|
|
Lindane
|
0.0002
|
|
Methoxychlor
|
0.04
|
|
Toxaphene
|
0.003
|
|
2,4-D
|
0.07
|
|
2,4,5-TP (Silvex)
|
0.05
|
|
Radium
|
5 picoCuries per liter (pCi/L)
|
|
Gross Alpha
|
15 pCi/L
|
|
Gross Beta
|
4 pCi/L
|
|
Turbidity
|
5 nephelometric turbidity units (NTU)
|
|
Coliform Bacteria
|
no fecal at all; 5 per cent of all other
|
[Comment: For dates of non-regulatory government publications,
publications of recognized organizations and associations, federal rules, and
federal statutory provisions referenced in this rule, see rule
3745-50-11
of the Administrative Code titled "Incorporated by
reference."]
Notes
Ohio Admin. Code
3745-65-92
Effective:
10/23/2022
Five Year Review (FYR) Dates:
7/20/2022 and
07/20/2027
Promulgated
Under:
119.03
Statutory Authority:
3734.12
Rule Amplifies:
3734.12
Prior Effective Dates: 04/15/1981, 01/07/1983, 12/30/1989,
04/01/1990, 11/11/1999, 03/13/2002, 12/07/2004,
03/24/2017
