(a) Unless the groundwater is monitored to satisfy the requirements
of 40 Code of Federal Regulations (CFR) §265.93(d)(4), the owner or
operator must:
(1) keep records of the analyses required in 40 CFR §265.92(c)
and (d), the associated groundwater surface elevations required in 40 CFR §265.92(e),
and the evaluations required in §335.93(b) of this title (relating to
Hazardous Waste Discharges) throughout the active life of the facility, and,
for disposal facilities, throughout the post-closure care period as well;
and
(2) report the following groundwater monitoring information
to the executive director:
(A) during the first year, when initial background concentrations
are being established for the facility, concentrations or values of the parameters
listed in 40 CFR §265.92(b)(1) for each groundwater monitoring well within
15 days after completing each quarterly analysis. The owner or operator must
separately identify for each monitoring well any parameters whose concentration
or value has been found to exceed the maximum contaminant levels listed in
Appendix III of 40 CFR Part 265.
(B) quarterly, during the initial year of groundwater monitoring,
concentrations or values of the parameters listed in 40 CFR §265.92(b)(2)
and (3) for each groundwater monitoring well. Annually thereafter, concentrations
or values of the parameters listed in 40 CFR §265.92(b)(3) for each groundwater
monitoring well, along with the required evaluations for these parameters
under 40 CFR §265.93(b). The owner or operator must separately identify
any significant differences from initial background found in the upgradient
wells, in accordance with 40 CFR §265.93(c)(1). In addition, concentration
of the groundwater quality parameters listed in 40 CFR §265.92(b)(2)
shall be reported annually.
(C) as a part of the annual report, results of the evaluation
of groundwater surface elevations under 40 CFR §265.93(f), and a description
of the response to that evaluation where applicable.
(b) If the groundwater is monitored to satisfy the requirements
of 40 CFR §265.93(d)(4), the owner or operator must:
(1) keep records of the analyses and evaluations specified
in the plan which satisfies the requirements of 40 CFR §265.93(d)(3),
throughout the active life of the facility, and, for disposal facilities,
throughout the post-closure care period as well; and
(2) annually, until final closure of the facility, submit to
the executive director a report containing the results of his groundwater
quality assessment program which includes, but is not limited to, the calculated
(or measured) rate of migration of hazardous waste or hazardous waste constituents
in the groundwater during the reporting period.
(c) The owner or operator shall submit, upon request of the
executive director, the following static information for each groundwater
monitoring well:
(1) date of well construction;
(2) total depth of well (based on mean sea level);
(3) type of well (ex. trench lysimeter, piezometer, well cluster,
multiple screen, pressure vacuum, lysimeter);
(4) latitude/longitude (based on United States Geological Survey
topographic map);
(5) geologic age of aquifer sampled;
(6) aquifer name/geologic formation and age.
(d) The owner or operator shall submit, upon request of the
executive director, the following information on each sampling event for each
groundwater monitoring well sampled:
(1) date of observation;
(2) depth to water level (based upon mean sea level);
(3) sample collection method (i.e. pumped well, bailer, probe,
air-lift pump, jetted, peristaltic pump, centrifugal pump, or pitcher pump);
(4) depth to the top of the sample interval which is measured
in the number of feet below the land surface datum (LSD);
(5) depth to the bottom of the sample interval which is measured
in feet below the LSD.
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Source Note: The provisions of this §335.117 adopted to be effective May 28, 1986, 11 TexReg 2347; amended to be effective May 20, 1999, 24 TexReg 3726; amended to be effective November 15, 2001, 26 TexReg 9135 |