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TITLE 30ENVIRONMENTAL QUALITY
PART 1TEXAS COMMISSION ON ENVIRONMENTAL QUALITY
CHAPTER 335INDUSTRIAL SOLID WASTE AND MUNICIPAL HAZARDOUS WASTE
SUBCHAPTER EINTERIM STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, OR DISPOSAL FACILITIES
RULE §335.117Recordkeeping and Reporting

(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.


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

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