Section 11-264-98 - Detection monitoring program An owner or operator required to establish a detection monitoring program under this subchapter must, at a minimum, discharge the following responsibilities:
(a) The owner or operator must monitor for indicator parameters (e.g., specific conductance, total organic carbon, or total organic halogen), waste constituents, or reaction products that provide a reliable indication of the presence of hazardous constituents in ground water. The director will specify the parameters or constituents to be monitored in the facility permit, after considering the following factors: (1) The types, quantities, and concentrations of constituents in wastes managed at the regulated unit;(2) The mobility, stability, and persistence of waste constituents or their reaction products in the unsaturated zone beneath the waste management area;(3) The detectability of indicator parameters, waste constituents, and reaction products in ground water; and(4) The concentrations or values and coefficients of variation of proposed monitoring parameters or constituents in the ground-water background.(b) The owner or operator must install a ground-water monitoring system at the compliance point as specified under section 11-264-95. The ground-water monitoring system must comply with paragraph 11-264-97(a)(2), and subsections 11-264-97(b) and (c).(c) The owner or operator must conduct a ground-water monitoring program for each chemical parameter and hazardous constituent specified in the permit pursuant to subsection (a) in accordance with 11-264-97(g). The owner or operator must maintain a record of ground-water analytical data as measured and in a form necessary for the determination of statistical significance under subsection 11-264-97(h).(d) The director will specify the frequencies for collecting samples and conducting statistical tests to determine whether there is statistically significant evidence of contamination for any parameter or hazardous constituent specified in the permit under subsection (a) in accordance with subsection 11-264-97(g). A sequence of at least four samples from each well (background and compliance wells) must be collected at least semi-annually during detection monitoring.(e) The owner or operator must determine the ground-water flow rate and direction in the uppermost aquifer at least annually.(f) The owner or operator must determine whether there is statistically significant evidence of contamination for any chemical parameter of hazardous constituent specified in the permit pursuant to subsection (a) at a frequency specified under subsection (d). (1) In determining whether statistically significant evidence of contamination exists, the owner or operator must use the method(s) specified in the permit under subsection 11-264-97(h). These method(s) must compare data collected at the compliance point(s) to the background ground-water quality data.(2) The owner or operator must determine whether there is statistically significant evidence of contamination at each monitoring well as the compliance point within a reasonable period of time after completion of sampling. The director will specify in the facility permit what period of time is reasonable, after considering the complexity of the statistical test and the availability of laboratory facilities to perform the analysis of ground-water samples.(g) If the owner or operator determines pursuant to subsection (f) that there is statistically significant evidence of contamination for chemical parameters or hazardous constituents specified pursuant to subsection (a) at any monitoring well at the compliance point, he or she must: (1) Notify the director of this finding in writing within seven days. The notification must indicate what chemical parameters or hazardous constituents have shown statistically significant evidence of contamination;(2) Immediately sample the ground water in all monitoring wells and determine whether constituents in the list of Appendix IX of chapter 11-264 are present, and if so, in what concentration.(3) For any Appendix IX compounds found in the analysis pursuant to paragraph (g)(2), the owner or operator may resample within one month and repeat the analysis for those compounds detected. If the results of the second analysis confirm the initial results, then these constituents will form the basis for compliance monitoring. If the owner or operator does not resample for the compounds found pursuant to paragraph (g)(2), the hazardous constituents found during this initial Appendix IX analysis will form the basis for compliance monitoring.(4) Within ninety days, submit to the director an application for a permit modification to establish a compliance monitoring program meeting the requirements of section 11-264-99. The application must include the following information: (i) An identification of the concentration of any Appendix IX constituent detected in the ground water at each monitoring well at the compliance point;(ii) Any proposed changes to the ground-water monitoring system at the facility necessary to meet the requirements of section 11-264-99;(iii) Any proposed additions or changes to the monitoring frequency, sampling and analysis procedures or methods, or statistical methods used at the facility necessary to meet the requirements of section 11-264-99;(iv) For each hazardous constituent detected at the compliance point, a proposed concentration limit under paragraphs 11-264-94(a)(1) or (a)(2), or a notice of intent to seek an alternate concentration limit under subsection 11-264-94(b); and(5) Within one-hundred and eighty days, submit to the director: (i) All data necessary to justify an alternate concentration limit sought under subsection 11-264-94(b); and(ii) An engineering feasibility plan for a corrective action program necessary to meet the requirement of section 11-264-100, unless: (A) All hazardous constituents identified under paragraph (g)(2) are listed in Table 1 of section 11-264-94 and their concentrations do not exceed the respective values given in that Table; or(B) The owner or operator has sought an alternate concentration limit under subsection 11-264-94(b) for every hazardous constituent identified under paragraph (g)(2).(6) If the owner or operator determines, pursuant to subsection (f), that there is a statistically significant difference for chemical parameters or hazardous constituents specified pursuant to subsection (a) at any monitoring well at the compliance point, he or she may demonstrate that a source other than a regulated unit caused the contamination or that the detection is an artifact caused by an error in sampling, analysis, or statistical evaluation or natural variation in the ground water. The owner or operator may make a demonstration under this subsection in addition to, or in lieu of, submitting a permit modification application under paragraph (g)(4); however, the owner or operator is not relieved of the requirement to submit a permit modification application within the time specified in paragraph (g)(4) unless the demonstration made under this subsection successfully shows that a source other than a regulated unit caused the increase, or that the increase resulted from error in sampling, analysis, or evaluation. In making a demonstration under this subsection, the owner or operator must: (i) Notify the director in writing within seven days of determining statistically significant evidence of contamination at the compliance point that he intends to make a demonstration under this subsection;(ii) Within ninety days, submit a report to the director which demonstrates that a source other than a regulated unit caused the contamination or that the contamination resulted from error in sampling, analysis, or evaluation;(iii) Within ninety days, submit to the director an application for a permit modification to make any appropriate changes to the detection monitoring program facility; and(iv) Continue to monitor in accordance with the detection monitoring program established under this section.(h) If the owner or operator determines that the detection monitoring program no longer satisfies the requirements of this section, he or she must, within ninety days, submit an application for a permit modification to make any appropriate changes to the program.[Eff 6/18/94; comp] (Auth: HRS §§ 342J-4, 342J-31, 342J-34, 342J-35) (Imp: 40 C.F.R. §264.98 )