CORRESPONDENCE_1993 - 1996 - Laserfiche WebLink

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STANDARD PROVISIONS AND REPORTING REQUIREMENTS September 1993 FOR WASTE DISCHARGE REQUIREMENTS FOR DISCHARGES REGULATED BY CHAPTER 15 AND/OR PART 258 -13- 2. If the Discharger determines that there is significant physical evidence of a release, the Discharger shall notify the Board of this fact by telephone within 24 hours and by certified mail within 7 days, and shall carry out the requirements of 3. below for all potentially -affected monitored media. 3. If the Discharger concludes that a release has been discovered: a. If this conclusion is not based upon "direct monitoring" of the Constituents of Concern, then the Discharger shall, within thirty days, sample for all Constituents of Concern at all Monitoring Points in the affected medium for the waste management unit and submit them for laboratory analysis. Within seven days of receiving the laboratory analytical results, the Discharger shall notify the Regional Board, by certified mail, of the concentration of all Constituents of Concern at each Monitoring Point in the affected medium. Because this scan is not to be statistically tested against background. only a single datum is required for each Constituent of Concern at each Monitoring Point [2550.8(k)(1)]. b. The Discharger shall, within 90 days of discovering the release, submit a Revised Report of Waste Discharge proposing an Evaluation Monitoring Program meeting the requirements of 2550.8(k)(5) and 2550.9 of Article 5, and, if Part 258 is applicable to the site, satisfying the requirements of 40 CFR 258.55 . C. The Discharger shall, within 180 days of discovering the release, submit to the Board a preliminary engineering feasibility study meeting the requirements of 2550.8(k)(6) of Article 5. Discrete Retest In the event that the Discharger concludes that a release has been tentatively indicated (under the statistical or nonstatistical methods above), the Discharger shall, within 30 days of this indication, collect two new suites of samples for the indicated Constituent(s) of Concern or Monitoring Parameter(s) at each indicating Monitoring Point, collecting at least as many samples per suite as were used for the initial test. Resampling of the Background Monitoring Points is optional. Samples shall be analyzed using the same analytical methods which produced the original data which showed tentative evidence of a release. Sample data shall be analyzed using the same statistical procedure or non -statistical procedure which provided the tentative evidence of a release. As soon as the data are available, the Discharger shall rerun the statistical method (or non -statistical comparison) separately upon each suite of retest data. For any indicated Monitoring Parameter or Constituent of Concern at an affected Monitoring Point, if the test results of either (or both) of the retest data suites confirm the original indication, the Discharger shall conclude that a release has been discovered.