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DRAFT [TENTATIVE] WASTE DISCHARGE REQUIREMENTS ORDER R5-2023-OOXX 86 <br /> FORWARD, INC. <br /> FORWARD LANDFILL <br /> SAN JOAQUIN COUNTY <br /> STANDARD PROVISIONS & REPORTING REQUIREMENTS <br /> samples such as non-naturally occurring constituents like volatile <br /> organic compounds; and <br /> b. Standard Monitoring Specification 1.47 provides the procedure for <br /> analytes that are detected in 10% or greater of the background <br /> samples such as naturally occurring constituents like chloride. <br /> 46. Verification Procedure for Analytes Detected in Less than 10% of <br /> Background Samples. The Discharger shall use the following non- <br /> statistical method for all analytes that are detected in less than 10% of the <br /> background samples. The non-statistical method shall be implemented as <br /> follows: <br /> a. Initial Determination of Measurably Significant Evidence of a <br /> Release. Identify each analyte in the current detection monitoring <br /> point sample that exceeds either its respective MDL or PQL, and <br /> for which a release has not been previously confirmed. The <br /> Discharger shall conclude that the exceedance provides a <br /> preliminary indication of a release or a change in the nature or <br /> extent of the release, at that monitoring point, if either: <br /> i. The data contains two or more analytes that equal or exceed <br /> their respective MDLs; or <br /> ii. The data contains one or more analyte that equals or <br /> exceeds its PQL. <br /> b. Discrete Retest [Title 27, § 20415(e)(8)(E) and § 204200)(1-3)]: <br /> i. In the event that the Discharger or Central Valley Water <br /> Board staff concludes (pursuant to paragraph 1.46.a., above) <br /> that there is a preliminary indication of a release, then the <br /> Discharger shall immediately notify Central Valley Water <br /> Board staff by phone or e-mail and, within 30 days of such <br /> indication, shall collect two new (retest) samples from the <br /> monitoring point where the release is preliminarily indicated <br /> and analyze them for the constituents that caused the need <br /> for the retest. <br /> ii. Confirmation of a Release. As soon as the retest data are <br /> available, the Discharger shall conclude that measurably <br /> significant evidence of a release is confirmed if (not including <br /> the original sample) two or more analytes equal or exceed <br />