Laserfiche WebLink
SP <br />(1) Sample collection; <br />(2) Sample preservation and shipment; <br />(3) Analytical procedures; and <br />(4) Chain of custody control. <br />(b) The owner or operator shall determine the concentration or value <br />of the following parameters in ground -water samples in accord- <br />ance with Item 2(c) and (d): <br />(1) Parameters characterizing the suitability of the ground <br />water as a drinking water supply as specified by EPA <br />in Appendix III, Part 265, Title 40, Code of Federal <br />Regulations. <br />(2) Parameters establishing ground -water quality: <br />(i) Chloride <br />Iron <br />(iii) Manganese <br />(iv) Phenols <br />(v) Sodium <br />(vi) Sulfate <br />(3) Parameters used as indicators of ground -water contamination: <br />( i ) pH <br />(ii) Specific Conductance <br />(iii) Total Organic Carbon <br />(iv) Total Organic Halogen <br />(c) (1) For all monitoring wells, the owner or operator shall <br />establish initial hackground concentrations or values of <br />all parameters specified.in Item 2 Cb.). This shall be done <br />quarterly for one year. <br />(2) For each of the indicator parameters specified in Item 2 <br />(b)(3), at least four replicate measurements shall be <br />obtained for each sample and the initial background <br />arithmetic mean and variance shall be determined by pooling <br />the replicate measurements for the respective parameter <br />concentrations or values in samples obtained from upgradient <br />wells during the first year. <br />(d) After the first year, all monitoring wells shall be sampled and <br />the samples analyzed with the following frequencies: <br />(1) Samples collected to establish ground -water quality shall be <br />obtained and analyzed for the parameters specified in <br />Item 2(b)(2) at least annually. <br />(2) Samples collected to indicate ground -water contamination <br />shall be obtained and analyzed for the parameters specified <br />in Item 2(b)(3) at least semi-annually. <br />