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r ' <br /> will not be diluted below detection <br /> s that <br /> pollutant in a s mp <br /> limits by mixing th uncontaminated samples or samAle <br /> contain low cone n rations of the pollutant. <br /> \\ Soil samples shall be acquiredt <br /> prepared, preserved, stored, <br /> (i) ) methods that are appropriate <br /> transported , and analyzed by <br /> for the objectives of the investigation and that will acceptable methods may be <br /> safeguard sample integrity- Some PAendix 1, Table C of <br /> found In the references listed in <br /> be <br /> this subchapter. Other similar or superior methods may <br /> approved by the local agency. <br /> (�} Samples shall be analyzed by field or laboratory methods <br /> that provide quantitative or qualitative results. if <br /> qualitative methods are used, their lower detection limits <br /> shall be verified by the developer, distributor or actual <br /> manufacturer <br /> of the testing method or device? - The an <br /> �ia1,l .� r`..+ , ..'.,.k �•., �:•.-' �}. field tests in the case of sensory' yp <br /> shall be by methods that are appropriate for the objectives <br /> of the investigatton and that will safeguarin the <br /> d sample <br /> integrity- Some acceptable methods <br /> yCOf ound <br /> bethis subchapter- <br /> references listed in Appendix 1, be ap <br /> rproved by the <br /> Other similar or superior methods maysoil <br /> local agency. The analytical method approved for <br /> shall have a detection limit that y lower than the <br /> testing ha <br /> with anof the long-term <br /> concentration that would interfere <br /> monitoring methods that could be used at the site• <br /> Samples shall be analyzed <br /> for one or more of the most <br /> ( that have been stored the <br /> persistent constituents then an shall <br /> (7/ underground storage tank- If the use of the undergroundIC <br /> storage tank has historically changed, <br /> be for at least one constituent from each period of use- <br /> . a the hazardous substance Ls known to degrade or transform to <br /> other constituents in the soil environment, the analysts <br /> e degradation and/or transformation <br /> shall include thes <br /> constituents- If levels of <br /> be analyzed 1 any order of depth. <br /> # 7, { rt#",r: Samples may or susAected to have been <br /> - hazardous su stances k <br /> wn <br /> contained in the undg ground storage tank are detected at <br /> I a•fcess of background concentrations <br /> trations shall be applicable only if the <br /> concentration <br /> (background CO c naturally at the site} , further soils <br /> constituent oc ra pursuant to this subsection and <br /> analysis is ¢btX <br /> ssary P nave <br /> the hazardgds snce(s} shall be assumedto In this <br /> atedFromunderground storage tank. be <br /> origin the Soil samples need not <br /> situatigh, the rematpder of p permit shall net <br /> analyzed pursuant tol•these regulations- clearly <br /> be granted unless further detailed investigation <br /> 4.20 <br /> „e ` <br />