ARCHIVED REPORTS XR0005813 - Laserfiche WebLink

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custody fonn They are placed in ziplock bags and stored in a chest cooled to 4 °C %�Jtli ice The preserved samples are COC (chain of custody) delivered to the chosen laboratory ANALYTICAL RESULTS TPH is the abbreviations used for Total Petroleum Hydrocarbons used by the laboratories for water and soil anal}ses The letter following TPH indicates a particular distinction or grouping for the results The letters "g", "d", "k", or "o" indicate gasoline, diesel kerosene, or oil, respectively, i e TPH-d for diesel ranges TPH BTEX or MTBE are acronyms or abbreN cations used for Benzene, Toluene, Eth)lbenzene and all of the Xylenes (BTEX) and Meth)I tertiary-But)I Ether (N4TBE), respecti%ely MBTEX is the designation for the combination of the abo,,e fiN e compounds TBA, DIPS, ETBE, and Tk.NIE are the acron)cns used for the o\ygenates t-butanol, di- isoprop)I ether, ethyl-t-butyl ether and t-amN Imethyl ether, respectiN ely Laboratory lower detection limits unless othery-ise noted due to matrix interference or elevated concentrations of target compounds are as follo\N s TPH- 50 ug/L MTBE 0 5 ug/L Benzene 0 5 ug/L Toluene 0 5 ug/L Ethyl Benzene 0 5 ug/L Total Xylenes 2 0 ug/L The less than symbol, <, used «ith a "parts per value" indicates the lower detection limit for a given analytical result and the level, if present, of that particular analyte is below or less than that lower detection limit Other abbreviations con-iinonly used are ppm, ppb, mg/Kg ug/KQ, mUl and uUl are parts per million, parts per billion, milligrams per kilogram, micrograms per kilogram milliliters per liter, microliters per liter~respecti\ely CHAIN OF CUSTODY DOCUMENTATION All water samples that are collected by N'TGE and transported to a certified analytical laboratory are accompanied by chain-of- custody (COC) documentation This documentation is used to record the mo%ement and custody of a sample+froirs-collection in the field to final anal)sis and storage Samples to be anal)zed at ,the certified laboratory were logged on the COC sheet provided by the laboratory The same information provided on the sample labels (site name, sample location, date, time, and analysis to be performed) is also noted on the COC form Each person relinquishing custody of the sample set signs the COC form indicating the date and time of the transfer to the recipient A copy of the COC follows the samples or their extracts throughout the laboratory to aid the analyst in identifying-the samples and to assure analysis within holding times Copies of the COC documentation are included with the laboratory results in Appendix C of the sampling report