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im ii <br />NORTH CAL <br />CONSTRUCTION protecting the Environment <br />A 0. Box 588 Stockton, CA 95201 2091465-5886 Genera/ Engineering Class A Lip No. <br />a <br />Sample Custody Procedures <br />flow <br />We planto observe EPA chain -of -custody jocedures nd will <br />cle n brass sample tubes with soap and water before use. <br />* <br />trans p rt the tubes in sealed chests to <br />prevent <br />Inadvert nt contamination or tampering before use. <br />* use labora ory supplied glass containers for water <br />samples. <br />* identify the s ples with gummed labels containing <br />sample number, na a of collector, date and time of <br />collection, and pla a of collection. <br />* seal the samples with <br />gummed seals containing sample <br />number, collector's nam , and date and time of sampling, <br />* maintain a field log book which records sample <br />identification, location of ampling point, volume <br />of sample, description of samp Ing point and sampling_ <br />methodology, sample distribution, and field <br />measurements, date and time of coil tion, and <br />signatures of data collector, and <br />pr-epare and use a chain -of -custody recor which will <br />contain sample number, signature of collect date and <br />time of collection, place and address of colle tion; <br />signature of persons involved In the chain of <br />Possession, and inclusive dates of possession. <br />P.O. Box 7237 Capistrano Beach, CA 92624-7237 714/493.3994 <br />P.O. Box 214609 Sx 2•....nr,, ;,, ,,..,701 . re r• •; <br />I <br />114 <br />