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MAR-24'-99 16 36 From WOODWARD CLYDE + T-TH P 01/34 Job-402 Level 3 testing involved analysis of the collected samples according to the following EPA Methods for the constituent or physical parameter identified 1 EPA 8o2o-BTEX 2 EPA 1801 -Turbidity I EPA 8000-pH, EC,Temperature [I:vaLunyuam RaZULVZ nzpan'nme The KAKIS Sampler is constructed of all 321 stainless steel, and is extromaly rugged and durable The KABIS Sampler(Model-1) is small (11W dia n 14"l)and easy to handle and operate There are no moving parts,and decontamination is a simple affair, requiring only a three-bucket wash cycle(detergent/cloar nnsv/DI nnse) The mean evaluation scorn of the Barcelona rating(1984)was usod as a comparison and a"weighted"average was computed for the NARIS Sampler scoring represented in Tam 3 is a tabulated mean of a total of 16 separate questwnnalres completed by 16 different users Using the criteria first shown on TA13L E 2, the KABIS Sampler was evaluated against the bailer 1,1Nl°1MMS RESULTS REPOR' rR'a General-The analyses of both pro-and post-purging for the KABIS Sampler were compared,as were the analyses for the oheokrrAlve b6ulor and the KABIS Sampler Semplrng error analysis was oonduated to accordance with appropnate EPA statistical error analysis procedures Pre-Purge vs. Post-Purge-The analysis results were compared for recovered contaminant concentration The pro-purge samples (obtained using the KABIS Sampled showed a dramatically higher recoverable concentration in all wells,(contrary to the consequence presented in the literature) The physical parameters of conducbvity(EC), hydronium ion concentration(pH),and temperature(T"C)were checked for pre-and post-purge conditions and showad that there was little difference indicated Chock valve 9aller vs the K481S Sampler-Comparison of the recovered total petroleum hydrocarbon values initially indicate that a higher concentration of dissolved contaminants was captured by the check-valve bailer Upon closer inspection of the depths of penetration and retrieval of both samplers,however, reveals this difference to be a function of vertical concentration distribution rather than capture capability There are numerous analysis and sampling errors associated with the check-valve bailer which is too dependent on technique;the KABIS Sampler requires no particular technique for its use. An evaluation of the relationship between total petroleum Hydrocarbon capture and volatile loss between the Check-valve bailer(CVS)and the KABIS Sampler(KS)was conducted.The following method was used fge��l4i®ea 9 AJ_ These two equations can be alternately shortened to 0 6 of 14 3124!99 4 21 PM