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APR-05-04 MON 1231 PM ELL NELSON SCHRIMP FAX NO. 21026-9320 P. 15 12%051'000 1io12 FAX 209 1 1A 010 ••^---... �'q KLONFEIPER d. Threo to five well voltrn.es of water are purged from each weL usins it submersible pump,bladder pucap,or Teflon bailer. 5. Physical parameters (pK electrical conductivity; and temperarura) are monitored for stability while purging. The physical parameter measurements are recorded on pwge- a d-sample loos, what the tia.e 8nd volume Ol Y/atL7 paLged at G1GIi measurement. 6. Samples are colleaL with a disposable bailer or bladder pump into appropriately prepared bottles provided by the analytical laboratory, 7. Samples for metals analysis are usually filtered in the field at the time of collection. $, Samples are inurediately labeled and placed in an iced sample container. At the end of the day,the samples are delzvered to the Walydral laboratory under ohain-of-cUaody control. ' &-5 VADgSF.7,ONiC MO1VaTOItL�TG 1. Prior to conducting lysirneter sampling, the pressure-varuunn cquipinent is climLed and cleans., A Soil-NAoisturc hand pump with a prtssurt-vacuum gave is used to measure residual and, implied pressur -vacuum. Nitrogen. gas is used to purge the lysinteter system for sampling. An air Pump is available as a bark up. ?. Approxiu.ately one week to one month prior to conducring the sampling, the residual pressures at the air-Unt: of each lysimerer are measured 'ad the vacuums reset to rnauufacturr<�rccon.mcnded value(usually 50 eendbars). The measurements and applied vacuums are noted on a sampling log form. Kleinfelder has found that resetting the lysimetors vacuums before the sampling yields good sample recovery. 3. The residual pressures and rn,easured just prior to collecting the sample. The waxer line is then opened and rdrroseri gas applied to the air line until either fluid or air is discharged (far dry lysimeters). The scruple is contained in a 1 liter unpreserved boale and the volume recovered is estimated. The fluid is then poured into apprupriate preserved or onipreserved bottles of the requested analysis. After the alniole .s ct•ilecred, the lysit_eler eteu�—qu :s reset to the maiiultctuer's rc ummended value, The lysintetee is also tested to evaluate powntlal leaks that may eaueo vacuum pressure los. 7100;PRC�t'.>-,7"V/57U3Pi'..i Uecembvr S.20W c5±On7 F:.ci:,re!ce:,Jn^.. Pa>;'a v;r nfir a