Laserfiche WebLink
- <br /> mom <br /> s <br /> 3 In February 1988, EA began sampling water from all of the moni- <br /> toring wells on a quarterly basis (Table 1 ). E11 employed its <br /> standard procedure for sampling monitoring wells at the site, <br /> based on LUPT manual and RCRA guidelines. Eafore sampling, 3-5 <br /> casing volumes of water were purged from each well, using PVC <br /> bailers. The equipment used in purging the wells was thoroughly <br /> t- <br /> cleaned with trisodium phosphate detergent and rinsed with tap <br /> water and deionized water before use in each well, to prevent <br /> cross-contamination. The chemical parameters of the water <br /> removed from the .wells were monitored by periodically t«easuring <br /> the temperature, pH, .and conductivity. When the chemical para- <br /> meters <br /> arameters stabilized (there was no measurable change in two consec- <br /> utive bailer volumes) thesampled. i <br /> i groundwater was. <br /> i Samples of groundwater were collected with clean Teflon bailers. <br /> i The bailers used to sample the <br /> p groundwater were.--scrubbed in tri- _ <br /> sodium phosphate detergent and rinser, in tap water and then <br /> eionized water: samples 2rom .the Teflon bailers were; poured <br /> T into 40 .m1 .VOA .vials with Teflon-lined caps and:sealed. in such a <br /> way that no bubbles. were ;forwed. The samples were preserved with <br /> z hydrochloric acid.. Al2 sample .viad's .were labeled.: and placed in <br /> I <br /> an ice-filled cooler. for storage and transport.-. 'A: sample of. the i <br /> de-ionized 'water.which had been used. to rinse the sampling <br /> bailers was :.: <br /> also' and submitted for �.nalysis. y <br /> 3 ; The samples were shipped under chain of custody to DHS-certified t , <br /> '1:laboratories, where they were analyzed for total petroleum hydro- . <br /> carbons as gasoline by modified EPA Method 8015 and for benzene; <br /> toluene, xylenes, and ethylbenzene by EPA Method _6-02, The purge <br /> - _ ' <br /> s water and all liquids derived from cleaning sampling equipment <br /> werz` placed. in 55--gallon drums and stored on-.:the site until <br /> t receipt of the analytical results allowed for proper disposal. <br /> The results of groundwater sampling to date are summarized in <br /> Table i Throughout the period sampled MW3 has shown the <br /> Table <br /> l highest hydrocarbon -levels of the five wells. The decreasing <br /> 1r �. <br /> h '4f ;` <br /> :e35/71050/2-90/tx 23 <br /> r <br /> r <br />