Laserfiche WebLink
�k <br /> 1� <br /> C <br /> M iraq, I -4 <br /> "ME <br /> �i. <br /> lected at five foot Jr,tervals. sample collection began at a <br /> depth of five feet below grade; no sail samples collected below <br /> the groundwater table were submitted for laboratory analysis. <br /> All soil samples were collected, preserved and transported under <br /> chain-of-custody protocol in accordance <br /> at with <br /> Watande20 fao't below <br /> Soil <br /> Sampling <br /> Protocol (Appendix I) p e and <br /> grade level were analyzed for benzene, <br /> toluene, ethylbenzen , <br /> Xylenes (BTEX) and total petroleum hydrocarbons as aridasoline <br /> grease, � <br /> (TPHG) by EPA 8020 and DOHS methodology, hotoioniza'- " <br /> was based on p <br /> ti EPA method 418.1. olef ctocollection <br /> Y la e visual evidence of hydrocar- <br /> bons. <br /> ydrocar-- 5 <br /> tion detector (PID), ; <br /> bons. <br /> Soil samples collected in January 1991, were tested for B <br /> TEX <br /> TPHG. These later samples were not analyzed for oil and grease <br /> because analysis results for soils collected during the initial <br /> :1 grease. During <br /> phase of investigation did not detect(Hoil fan Joaquin County <br /> the January drilling Diane Hinson, <br /> Health Department) , requested that one s.:il sample also be <br /> collected below groundwater from i9W7 and submitted for BTEX and <br /> TPHG analysis. . <br /> The soil cuttings generated from the borings were covered with <br /> six mil plastic on-site. :soil cuttings will be properly dis- <br /> posed of after reviewing the analytical results. <br /> 3.3 Groundwater Sampling <br /> After well installation, <br /> sample.'.s were collected from the <br /> monitoring wells ef-4sr purging a min-mum of four well volumes f <br /> {casing and sand pec+tp from each well. The purged water will <br /> remain onry <br /> -site, i:� secured 55 ala f�°ntreatment fil <br /> or disposallaboratoof <br /> results are received. A proposal d. <br /> the water produced during development will then be prepare <br /> Water sample collection and preservation was in ccor I)e dancwill <br /> _. WaterWork's Groundwater Sampling Protocol (App lied <br /> water samples were analyzed by Sequoia Analytical and App <br />` Analytical Laboratories for BTEX and TPHG. One sample, taken <br /> r during the initial sampling, from the well in tank pit A, was <br /> analyzed for oil and grease (EPA 503 D & E). <br /> Bailers with bottom en.tptying devices to reduce volatilization <br /> were used for water sample collection. Groundwater was monitored <br /> oundwater <br /> ling <br /> iA pendix I)Ce Nowith <br /> replicate-terWo samplesrwere s b ittedpfor a alysis� <br /> ( l <br /> P <br /> The field investigation we-s Ronductred Geologist NOdirected under the supervi- <br /> sion of Russell W. Juncal, g <br /> and <br /> Nora H. Kataoka, CA Registered Civil Engineer No. 38322. <br /> ion, and <br /> Well head elevation suements were taken both priorwere surveyed after well ltot <br /> depth....to__.watex' mea_ sampling <br /> . ._ ._ ._..-------- <br /> and several days later. <br /> 3 <br /> MWAMMMWMMffMW E:5111 I MOM <br />