Laserfiche WebLink
v <br /> w •.,err �, <br /> MEN- <br /> NO NO <br /> ME <br /> pt <br /> i <br /> The soil boring was completed as a two inch diameter monitoring <br /> j well . Specific details of the well completion/construction are <br /> included an the individual log (Appendix 1I ) . Subsequent to <br /> completion, the monitoring and domestic wellheads were surveyed <br /> {j (Table 1) <br /> After completion, the monitoring well was developed <br /> i our well volumes (casing P by hand <br /> bailing in excess of £ <br /> j,. g pies sandpack) . A <br /> groundwater sample was collected using a teflon bailer and <br /> contained, preserved and transported to a Califernia certified <br /> laboratory in accordance with EPA protocol. The samples were <br /> analyzed for benzene, toluene, ethylbenzene and xylene (BTEX) by <br /> meth'6d EPA 602. Water level measurements, summarized in Table 1, <br /> were taken after well development using a conductivity probe. <br /> Table 1 <br /> Monitoring Data <br /> Wellhead <br /> _ DDepth Water <br /> Date Elev. <br /> to Water Elev. <br /> t- - <br /> ' 5/22/88 <br /> MMI 100.00* 12.25 67.75 <br /> DOM1 101.15 22.08 89.07 <br /> *Arbitrary Datura" <br /> r The soils encountered during dzilliny consisted of clays, silty <br /> ~' <br /> clay--') and sandy silts/silty sands to 28 feet, the maximum depth <br /> explored. In general, an interval of clay lies above and beneath <br /> a section of silty sediments encountered between 9 and. 19 f:sat <br /> below grade. Saturated soils were first noted at approxima'i-,ely <br /> 19 feet below grade and static water levels stabilized at a depth <br /> b of 12 feet (Table. l) . Field inspection Of scils did not record <br /> any product odors during drilling. <br /> '' .. <br /> The Water Well Drillers Report for the nearby domestic well <br /> r� recorded significant clay intervals from 14 feet to 47 feu <br /> 4t 154 feet A t and <br /> 55 t <br /> ' W (Appendix II} . This well is perforated batween <br /> ' <br /> 165 and 185 fest and has a 100 foot deep surface sari Itar,}"'seaI. <br /> Laboratory analysis of soils did not record the presence of <br /> ~ volatile hydrocarbons (BTX or TPH) at levels above method <br /> ` detection limits. The laboratory data sheets and the '`chain of <br /> custody form are contained within Appendix iII . <br /> Laboratory analysis of a gznundwater sample from MW-1 recorded <br /> E concentrations of benzene and toluene-_ and _foto L petroleum- <br /> -- ----hydrocarbons---at---1—.50- -r <br /> 5 and 297 arts -- T - <br /> p- per billion (ppb),. <br /> respectively. Xylene was r,ot recorded above the method detection <br /> limits as reported. The laboratory data sheets and chainof <br /> s _ custody form are..presented in Appet,dix IV. <br /> to <br /> `€{ & <br /> =ffill"Mimi <br /> `i - - - 4• - <br /> e <br /> 1 <br />