Laserfiche WebLink
page 5 of 7 <br /> 275 Grautline Rd. 4 feet of <br /> approximately lactic clay; <br /> This strata is underl?in by damp, slightly p <br /> light to dark tan and brown, ra tan and tan-brown very <br /> below this interval lies a moist g Y- <br /> f low t <br /> fine-gra clayey sand• <br /> feet below <br /> depth of 10.5 sand• <br /> very fine-grained clayey <br /> 2. Groundwagrade was <br /> ant n-brown,at a of the water shallow water <br /> surface a depth of 6.5 feet 5 <br /> This zone is assumed to be the top <br /> table- The water <br /> twas ievel f first stabilized <br /> encountered- a dep <br /> hours after <br /> um hydrocarbons as oil and grease were detected in the <br /> 3• Petrole Y area of the removeddark waste grayish-green <br /> excavated SOination s in the <br /> observed <br /> This <br /> staining- were detected in one soil <br /> the <br /> hydrocarbons as gasoline ortion of <br /> 4. Petroleum hY taken from the product line p established <br /> sample (5S-12} (CAL) <br /> These analytical resulesAc�don Levelssc(ntrations of TPIi <br /> site. below Corrective <br /> (as gasoline) <br /> by the Water Quality Control Board• <br /> 5s-12} and is <br /> 5. BTEX <br /> was detected in one shallow soil sample <br /> also below the CAL for BTEX• soil samples taken from <br /> 6, Oil and Greaae was not detected in <br /> the excavation area. water sample indicate <br /> results of the pit BTEX, 1,2_pichloroethane, <br /> 7. Ana!;tical of TPH as gasoline) , <br /> concentration above AL for groundwater- <br /> and oil and grease <br /> CONCLUSIONS tical results it <br /> the geological field data and analytical <br /> been <br /> I• Based on saturated zone)andgrease. <br /> appears that the vadose zone <br /> imP <br /> acted by hydrocarbon contamination as oil due to leakage <br /> ' dzocQrbon contamination is most likely <br /> 2• This hY „moved waste oil tanK. <br /> from the r. outward from the <br /> 3, <br /> The extent of the ground <br /> waterresentmtime <br /> ion <br /> tank area is unknown at tand a detailed groundwater <br /> ling of the groundwaterdesign of <br /> 4. Further same needed to define the limits <br /> indtherection of <br /> gradient map is plume. This will els uired. ' <br /> the contaminant g if it is req <br /> future groundwater remediation► <br /> ear to be any hyddzaLeabor beiowmthetQroduction in the <br /> 5. There does appear <br /> (pump island) <br /> product disp <br />