Laserfiche WebLink
09 January 2004 <br /> AGE-NC Project No 96-0254 <br /> Page 2 of 6 <br /> Excavated soil was screened for the presence of organic vapor using a using an organic vapor meter <br /> (OVM) equipped with a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, <br /> calibrated to isobutylenc) Based on OVM readings and field observations, excavated soil was <br /> segregated into Impacted soil and clean soil Only soil exhibiting hydrocarbon odor or measurable <br /> OVM readings was stockpiled for final disposal, the clean soil was used to backfill the excavation <br /> I Based on soil data collected from the site during previous Investigations, AGE originally proposed <br /> excavating approximately 1,000 cubic yards of Impacted soil as part of remedial action at the site <br /> However,based on field observations (OVM readings, stained soil, hydrocarbon odors),the extent <br /> of Impacted soil at the site appeared to be significantly larger than anticipated Subsequently, with <br /> EHD approval, AGE excavated an additional 400 cubic yards of Impacted soil In total, <br /> approximately 1,400 cubic yards of petroleum hydrocarbon-Impacted soil and 100 cubic yards of <br /> Iclean soil were excavated from the site Figure 3 Illustrates the approximate location and lateral <br /> extent of the excavation <br /> 23 EXCAVATION SOIL SAMPLE COLLECTION AND ANALYSIS <br /> Soil samples were collected from the floor and sidewalls of the excavation by AGE personnel <br /> Excavation samples were collected from the backhoe bucket using a metric soil sampling hammer <br />' loaded with brass sleeves Soil sample locations are Illustrated on Figure 3 <br /> Upon collection,the exposed ends of the sample sleeve were covered with Teflon sheets,capped and <br /> I sealed with tape Each sample sleeve was properly labeled, placed in a chilled container under ice <br /> and subsequently transported under chain-of-custody procedure to Cal Tech Environmental <br /> Laboratory(CTEL),a State of California Department of Health Services(DHS)-certified laboratory <br /> Soil samples EX1 through EX7 were analyzed for the following constituents <br /> • Total petroleum hydrocarbons as gasoline (TPH-g) and as diesel (TPH-d) by EPA Method <br /> 8015 Modified, <br /> • Benzene,toluene,ethylbenzene and xylens(BTEX)and methyl tertiary-butyl ether(MTBE) <br /> by EPA Method 8021 B, and <br />' & Total lead by EPA Method 6010B <br />' Soil samples EXE8 through EXE23 and FLR-01 through FLR-08 were analyzed for <br /> • TPH-g and TPH-d by EPA Method 8015Modified, <br />' • BTEX by EPA Method 8260B, and <br /> • <br /> Advanced GeoEnvironmental,Inc <br />