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,E .,.�rj'a�., % j • 1 v - . - u r .- ...: I ,.... ' _ .:~ a� r n -' ..c -... - v rrl - -4 � T t^'F I <br /> `r t <br /> 17 April 1997 it <br /> I <br /> • AGE-NC-96-0235 s 4 µ <br /> I i <br /> -Page 3 of 4 <br /> > 1 <br /> 4.0. ' PROCEDURES r <br /> l <br /> i <br /> 41 DRILLING,,AND SAMPLING <br /> 1 , <br /> The following procedures will be performed for the installation of ground water monitoring wells ' <br /> 1 Notify the PHS-EHD at least 48 hours prior to commencement of any work, while securing- ; <br /> proper county permits <br /> 2 Mark boring locations at least 4$ hours in advance for an Underground Service Alert(USA) <br /> check of underground utilities or pipes - <br /> 3 `Advance three soil borings utilizing a truck-mounted drill rig, and $ 25-inch diameter hollow a <br /> stem augers The`borings will be advanced to a total depth of approximately 35 feet <br /> Proposed boring locations are depicted on Figure 2 <br /> 4 Decontaminate all sampling equipment to an Alconox solution and tinge with water prior to <br /> each sampling run Steam-clean auger flights before advancement of each boring <br /> 5 Collect soil samples at 5466t intervals In each boring beginning at a depth of 5-feet bsg <br /> • Samples will be collected using a California split-spoon sampler loaded with three 2-inch by _ <br /> 6-inch brass sleeves The sampler will be driven by dropping`a 140-pound weight from a <br /> height of 30 inches The number of blow required to advance the sampler In 6-Inch ` <br /> i <br /> increments will be recorded on the boring log <br /> 6. - Preserve soil in the`iead sleeve by covering both„ends with Teflon sheets,'capping, and <br /> sealing with tape I <br /> ~7 Label and log samples on a chain-of-custody form ' <br /> Y , � <br /> '8 Store samples In a chilled container`and transport to a State certified laboratory for,analysis ; <br /> Selected`soil samples will be analyzed for total petroleum hydrocarbons'quantified as <br /> gasoline and diesel (TPH-g, TPH`d) and volatile aromatics (benzene, toluene, ethylbenzene ti a <br /> F ; and xylenes, BTE&X)with methyl tertiary-butyl ether(MTBE) in accordance,with the EPA <br /> -- -methods $015m and $020 --T” <br /> 9 Monitor auger returns and soil sample duplicates for the presence sof volatile organics using <br /> a photo-Ionization detector,(PID),pre-calibrated to Isobutylene <br /> 14 Log_auger returns and sa1i sample d4licates In accordance with the Unified Soil <br /> Classification System " -" <br /> I <br /> 11 Place auger returns and rtnseate-in-55-gallon DOT drums and store on-site Disposal <br /> i 1 { a - <br /> altei-nattvesr will be evaluated based onxesults of laboratory analyses <br /> � <br />