Laserfiche WebLink
CLEARWATER FIELD PROCEDURES <br /> Well Installation, Soil Sampling, Well Development and <br /> Groundwater Sampling <br /> Drilling and Soil Sampling <br /> { <br /> Prior to drilling, Clearwater Group, Inc (CGI) will obtain all necessary permits <br /> and also locate all underground and above ground utilities through <br /> Underground Service Alert (USA) and thorough site inspection All drilling <br /> equipment will be inspected daily and will be maintained in safe operating <br /> ' condition <br /> All borings will be drilled using a truck-mounted hollow-stem auger drill rig, <br /> ' unless site conditions warrant a different drilling method All down-hole <br /> drilling equipment will be steam cleaned prior to arriving on-site, to prevent <br /> the introduction of contaminants from off-site Working components of the <br /> drill rig near the borehole, as well as augers and drill rods will be thoroughly <br /> steam cleaned between each boring location All drilling and sampling <br /> methods will be consistent with ASTM Method D-1452-80 and local, state and <br /> ' federal regulations <br /> Soil samples are typically collected every 5 feet using brass tubes fitted in a <br /> California-modified split spoon sampler If copper or zinc contamination is <br /> the subject of the investigation, stainless steel liners will be used instead of <br /> t brass Additional soil samples may be collected based upon significant <br /> ' changes in lithology or in areas of obvious soil contamination For sample ' <br /> collection; the split spoon sampler is driven 18 to 24 inches past'the lead auger <br /> by a 140-pound hammer falling a minimum of 30 inches The number of <br /> blows necessary, to drive the sampler and the amount of soil recovered will be <br /> recorded on the field exploratory soil boring log The soil sampler and liners <br /> will be cleaned with an Alconox solution and rinsed with tap water prior to <br /> each sampling event <br /> Soil removed from the top two liners will be used for litholognc descriptions <br /> (according to`the,unified soil I classification system) and'for'organic vapor,field <br /> "analysis. Or anrc vapors will be analyzed nil the ;field b lacus in a <br /> plastic <br /> I I I I g p I yl 1 Y P g P , <br /> I Ibag kor glass jar approximately 30 grams of I snnl'ifrom an� undisturbed soil <br /> I , , sample ,The bag 'or jar wall be sealed• andl,warmed for .approximately 20 I II I' <br /> minutes, then pierced' The head `space' inn tthe' bag Iwill be tested for total ' <br /> q'IJ I'V,, <br /> € I � <br /> If <br /> 4 <br /> CLEARWATER'GROUP,INC ! November 9, 1994 I I f,i' <br /> III f I I. C I <br /> i <br /> I "I <br />