Laserfiche WebLink
CLEARWATER <br /> . G R O U - I N C <br /> I <br /> CLEARWATER FIELD PROCEDURES <br /> Well Installation, Soil Sampling, Well Development and <br /> Groundwater Sampling <br /> Drilling and Soil Sampling <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-sate, 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 as <br /> the subject of the investigation, stainless steel loners will be used instead of <br /> brass Additional soil samples may be collected based upon significant <br /> changes an 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 lithologic descriptions <br /> (according to the unified soil classification system) and for organic vapor field <br /> analysis Organic vapors will be analyzed an the field by placing an a plastic <br /> bag or glass jar approximately 30 grams of soil from an undisturbed soil <br /> sample. The bag or jar will be sealed and warmed for approximately 20 <br /> minutes, then pierced The head space an the bag will be tested for total <br /> CLEARWATER GROUP,INC 1 December 16, 1994 <br />