Laserfiche WebLink
:. <br /> MMI <br /> Work Plan September 5, 1990 <br /> ARCO Station 548, Stockton, California AGS 30004-1 <br /> between the new tanks to continue further investigation of soil conditions beneath the tanks. <br /> ® Vapor-recovery wells could be installed in these borings if remediation of soil is warranted. <br /> Collecting Soil Samples <br /> _J 0 <br /> During drilling,soil samples will be collected at 5-foot or other appropriate intervals using <br /> a California-modified, spEt-spoon sampler equipped with clean brass sleeves. Samples will <br /> be collected by drilling L�e boring to a point just above the sampling depth and then driving ' <br /> the sampler into the soil through the hollow center of the auger. The sampler will be driven <br /> ® 18 inches with a standard 140-pound hammer dropped 30 inches. The number of blows. <br /> required to drive the sampler each successive 6-inch interval will be counted and recorded <br /> on the field boring fog to give an indication of soil consistency. Soil samples will be <br /> {® collected,identified, and evaluated for relative levels of gasoline hydrocarbons using a PID <br /> when appropriate. Exampfes of the Field Boring Log, the Unified Soil Classification <br /> ® System, and Log of Boring are included in the appendix to this work plan. <br /> Soil samples collected for possible chemical analysis will be promptly sealed with aluminum <br /> ® foil, plastic caps, and tape. ' They will then be labeled and p!-aced in iced storage for <br /> transport to analytical laboratory.-A Chain of Custody Record will be initiated by-the-- <br /> - <br /> field geologist and will accompany the soil samples to the laboratory. An example of the <br /> 9 <br /> APpl eol GOosystems <br /> 5. <br />