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' Former Manna Pro Site Page 4 Quarteily Groundwater Monitoting Repoit &Monitoring Well Construction Ptoject No 207 2 June 2, 2000 ' While drilling, with hollow stem auger tools, all soil cuttings were placed in D O T approved, steel 55 gallon drums for temporary storage pending profiling ' and proper disposal The drilling mud and the entrained soil cuttings were also temporarily stored in drums ' 2 1.2 In Situ Sample Collection Procedures During the hollow stein auger boring process soil samples were collected for geological and analytical evaluation at five foot intervals using a 2 0 inch ' diameter (i d ) California split spoon sampler with the sample contained in 2 by 6 inch stainless steel liners The sampler was driven up to 18 inches into the native soil using the 140 pound hammer mounted on the drill rig The blow ' count was recorded for each sample collected All soil samples were sealed with aluminum foil, capped, labeled and placed in a cooler at 4c' Celsius for transport to the laboratory following Chain of Custody protocol I During the mud rotary drilling process, a SimulProbe sampling tool was used to I ' obtain soil and groundwater samples The SzmulProbe is a direct push tool which is hammered into the base of the soil boring after the drill stem has been temporarily removed from the hole The device is capable of retrieving up to 18 of soil in a modified split spoon sampling device The sample is contained in vertical inches of soil in three 6 inch by 2 75 inch diameter stainless steel sample sleeves In addition, a screen with a retractable shield allows up to two liters of ' water to enter the sampling device While lowering the sampling tool to the bottom of the boring, a large rubber condom is used to keep drilling mud from entering the sample containment spaces In this case SimulProbe samples were ' collected from the intervals at 55 feet, 69 feet and 96 feet No water sample was retrieved at the 55 foot level, but a soil sample was obtained Both soil and groundwater samples were obtained at the 69 and 96 foot levels 1 Boring logs of soils encountered in the boring were kept by a registered geologist ' (see Appendix C) Recorded in these logs were notes on sampling intervals, boring locations and sediments intersected by the boring Not all soil samples collected were submitted for laboratory analysis Accordingly, a field screening ' procedure was used to select those samples which were tested Special attention was paid to sediment type, color, grain size, sorting, odor and the readings above background on an organic vapor meter (OVM) The OVM is a field portable ' photo ionization detector that uses a 10 2 eV lamp to detect compounds with ionization potential below 10 2 eV (hydrocarbon range) In addition to the on- site laboratory, selected samples were submitted for normal laboratory analysis • ' 2937 Veneman Ave,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 Modesto, CA 95356 Fax (209) 569-0293