Laserfiche WebLink
Frank C. Alegre Trucking, Inc. <br /> Lodi, California <br /> January 25, 1991 <br /> 4. IDSNTIrn"a THS CONTAMINANT PLUM <br /> 4, 1. Phase I Site Assessment <br /> Regarding information on the site characterization <br /> and results of previous study, the reader should refer to <br /> Condor Earth Technologies, Inc. 's September 28, 1990 <br /> "Problem Assessment Report" . <br /> j 4,2, Phase II Investigation <br /> 4.2.1. Location of Borings <br /> Three vertical borings were au <br /> Exploration, Inc. gered by Spectrum <br /> the tank site. <br /> he <br /> used foi- montTthree <br /> itoringwell installationforthe purpose of <br /> re <br /> of <br /> takil! -ound water sampler (Figure 4.1) . The soil i' ... - <br /> bori*xs/monitorta` wells are identified as AM-1, AN-2 and i <br /> AM-3. <br /> 4.1.2. Depth of Borings <br /> She vertical depth auger <br /> for the three borings <br /> are as follows: AN-1 55 AN-2 55' and AM-3 55' . An a <br /> result of on-site evaluations indicating penst-ation of the <br /> ground water had been rem-hsd at the depth of t45' in each <br /> boring, sugaring was terminated at the depth of 10' below �. <br /> the water table. <br /> 4.2.3. Soil Sample Procedure <br /> The sugaring was performed wi?h a truck-mounted <br /> auger rig using 8" hollow stem augers. The augers acted as <br /> continuously advancing steel casings preventing teat holes z <br /> Irom caving above the levels to be sampled. Soil samples <br /> d e <br /> were obtained by lowering a split spoon sampler inside the <br /> hollow stem auger and driving it into undistur:ved soils. <br /> The sampler was equipped with brass liner tubes designed to , <br /> receive intact soil specimens. The sampler was hand cleaned iii 4 <br /> with dilute solution of TSP and tap water prior to each <br /> sampling action. Clean braes liners were placed inside the <br /> sampler. Steam cleaning of the augers was also performed <br /> prior to ontering the cite and clean lead augers were used <br /> in teat holes to prevent cross contamination. <br /> The auger crew consisted of a driller and a helper. <br /> Field exploration was supervised by the Mr. Thomas W. Ladd, ! <br /> California Registered +.eologlet 03588, who was responsible ' <br /> for preparing the recording of field conditions, soil sample <br /> handling and preservation, and control of the field <br /> equipment cleaning process. <br /> Thi cnds of the tube samples then capped with pressure <br /> fitted plastic cape, sealed with adhesive tape and labeled. <br /> Th- saoples were placed in an iced insulated chest packed <br /> for ;,reservation for transported to Oeolnalytical z <br /> ',aboratorloe for analysis. '4 <br /> 4. 2.4, Sample Description <br /> Sample llthologic descriptions and logo have been <br /> prepared for each boring and are presented as Attachment <br /> OeoPlue Consulting Services <br /> Page - 8 <br />