Laserfiche WebLink
' Civic Center Square <br /> 2444 Man Street Suite 21 5 <br /> Fresno California 9372q-2734 <br /> (559) 264-2535 - FAX [559] 264-743'1 GE®M9ATRIX <br /> May 17, 2002 <br /> Project 006437 <br /> tMr Michael M Luksic, R G <br /> Environmental Specialist <br /> 1 Port of Stockton <br /> Post Office Box 2089 <br /> Stockton, California 95201-2089 <br /> 1 Subject Results of Assessment and Recommendations for Monitoring Well Placement <br /> UST Site No 3 (Site Code 1282-124) <br /> Dear Mr Luksxc <br /> Geomatnx Consultants, Inc , (Geomatnx) conducted an additional field assessment on behalf <br />' of the Port of Stockton at UST Site No 3 (Figure 1) The work was conducted using boring <br /> permits issued for fieldwork conducted at the site in December 2001 This letter report <br /> includes analytical results for soil and groundwater samples collected during the additional <br /> field assessment, displays of the distribution of impacted groundwater, and recommendations <br /> for placement of groundwater monitoring wells A detailed report describing field procedures <br /> and results will be presented with the monitoring well installation report <br /> The additional assessment followed recommendations in a February 5, 2002 letter from <br /> Geomatnx to the Port of Stockton On February 12, 2002 the San Joaquin County Public <br /> Health Services-Environmental Health Department approved the additional work, with the <br /> following conditions (1) soil samples must be collected for litholog>c description from <br /> 10 feet below ground surface (bgs) to the total depth of the borings, (2) discrete water samples <br /> must be collected from 20 feet bgs and at the (total) depth of the borings, and (3) the Cal- <br /> forma Regional Water Quality Control Board—Central Valley Region is requiring analysis <br />' for 1,2-dichloroethane (1,2-DCA) <br /> Six direct push soil bonngs were advanced, and soil and groundwater samples were collected <br />' (Figure 1) Borings B3-8, 133-9, and B3-13 are located east of the former USTs, boring B3-10 <br /> is located southeast of the former USTs, and borings 133-11 and 133-12 are located southwest <br /> of the former USTs Borings B3-8 and B3-10 were advanced to 21 feet bgs, 133-12 was <br />' advanced to 26 feet bgs, and borings B3-9, 133-11, and 133-13 were advanced to 41 feet bgs <br /> Soil samples were collected at 5-foot intervals for hithologic logging, field screening for <br />' organic vapors, and possible chemical analysis None of the soil samples had observable <br /> impact from petroleum hydrocarbons Discrete-depth groundwater samples were also <br /> collected at about 20 feet bgs in all the borings and at about 40 feet bgs in the deep bonngs <br /> Sheen and separate phase petroleum hydrocarbons (PHCs) were not observed in the water <br /> samples All groundwater samples and the soil samples collected from the bottom of each <br />' (Gearnatrin Consultants, laic. <br /> Engineers Geologists and Environmental SrFentists <br />' T 1PROJEM6000s16437 00016437-Site3 Ph2 LaWert Results doc <br />