Laserfiche WebLink
groundwater investigation Field work was performed March 23 and 24, 1999 by <br /> ' Gallardo, as proposed and accepted by San Joaquin County Public Health Services, <br /> Environmental Health Division (PHSIEHD) A report summarizing findings was forwarded <br /> to Jeff Hopkins on May 24, 1999 by Rafael L Gallardo <br /> 1.12 Work After October 2000 <br /> ' Additional characterization of the pollution extent and its impact on groundwater was <br /> conducted by D K Barber P E and Associates from October 2000 through April 2001 <br /> 1 Borings were Initiated on November 13, 2000 Groundwater was not encountered until <br /> about 50 FT below ground surface (bgs) after very slow boring progress and operational <br /> problems The depth and soil material showed the direct push technology (DPT) rig to be <br /> too light duty and efforts were suspended awaiting clear weather and availability of a <br /> heavier DPT rig Boring resumed December 4, 2000 Equipment problems again resulted <br /> in suspension of site work until December 13 and 15, 2000 and January 4, 2001 activities <br /> Sod samples were collected at five FT intervals to groundwater approximately 52 FT bgs <br /> Sod samples were field classified using either a geologist or registered civil engineer Grab <br /> water samples were collected in boreholes and the constructed monitoring well <br /> Stellar Environmental Solutions, of Berkeley, CA , a Geoscience & Engineering <br /> Consulting firm, assisted with field classification, sample collection and graphical <br /> presentation A SES California registered Geologist and a second senior geologist were <br /> on the site during several different days to log the exploratory bores and establishing the <br /> site lithology The report included graphical boring logs and brief summary of findings <br /> 1.2.1 Soil Borings <br /> Environmental Exploration, of Valley Springs, CA, a Licensed C-57 drilling contractor, <br /> 1 using a Geoprobe 6600 Unit completed direct push borings with the heavy duty truck <br /> mounted machine, at five different locations (C-1, C-2, C-3, C-4, C-5) to encountered <br /> groundwater San Joaquin County EHS Permit SR# 0024615 <br /> Soil samples were collected at 5 FT intervals during the boring process A total of 56 soil <br /> samples were field classified Volatile hydrocarbons were measured from a "baggie" <br /> portion measured with a Photo Ionization Device (PID) Soil samples to be tested were <br /> contained in 1 125 IN diameter by 6 IN long brass sampling sleeves from the drill rod All <br /> sleeved samples were capped, labeled and chilled Samples were transported to and <br /> 1-2 <br />