Laserfiche WebLink
Advanced <br /> Ge®Envir®nmental, Inc . _ -- <br /> 15 January 2001 <br /> AGE-NC Project No 95-0103 <br /> JAN 16 2001 <br /> Mr Harlin Knoll ENVIRONME'I HEALTH <br /> SAN JOAQUIN COUNTY PERMIT/SERVICES <br /> Public Health Services - Environmental Health Division (PHS-EHD) <br /> 304 E Webber Avenue, 3rd Floor <br /> Stockton, CA 95201 ENVIRONMENTAL HEALTH DIVISION <br /> 304 E Weber Ave Third Floor <br /> Subject Work Plan Addendum P O Box 388, Stockton CA 95201-0388 <br /> CHAPIIN BROTHERS, INC Approved <br /> 1766 Monte Diablo Avenue, Stockton, California Denied <br /> Conditionsor�w <br /> Sr/>� cal•• <br /> Dear Mr Knoll ate PA� e <br /> At your verbal request of 08 January 2001 Advanced GeoEnvironmental Inc (AGE) has prepared <br /> this addendum to the 15 December 2000 work plan for ground water extraction feasibility testing <br /> at 1766 Monte Diablo Avenue, Stockton, California The scope of work includes installation of three <br /> ground water elevation monitoring points, also called piezometers and the performance of two- <br /> phases of ground water extraction pilot tests <br /> The Public Health Services - Environmental Health Division (PHS-EHD) has added the following <br /> conditions to the work plan prior to approval <br /> • The installation of the piezometer will be conducted within a two-inch soil boring, <br /> established by first coring the soil boring, with a 2-inch GeoProbe Macro soil sampler <br /> • Three soil probe borings will be established and sampled within the buildings on the site to <br /> assess the remaining mass of petroleum hydrocarbons south of the remediation network An <br /> attached map of the site depicts the proposed soil probe boring locations The sampling and <br /> analysis will follow the approved procedures outlined in Work Plan For Off-Site Assessment <br /> dated 10 May 1999, prepared by AGE and approved by your office on 12 May 1999 <br /> • The performance of a"step-drawdown" or multiple-step ground water extraction test The <br /> multi-step tests will consist of ground water extraction rates 0 5 gallons pre minute (gpm) <br /> 1 0 gpm 2 0 gpm and 4 gpm, the pumping rate during each step will be at least two-hours <br /> in duration and held constant It the ground water level drops below the pump level or the <br /> lowest screen level of the well, then the test will be terminated and the acceptable ground <br /> water extraction rate will be the previous flow rate Two constant rate tests previously <br /> proposed, will be conducted for a full eight hours, at the optimum and sustainable pumping <br /> . rate <br /> 4005 North Wilson Way, Stockton, California 95205 <br /> Telephone(209)467-1006 FAX(209)467-1118 <br />