Laserfiche WebLink
i <br /> 1 h 1 <br /> Quarterly Report - Third Quarter 2003 <br /> SIERRA LUMBER ` <br /> 375 West Hazelton Avenue, Stockton, California <br /> I1.0 INTRODUCTION , <br /> At the request of Mr Bob Long of Sierra Lumber, Advanced GeoEnvironmental, Inc (AGE) has <br /> prepared this report of environmental activities conducted at 375 West Hazelton Avenue (the site), <br /> Stockton, California The objectives of the activities were to monitor dissolved petroleum <br /> I hydrocarbon concentrations in ground water, to characterize ground water flow direction and <br /> gradient,and to monitor the progress and effectiveness of soil vapor extraction(SVE)and in-situ air <br /> sparging(IAS)remediation at the site The site setting is illustrated on Figure 1 Site structures and <br /> monitoring well locations are depicted on Figure 2 <br /> This report has been prepared in accordance with guidelines issued by the California Regional Water <br /> Quality Control Board-Central Valley Region(RWQCB) for investigation of underground storage <br /> tank(UST)sites A summary of previous investigations at the site was included in Corrective Action <br /> Plan, dated 15 February 2000 Analytical data for ground water acquired to date is included in this <br /> report <br /> 2.0. GROUND WATER MONITORING AND SAMPLING PROCEDURES <br /> On 18 September 2003, ground water monitoring and,sampling were performed at the site on <br /> selected ground water monitoring wells Ground water monitoring and sampling procedures for the <br /> site were outlined in Remedial Investigation/Feasibility Study Work Plan, dated 02 March 1999, <br /> prepared by AGE and approved by,the San Joaquin County Environmental Health Department <br /> (SJCEHD) by letter dated 07 April 1999 As-built monitoring well construction details also are <br /> summarized in Table 1 <br /> t <br /> 21 WELL MONITORING AND EVACUATION <br /> I <br /> } TDepth, <br /> tc groundwater was measured in monitoring wells MW-1 through MW-8 from the top of the Y _ x _ - <br /> well casing to the'nearest 0 01-foot utilizing a Solinst water level meter The ground water elevation <br /> in each well was calculated by subtracting the measured depth to ground water from the surveyed <br /> casing elevation(Table 1) Ground water elevations were plotted and contoured on a scaled site map <br /> (Figure 3) , <br /> After water levels were measured, approximately 7 to 10 gallons of ground water(a mimmum of <br /> I three casing-water volumes per well)were evacuated(purged)from wells MW-1,MW-2 and MW-6 <br /> utilizing a polyethylene disposable bailer Temperature, pH and conductivity were measured for <br /> 1 <br /> IAdvanced GeoEnvlronmental,Inc <br /> j1 ` <br />