Laserfiche WebLink
' Work Plan Addendum <br /> COMFORT AIR <br /> I1607 Turnpike Road, Stockton, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Greg Gaut of Comfort Air,Inc ,Advanced GeoEnvironmental, Inc (AGE)has <br /> prepared this Work Plan Addendum for 1607 Turnpike Road, Stockton, California The purpose of <br /> the investigation is to evaluate the vertical and lateral extent of petroleum hydrocarbon impacted soil <br /> and ground water as a result of the former operation of an underground storage tank(UST)at the site <br /> and to evaluate general aquifer characteristics such as hydraulic conductivity, storativity, <br /> transmissivity, and draw-down at a constant pumping rate <br /> This work plan describes the scope of work and procedures to be implemented for abandonment of <br /> monitoring wells MW-1, MW-2 and MW-4, advancement of one cone penetrometer testing (CPT) <br /> soil boring, drilling and installation of four "cluster" ground water monitoring wells and one deep <br /> ground water monitoring well, collection and analysis of soil and groundwater samples, drilling and <br /> installation of one ground water extraction well and performance of ground water aquifer pumping <br /> tests The location of the site is illustrated in Figure 1 A plan of the site, including existing wells, <br /> is illustrated on Figure 2 A tentative schedule for completion of the proposed scope of work is <br /> I• included in Appendix A <br /> This work plan has been prepared at the request of the property owner to expedite the closure <br /> process The work plan is prepared m accordance with the Central Valley Regional Water Quality <br /> Control Board (CVRWQCB) Tri-Regional Board Staff Recommendations for Preliminary <br /> Evaluation and Investigation of Underground Tank Sites <br /> 2.0. BACKGROUND <br /> IThe Comfort Air facility is a heating and air conditioning sales and repair business located at 1607 <br /> Turnpike Road, Stockton, California, in an area of low topographic relief in southwestern Stockton <br /> 21 UNDERGROUND STORAGE TANK REMOVAL <br /> One <br /> 550-gallon gasoline(UST)was removed from the site in January 1989 Following tank removal, <br /> g <br /> soil samples were collected beneath the UST and submitted to a laboratory for analysis for petroleum <br /> Ihydrocarbons Total petroleum hydrocarbons as gasoline (TPH-g) was reported in soil samples at <br /> concentrations as high as 5,800 rriilligranis per kilogram(mg/kg) <br /> • <br /> I <br />