Laserfiche WebLink
t 1. <br /> ,r a <br /> CAMBRIA ~" r`I �k` <br /> I; ; _H,s <br /> C") JUL 2S P'4 12 d5 <br /> July 13, 1999 <br /> Mr Ron Rowe <br /> San Joaquin County Public Health Services <br /> P O Box 388 <br /> Stockton, California 95201 <br /> Re Over-excavation Work Plan <br /> Former Texaco Service Station <br /> 440 West Charter Way <br /> Stockton, California <br /> SAP Code 121258 <br /> Incident #88870583 <br /> Dear Mr Rowe <br /> Cambria Environmental Technology, Inc (Cambria) prepared this work plan on behalf of <br /> Equiva Services LLC to propose over-excavation activities associated with the tank, <br /> dispenser, and piping removal at the site referenced above The scope of work presented in <br /> this work plan complies with San Joaquin County Public Health Services (SJCPHS) and <br /> Regional Water Quality Control Board (RWQCB) guidelines <br /> SITE BACKGROUND <br /> Site Description The site is currently a non-operating gasoline station located on the <br /> southeast corner of Lincoln Street and West Charter Way in a mixed commercial and <br /> residential area of Stockton, California (Plate 1) The site layout consists of a service station <br /> building, two generations of dispenser islands, and an underground storage tank (UST) <br /> complex (Plate 2) <br /> Previous Investigations: During October 1988, two dispensers were removed and soil <br /> impacted by petroleum hydrocarbons was observed beneath the eastern dispenser during <br /> construction preparation activities Soil beneath this dispenser was excavated to an <br /> approximate depth of 15 feet below grade (fbg) Soil collected from the bottom of the <br /> o a k l a n d CA excavation contained total petroleum hydrocarbons as gasoline (TPHg) at concentrations <br /> Sonoma CA <br /> Portland OR ranging from 3 to 5,300 parts per million (ppm) and benzene at concentrations ranging from <br /> Seattle WA not detected (ND) to 31 ppm This investigation is described in the October 9, 1990 <br /> Environmental Assessment Status Report written by Groundwater Technology, Inc (GTI) of <br /> Cambria <br /> Environmental West Sacramento, California <br /> Technology,Inc <br /> In May 1989, GTI drilled four vertical soil borings (SB-1 through SB-4) and one angle soil <br /> �erkms Street <br /> boring (AB-3) onsite During May 1989, February 1990, April 1990 and May 1990, GTI <br /> P o 80x 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(7o7)935-6649 <br />