Laserfiche WebLink
Work Plan Addendum - May 2001 <br /> CHARLIE'S DAY & NITE <br /> 706 North El Dorado Street, Stockton, California <br /> 1.0. IN'T'RODUCTION <br /> At the request of Mr. Charles Skobrak,Advanced GcoEnvironmental, Inc. (AGE) has prepared the <br /> enclosed work plan addendum for the Charlie's Day & Nite site located at 706 North El Dorado <br /> Street, Stockton, California. The location of the site is illustrated on Figure 1. A plan of the site is <br /> illustrated on Figure 2. <br /> This addendum has been prepared as required by the San Joaquin County Public Health Services - <br /> Environrnental Health Division (PHS-EHD) by letter dated 31 December 1997 to assess an <br /> unauthorized release of petroleum hydrocarbon compounds from underground storage tanks(USTs) <br /> formerly located at the site. Additionally, this work plan addendum is prepared in accordance with <br /> Central Valley Regional Water Quality Control Board(CVRWQCB)guidelines for the investigation <br /> of UST sites. <br /> The purpose of this additional site assessment is to complete the assessment of the lateral and <br /> vertical extent of petroleum hydrocarbon impacted groundwater in the northwestern and southern <br /> portions of the site. This work plan addendum provides a description of the scope of work and <br /> procedures to be used in soil probe borings,soil and groundwater sample collection and analysis,and <br /> soil boring abandonment. <br /> 2.0. BACKGROUND <br /> Two 4,000-gallon USTs were removed from the southeastern portion of the site on 10 June 1997; <br /> reportedly, the USTs had not been in operation since at least 1978. Petroleum hydrocarbons were <br /> detected in the sample collected beneath the western end of the southern UST at a concentration of <br /> 11,000 ppm. Hydrocarbons were not detected in the three remaining samples collected beneath the <br /> USTs or from one sample collected beneath "dispenser#1". The PHS-EHD subsequently required <br /> investigation to determine the extent of impacted soil and ground water. <br /> Between October and November 1998, six soil probe borings were advanced at the site. Probe <br /> borings Bl, B2 and B3 were advanced to depths of 64,30 and 45 feet bsg, respectively; borings 134, <br /> B5 and Bb were advanced to depths of 35, 35 and 30 feet bsg, respectively. Following the collection <br /> of the 35-foot-bsg soil samples in borings B 1 and B3 and the 30-foot-bsg soil samples in borings B2, <br /> 134, B5 and 136, a grab water sample was collected from the active boring. The resulting analytical <br /> data showed that petroleum hydrocarbons were not detected in soil samples collected from depths <br /> of 25 and 30 feet bsg in boring B 1, advanced at the former USTs location. TPH-g was detected at <br /> concentrations of 3,700 ppm and 28 ppm in the soil samples collected from depths of 20 and 30 feet <br /> bsg in boring B3. Toluene, ethylbenzene and xylenes were detected in these samples at <br /> concentrations as high as 3.0 ppm,41 ppin and 120 ppm, respectively(B3-20). TPH-g was detected <br /> Advanced GeoEnvironrnental,ine. <br />