|
!�
<br /> �, �-� QBLE 1 -CHECKLIST OF REQUIRED DATA
<br /> �z FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES
<br /> Site Name and Location: Taylored Tours, 330 E. Kettleman Lane, Lodi, an Joaquin County
<br /> N 1.Distance to production wells for municipal, domestic, agriculture, industry ,! The County states that this is i soil case onlyr
<br /> and other uses within 2000 feet of the site; and groundwater and other drinking water
<br /> „ sources are not impacted. The site map shows
<br /> one well(function unknown)over 1,000 feet
<br /> southwest of the site.
<br /> Y❑ 2. Site maps, to scale, of area impacted showing locations of former and existing tank systems, One 250-gallon waste oil tank
<br /> was removed in 1988. Two
<br /> excavation contours and sample locations, boring and monitoring well elevation contours, diesel tanks(10,000 and 12,000-
<br /> gradients, and nearby surface waters, buildings, streets, and subsurface utilities; gallons)were removed in 1999.
<br /> No treatment system was used at the site.
<br /> 0 3. Figures depicting lifhology(cross section), treatment system diagrams;
<br /> ❑ 4. Stockplied soil remaining on-site or off-site disposal(quantify); and placea idtinon top ofmporte
<br /> l the tank pits i150 cubic ards of imacted d s was stockpiled
<br /> 'j I
<br /> Y❑ No monitoring wells were installed.
<br /> 5. Monitoring wells remaining on-site, fate;
<br /> Q 6. Tabulated results of all groundwater elevations and depths to water; Groundwater was not encountered during soil borings to
<br /> 25 feet bgs. Groundwater is estimated at 45 feet bgs. i
<br /> 7.Tabulated results of all sampling and analyses: In 1998, TPHd and xylene were detected in soil after removal of the US Ts and
<br /> Y❑ dispensers. The highest concentration of TPHd(13,000 mg/ig)and xylene Detection limits for confirmation_sampling (3.1 mg/kg)were detectediin soil six feet below the dispenser. In 1999,one soil-
<br /> Lead analyses boring, S8-1, was drilled in the center of tank pit to 20 feet bgs, whereas
<br /> 2,
<br /> another boring, SB- was installed in the location of the former dispenser to
<br /> 25 feet bgs. Soil samples!!were ND for TPHd,BTEX,and MtBE.
<br /> ❑ 8. Concentration contours of contaminants found and those remaining in soil x!
<br /> and groundwater, and bot -site and off-site:
<br /> y❑ Lateral and Y Vertical extent of soil contamination `
<br /> NA Latera!and NA Vertical extent of groundwater contamination ,a
<br /> 0 9.Zone of influence calculated and assumptions used for subsurface 'I No remediation system was used at the site.
<br /> remediation system and the zone of capture attained for the soil and Impacted soil was removed,stockpiled,and
<br /> groundwater remediation system; returned to the tank pits.
<br /> f
<br /> 0 10.Reports/information Y❑ Unauthorized Release Form NA MRs(Dates)
<br /> s
<br /> FY] We//and boring logs PAR Nq FRP 19 Other(report name)2/29/00 County Closure Summary
<br /> ❑ 11.Best Available Technology(BAT) used or an explanation for not using BAT The tanks were removed from the site.
<br /> NA 12.Reasons why background was/is unattainable using BAT; Y
<br /> ❑N i Contaminants were not detected during 1999 soil
<br /> 13.Mass balance calculation of substance Treated versus That remaining; 4,investigation.
<br /> .t
<br /> NA 14.Assumptions,parameters, calculations and model used in risk
<br /> assessments, and fate and transport modeling;
<br /> 15.Rationale why conditions remaining at site will not adversely Impacted soil was stockpiled before returning to the tank pit
<br /> impact wafer quality, health, or other beneficial uses;and Groundwater was not encountered nor impacted during tank
<br /> removal and soil boring investigation. Currently, the site is
<br /> capped with asphalt, which should prevent the migration of any
<br /> residual product.
<br /> ❑ 16.WET TCLP results
<br /> By. Comments.One waste oil tank was removed in 1988 and two diesel tanks were removed in 1999. High levels of TPHd and xylene
<br /> were detected when the diesel tanks were removed. impacted soil was stockpiled on-site and used to tap off imported soil in the
<br /> Dat : ` tank pits. Groundwater was not encountered when two soil borings were advanced to 20 and 25 feet. TPHd,BTEX,nor MtBE were
<br /> i Z ��J detected in soil samples from the borings. Based on current site conditions and the absence of contaminants in site soil,staff
<br /> 3 concurs with the San Joaquin County closure recommendation. #
<br /> }
<br /> 4
<br />
|