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TAE 1 - CHECKLIST OF REQUIRED`3ATA
<br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES
<br /> Site Name and Location: Woodbridge Partners Inc. (AKA Victor Meats), 18846 N. Hwy 99, Lodi, San Joaquin County �
<br /> 0 I. Distance to production wells for municipal, domestic, agriculture, No municipal supply wells and 77 domestic &
<br /> industry and other uses within 2000 feet of the site; agricultural wells are located within 2000 feet of the
<br /> site.
<br /> 2. Site maps, to scale, of area impacted showing locations of former and existing tank One 8,000-gallon gasoline, one
<br /> systems, excavation contours and sample locations, boring and monitoring well elevation 12,000-gallon diesel and one 550-
<br /> contours, gradients, and nearby surface waters, buildings, streets, and subsurface gallon waste oil USTs were
<br /> removed 8/00.
<br /> utilities;
<br /> 3. Figures depicting lithology(cross section), treatment system diagrams; Site lithology consists of sand,silt and clay.
<br /> The total depth investigated was 55 feet;El _
<br /> 4. Stockpiled soil disposed off-site(quantity);
<br /> The fate of the excavate soil was not reported.
<br /> 0 5. Monitoring wells remaining on-site, fate; One monitoring well(MW-1)installed for this investigation, will be
<br /> abandoned.
<br /> Y 6. Tabulated results of all groundwater elevations and depfhs.to waterThe depth to water varied from 48 to 52 feet.
<br /> ,
<br /> --_ - _ — - Regional=groundwater flow-direction=was-to-the---- _
<br /> northwest.
<br /> 7.Tabulated results of all sampling and
<br /> In 8/00, maximum soil results were: TPHg(1,200 mg/kg), TPHd
<br /> analyses: (18,000 mg/kg), ethylbenzene(1.3 mg/kg),xylenes(7 mg/kg), and MtBE
<br /> Y (0.31 mg/kg). Boring soil results in 5/01 were TPHd(1,550 mg/kg),
<br /> Detection limits for confirmation sampling ethylbenzene(0.45 mg/kg), and xylenes(0.135 mg/kg). Groundwater
<br /> N Lead analyses results were ND from in 10/01 through 6/04.
<br /> 0 8. Concentration contours of contaminants found and those remaining in soil
<br /> d groundwater, both o - •te and off-site: The extent of contamination is defined by
<br /> Y Y
<br /> Latera!and Vertical extent of soil contamination soil borings and monitoring well.
<br /> Lateral and Vertical extent of groundwater contamination
<br /> Q9. Zone of influence calculated and assumptions used for subsurface Based on the limited extent of
<br /> remediation system and the zone of capture attained for the soil and contamination, an engineered remediation
<br /> groundwater remediation system, system was not required at this site.
<br /> 10.Reports/information 0 Unauthorized Release Form 9 7 QMRs(10/01 to 6/04)
<br /> Y❑ Boring logs PAR FRP 1 Other.
<br /> 11.Best Available Technology(BAT)used or an explanation for not using BA T'- Remove USTs and natural attenuation.
<br /> 12.Reasons why background wads No contamination was found in groundwater. Minor soil contamination
<br /> unattainable using BA T; remains on-site. i
<br /> Y� 13.Mass balance calculation of substance The consultant estimates 414 gallons of TPHd soil contamination remains
<br /> treated versus that remaining; onsite.
<br /> N 14.-A ssumptrons,'parameters,°calculations:and model risk assessment was not required.
<br /> used in risk assessments, and fate and transport -T — =i- - -�--•— __
<br /> modeling,and �~
<br /> 0 15. Rationale why conditions remaining at site will not Soil contamination is limited in extent, and based on 7 quarters of
<br /> adversely impact water quality, health, or other non-detect groundwater monitoring results, contamination is not
<br /> beneficial uses. leaching to groundwater. .
<br /> By: Comments: One 8,000-gallon gasoline, one 12,000-gallon diesel and one 550-gallon waste oil USTs were removed 8/00
<br /> JLB from the subject site. in 8/00, maximum soil results were: TPHg(1,200 mg/kg), TPHd(18,000 mg/kg), ethylbenzene
<br /> (1,3 mg/kg), xylenes(7 mg/kg), and MtBE(0.31 mg/kg). Boring soil results in 5/01 were TPHd(1,550 mg/kg),
<br /> Date: ethylbenzene(0.45 mg/kg), and xylenes(0.135 mg/kg). Groundwater results were ND'from in 10/01 through 6/04. Based
<br /> on the limited extent of soil contamination and decreasing contaminant concentrations in groundwater, Regional Board
<br /> 2/23/05 staff concur with San Joaquin County's Closure Recommendation.
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