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TABLE 1 - CHECKLIST OF REQUIRED DATA
<br /> FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES
<br /> Site Name and Location Moore Truck Lines, 3400 Newton Road, Stockton, San Joaquin County (Case#391047)
<br /> y 1. Distance to production wells for municipal, domestic, agriculture, A 2010 sensitive receptor survey identified 10
<br /> industry and other uses within 2000 feet of the site. domestic and one municipal supply wells
<br /> within 2,000'of the Site. The nearest(Site)
<br /> well is 134'north of the USTs. None of the
<br /> wells are threatened by the release.
<br /> Y Site maps, to scale, of area impacted showing locations of any former and existing tank One 10,000-gallon
<br /> systems, excavation contours and sample locations, boring and monitoring well elevation gasoline, two 5,000-gallon
<br /> contours, gradients, and nearby surface waters, buildings, streets, and subsurface utilities, gasoline, and one
<br /> 500-gallon waste oil USTs
<br /> were removed 1199.
<br /> Y 3. Figures depicting lithology(cross section), treatment system diagrams; Site lithology consists of clay, silt, and sand
<br /> to 103 feet, the total depth investigated.
<br /> Y 4. Stockpiled soil remaining on-site or off-site disposal(quantity). Approximately 100 tons of soil was transported to
<br /> Forward Landfill in Manteca.
<br /> y 5. Monitoring wells remaining on-site, fate; Eight monitoring wells(MW-1 through MW-8) were properly abandoned
<br /> 518112.
<br /> 6. Tabulated results of all groundwater Depth to groundwater varied from 53 to 71 feet below ground surface
<br /> elevations and depths to water,' (bgs). The groundwater gradient varied from 0.001 to 0.007 ft/ft, and the
<br /> downgradient direction varied from northwest to west.
<br /> 7. Tabulated results of all sampling and All data adequately tabularized in various reports.
<br /> analyses.-
<br /> Detection
<br /> nalyses:Detection limits for confirmation sampling
<br /> Lead analyses
<br /> 8. Concentration contours of contaminants found and those remaining in soil and The extent of contamination is
<br /> groundwater, and both on-site and off-site: adequately defined by soil borings
<br /> and monitoring wells.
<br /> FYILateraland ElVertical extent of soil contamination
<br /> © Lateral and Q Vertical extent of groundwater contamination
<br /> 10 9. Zone of influence calculated and assumptions used for subsurface remediation system Approved active remediation was
<br /> and the zone of capture attained for the soil and groundwater remediation system; soil over-excavation
<br /> 10.Reports/information ❑Y Unauthorized Release Form [Y QMRS 26, from 3/01 to 8/11)
<br /> Well and boring logs E] PAR FRP ❑N Other,
<br /> Y 11.Best Available Technology(BAT) used or an explanation for not using BAT, USTs removal, over-excavation, and
<br /> natural attenuation.
<br /> Y 12.Reasons why background wash's unattainable using BAT, Minor residual soil and groundwater contamination
<br /> remain.
<br /> 7y 13.Mass balance calculation of substance treated versus Consultant estimates 1,749 lbs. of TPHg remains onsite in soil,
<br /> that remaining; and<1 gallon TPHg remains in groundwater.
<br /> N 14. Assumptions, parameters, calculations and model used in A risk assessment was not required as soil
<br /> risk assessments, and fate and transport modeling; contamination is not leaching sufficiently to threaten
<br /> the Site well, over-excavation (8'bgs to 14'bgs)limits
<br /> threats from direct contact, and the Site is over 90'from
<br /> the office and 30'from the shop.
<br /> y 15. Rationale why conditions remaining at site will not adversely Soil and groundwater contamination are limited in
<br /> impact water quality, health, or other beneficial uses;and extent. WQGs will be met by 2070.
<br /> By: JLB Comments: One 10,000-gallon gasoline, two 5,000-gallon gasoline, and one 500-gallon waste oil USTs were
<br /> removed 1199 at the subject site. Based upon evidence of a stable plume with declining concentrations, no
<br /> Date. threat to supply wells, limited risk of vapor intrusion or direct contact exposure, and limited extent of
<br /> 5/25/2012 contamination present in soil and groundwater, Regional Board staff recommends closure for the site.
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