SITE INFORMATION AND CORRESPONDENCE_FILE 2

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TABLE 1 - CHECKLIST OF REQUIRED DATA FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES Site Name and Location: Unifirst Corporation, 819 N. Hunter Street, Stockton, San Joaquin County(#391153) Y 1. Distance to production wells for municipal, domestic, agriculture, industry and Port of Stockton and 4 municipal wells within 2 miles. None threatened. other uses within 2000 feet of the site; Y 2. Site maps, to scale, of area impacted showing locations of any former and existing tank systems, In Site Cleanup Program file. excavation contours and sample locations, boring and monitoring well elevation contours, gradients, and nearby surface waters, buildings, streets, and subsurface utilities; Lithologic figures included in reports. Y 3. Figures depicting lithology(cross section), treatment system diagrams; Y 4. Stockpiled soil remaining on-site or off-site disposal(quantity); No soil from UST removal remains on site. N 5. Monitoring wells remaining on-site, fate; All site monitoring wells to remain and be used for existing VOC problem, 6. Tabulated results of all groundwater elevations and depths to water, Contained in groundwater monitoring reports. Y1 7. Tabulated results of all sampling and analyses: Adequate in-reports. Y]Detection limits for confirmation sampling FY]Lead analyses 8. Concentration contours of contaminants found and those remaining in soil Found in reports. and groundwater, and both on-site and off-site: Y❑ Lateral and Y❑ Vertical extent of soil contamination © Lateral and © Vertical extent of groundwater contamination 9. Zone of influence calculated and assumptions used for subsurface Not applicable. Natural attenuation adequate to remediation system and the zone of capture attained for the soil and eliminate impacts. groundwater remediation system; 10.Reports/information FYI Unauthorized Release Form QMRs Y❑ Well and boring logs FYI PAR FYI FRPa Subsurface Investigation Y 11.Best Available Technology(BAT) used or an explanation for riot using BAT; UST and impacted soil removal and removal of impacted water and product and natural attenuation adequate to protect receptors. N 12.Reasons why background wasris unattainable using BAT; Water quality objectives met. - 13.Mass balance calculation of substance treated versus that remaining; 350 tons of impacted soil and 30,000 gallons of impacted water and product removed. Due to minimal impacts no residual mass calculations performed. N1 14. Assumptions,parameters, calculations and model used in No modeling performed or necessary for this site. risk assessments, and fate and transport modeling; 15. Rationale why conditions remaining at site will not adversely Minimal residual contamination and will continue to attenuate. Y impact water quality, health, or other beneficial uses;and By: JI Comments: One 2,500-gallon heating oil UST removed. Several hundred(350+)tons of impacted soil and 30,000 gallons of water Date:7/126/10 and product removed from the site.. Soil and groundwater investigations determined extent.UST and impacted soil and water removal and natural attenuation adequate to protect water quality and human health and safety. This site poses no threat and qualifies for low-risk closure.