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°nnt By: REGIONAL BOARD ANNEX; 916 2553164; Feb-10-04 14:44; Page 3/3 TA� E 1 - CHECKLIST OF REQUIRE"ATA FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES Si Name and Location: Owens Brockway, 14700 Schulta Road, Tracy, San Joaquin County A well receptor survey was not required. Two on-site f. Distance to production wells for municipal, domestic, agriculture, water supply wells are located within 1,000 feet of the Industry and other uses within 2000 feet of the site; former UST area. One 300-gallon UST was 2. Site maps, to scale, of area impacted showing locations of loaner and existing tank systems, removed in 5186. Site maps Y excavation contours and sample locations, boring and monitoring well elevation contours, are provided In the 3102 gradients, and nearby surface waters, buildings, streets, and subsurface utilities; investigation Report site lithology consists of clayey slit and silty 3. Figures depicting fithology(cross section), treatment system diagrams; clay to 18 feet, the total depth investigated. Tho disposition of excavated soil was not presented. The soils were 1 4. Stockpiled soil disposed off-site(quantity); likely returned to the tank pit excavations. --•J Monitoring wells were not Installed for the UST investigation. 5. Monitoring wells remaining on-site, fate; L Monitoring wells were not installed for the LIST 'W 6 Tabulated results of aN grcundwsterelevations and depths to water; i11vestIgatian. 7. Tabulated results of all sampling and analyses: Soil samples collected below the former UST showed TPHg at 3.9 mgikg, total BTEX at 0.60 mg/kg, and lead at 15.7 mgJkg. Two soil ©Defection limits for confirmation sampling samples from a single boring completed In 2102 were non-detect for all ©Lead analyses constituents Including MtBE at acceptable detection limits. ited 8. Concentration contours of contaminants found and those remaining in sod SS contamination samples p is coil to the former UST area, Soil samples collected at 10 and u and groundwater, both onsite and off-site: 14 feet were non-detect for all constituents. Y❑ Latel and Ya Vertical extent or soil contamination Groundwater was not encountered at a Lateral and ❑ Vertical extent of groundwater contamination total vertical depth of 18 feet Based on minor soil contamination at the 9. Zone of influence calculated and assumptions used for subsurface former UST area, site remedlation was not remediat(on system and the zone of capture attained for the soil and required. groundwater remediatfon system; 71 10.Reports/information y❑ Unauthorized Release Form El OMRs Boring logs N❑ PAR El FRP El investigation Report, 3/02 Y❑ - 11.Best Available Technology(BAT) used or an explanation for not using BAT; The UST was removed. 12.Reasons why background was/is Minor contamination remains in soil at the former UST area. The remalning V contamination does not present significant throat to groundwater- 7n using BAT; .. 13.Mass balance calculation of substance Based al the limited rem soil contamination tam I anon a at the former UST area, a (rested versus that remaining; mass balance of remaining soil contamination was not required. Based on the limited soil contamination Identified at the 7N14. Assumptions, parameters, calculations and model used In risk former UST area, a risk assessment was not required. assessments, and fate and transport modeling; former LIST 15. Rationale why conditions remaining at site will not adversely Minor The remlaining contaminationnabon remains in ti isn limited extent 7impact water quality, health. or other benaflcial uses. and does not present a significant threat to groundwater. gy. Comments: The site is an active glass manufacturing facility. In May 1986, one 300-gallon gasoline UST was removed MFI (rom the subject site, and one sol!sample collected from the tank pit excavation identified tow TPHg and BTEX constituents. in February 2002, two soil samples collected from an angle boring mit . and 20 feet (10 end 14 vertical leets were nvn-detect for ell consHfuents including MTBE at acceptable defection limits. The Owens Brockway Company utilizes Date: holding ponds for process water, and five monitoring we0s have been installed to monitor water quality and groundwater 613/02 flow direction renting to the hold/ng ponds. The depth to water in these wells vades(rom 50 to 70 leaf, and the calculetod flow direction is to the northeast. Two on-site water supply welts are used for plant and Erre protection water,end are approximately 1,000 roef crass gratlient of the former UST ares. Based on the limited soil contamination Identified at this site. and the depth to Ursf groundwater at 50 Leet, Board staff concur w)th San Joaquin County's closure rocommendetion. 02/10/2004 TUE 15: 14 ITX/RX NO 84201 Z003