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UST Removal Report 2
<br /> Tho Southland Store#20632,4627 Davina Dr, CA December 11 1998
<br />' 3.2 Soil Sample Collection
<br /> On October 22, 1998, Fluor Daniel GTI personnel collected eight soil samples from the side walls of
<br />' the UST excavation One sod sample was collected at a depth of approximately 8 feet BGS at each
<br /> end of the three USTs and along the east and west UST pit side walls In addition, on October 28,
<br /> 1998,six sod samples were collected beneath the fuel dispenser at a depth of approximately 3 5 feet
<br /> BGS) On November 13, 1998 two additional sod samples were collected beneath the UST vent Imes
<br /> (Figure 2) All sod sampling was conducted at the direction of Mr Michael Kith of the SJCPHS Sod
<br /> samples were collected in 2-inch-diameter by 6-inch-long brass tubes directly from a backhoe bucket
<br /> Soil beneath the former USTs and dispenser island consisted of a dark gray to brown silty, clay to
<br /> approximately 10 feet BGS,followed by a brown clayey,silty sand to approximately to the depth of the
<br /> tank pit The sample tubes were sealed with Teflon pads, plastic caps and tape, labeled, placed on ice
<br /> in an insulated container, and submitted for analyses under chain-of-custody manifest to either state-
<br />, certified Acculabs Inc , in Davis, California or state-certified Core Laboratories in Anaheim,California
<br /> A total of fourteen sod samples, collected from the side walls of the UST excavation and beneath the
<br /> dispenser island,were analyzed for benzene,toluene, ethylbenzene,total xylenes(BTEX), methyl-tert-
<br />' butyl-ether(MTBE), and total petroleum hydrocarbons-as-gasoline (TPH-G) by EPA methods
<br /> 8020/8015 modified, for the oxygenates MTBE,tert butanol (TBA),diisopropyi ether(DIPS), ethyl-tert-
<br /> butyl ether(ETBE), and tert amylmethyl ether(TAME) by EPA method 8260,and for total lead using
<br />' EPA method 6010
<br /> 3.3 Water Sample Collection
<br /> MOn October 21, 1998, one water sample was taken from each of the 4,700-gallon baker tanks filled
<br /> with groundwater pumped from the UST pit Sampling of the baker tanks was authorized by Mr Harlin
<br /> Noll of the SJCPHS On October 22, 1998,one water sample was taken from the UST pit excavation
<br /> Sampling was conducted at the direction of Mr Michael Kith of the SJCPHS The water samples were
<br /> collected using disposable bailers Groundwater samples from the baker tanks and UST pit excavation
<br /> were placed In analysis-specific containers with analysis-specific preservative The samples were then
<br /> sealed using Teflon septum caps, labeled with the job Identification number,the sample number,date,
<br /> time, and type of laboratory analysis required The samples were stored on ice and transported with a
<br /> chain-of-custody record to state-certified Acculabs Inc ,in Davis,California Groundwater samples
<br /> from the baker tanks and UST pit excavation were analyzed for BTEX,MTBE, and TPH-G using EPA
<br /> methods 8020/modified 8015 , and total lead using EPA method 6010 Groundwater samples from the
<br /> UST pit excavation were also analyzed for the oxygenates MTBE, TBA, DIPE, ETRE, and TAME by
<br /> EPA method 8260
<br />' 4.0 RESULTS
<br /> 4.1 Geology
<br /> The relatively level sde is located at an elevation of approximately 2 feet above mean sea level
<br /> According to the California Division of Mines and Geology(Jennings, 1977)the site is underlain by
<br /> Quaternary alluvial deposits The materials encountered during recent drilling and during the UST pit
<br /> excavation at the site generally consisted of the alluvial silts and clays with some sands to the depths
<br /> explored
<br /> 20632ust.rAMW)
<br /> FLUOR DANIEL 6111
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