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ARCHIVED REPORTS XR0010095
EnvironmentalHealth
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ELEVENTH
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3500 - Local Oversight Program
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PR0544793
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ARCHIVED REPORTS XR0010095
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Last modified
11/19/2024 10:19:04 AM
Creation date
9/3/2019 1:35:53 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0010095
RECORD_ID
PR0544793
PE
3528
FACILITY_ID
FA0006237
FACILITY_NAME
HONEST AUTO SALE AND REPAIR
STREET_NUMBER
595
Direction
E
STREET_NAME
ELEVENTH
STREET_TYPE
ST
City
TRACY
Zip
95376
APN
23337004
CURRENT_STATUS
02
SITE_LOCATION
595 E ELEVENTH ST
P_LOCATION
03
P_DISTRICT
005
QC Status
Approved
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EHD - Public
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. Groundwater Sampling <br /> Each monitoring well was sampled Each monitoring well was purged by removing a calculated number of well <br /> volumes based upon the depth to water in each casing Depth to groundwater measurements were made to the <br /> nearest one-one hundredth of one foot, and also checked for the presence of separate phase product As each <br /> purge volume is removed, measurements of pH, electrical conductivity and temperature were taken until these <br /> parameters stabilize, which is interpreted as aquifer water entering the casing The sample was then carefully <br /> collected with a clean bailer and poured into the appropriate laboratory prepared container with mmimum <br /> cavitation Each water sample was labeled, logged onto a cham-of-custody form, and placed in a ice chest chilled <br /> with crushed ice Upon completion of well sampling,the well was closed and locked <br /> Subsurface Conditions <br /> Six exploratory soil borings were advanced on-site and off-site at the locations shown on Figure 1 The site is <br /> underlain by clayey soils, extend to depths of about 8- to 10 feet These soils are in turn underlain by interbedded <br /> sandy clay and clayey sand to depths of about 18- to 20-feet A sandy clay aquitard appears to underlie the entire <br /> area and is interpreted to be continuous in the region (see Figure 2) Permeability samples indicate that the <br /> aquifer is of moderately low permeability and the aquitard is of low permeability Groundwater was encountered <br /> in each borehole at depths of about 10-feet in the interbedded sandy clay and clayey sand strata Water appeared <br /> to be unconfined and to enter the boreholes slowly Depth to groundwater measurements yielded a northerly flow <br /> direction, under an estimated gradient of 0 003 Mstortc groundwater flow data indicates that the groundwater <br /> flow direction is northerly <br /> Chemical Analysis and Results <br /> Ten soil and seven groundwater samples were analyzed at a State certified analytical laboratory Selected samples <br /> were tested for the following, Total Petroleum hydrocarbons as Gasoline (TPHG), Benzene (B), Toluene (T), <br /> Ethylbenzene (E), Xylene (X), and Volatile Organic Compounds (VOC) using EPA Methods 8015, 8010, 8020 <br /> and 8240 Also, fuel oxygenates (including Methyl-tert-buytI-ether) were analyzed using EPA Method 8260 <br /> Additional testing was done for microbial activity, nitrate, sulfate, total iron, pH and physical testing for soil <br /> permeability The analytical reports are attached(see Appendix D)and listed below in Tables 1, 2 and 3 <br /> TABLE 1. SOIL BORING ORGANIC CHEMICAL DATA <br /> Sample No TPHG Benzene Toluene Ethylbenz Xylene Fuel Ox VOC• <br /> mglkg ug/kg ug/kg ug/kg ug/kg ug/kg ug/kg <br /> MW4-2 ND ND ND ND ND NR ND <br /> MW-4-3 ND ND ND ND ND ND ND <br /> MW-44 ND ND ND ND ND NR ND <br /> MW-5-2 ND ND ND ND ND NR ND <br /> MW-6-2 ND ND ND ND ND NR ND <br /> MW-8-2 ND ND ND ND ND NR ND <br /> MW-9-2 8 2 0 079 0 026 0 U 0 45 NR ND <br /> i <br /> Page 4 <br />
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