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3500 - Local Oversight Program
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PR0544727
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Last modified
8/1/2019 4:45:32 PM
Creation date
8/1/2019 4:21:40 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
RECORD_ID
PR0544727
PE
3528
FACILITY_ID
FA0003830
FACILITY_NAME
VILLAGE WEST MARINA
STREET_NUMBER
6649
STREET_NAME
EMBARCADERO
STREET_TYPE
DR
City
STOCKTON
Zip
95219
APN
09815006
CURRENT_STATUS
02
SITE_LOCATION
6649 EMBARCADERO DR
P_LOCATION
01
P_DISTRICT
002
QC Status
Approved
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w, <br /> > ,.- . (BTEX) by EPA Method 8020. Detectable, primarily fractional BTEX analytes were detected <br /> only in soil samples collected from MW-6. The highest TPH-g result was 39 mg/Kg, revealed <br /> in the sample collected from MW-6 at 15 feet bsg. TRPH-d results were nondetectable except <br /> for 8 mg/Kg of weathered diesel revealed in the sample collected from MW-5 at 5 feet. <br /> Ground water had been encountered during the drilling of each boring at a depth of <br /> approximately 18 feet bsg. Two-inch-diameter, Schedule 40 PVC well casing with 0.020-inch <br /> factory slots was placed from 30 to 10 feet in each well. A threaded end cap was installed on <br /> each bottom. Two-inch-diameter, blank, Schedule 40 PVC casing was extended from the top <br /> of the screen at 10 feet bsg to a few inches below surface grade (bsg). <br /> ' Number 3 Monterey sand was used as filter pack and was placed to extend from the bottom of <br /> the wells to approximately one foot above the screened interval in the annular space of each well <br /> (30-9 feet bsg). The bentonite seals at 9 to 71h feet bsg were hydrated with five gallons of <br /> :> potable water. Portland cement was pumped into the remaining annular space above the <br /> bentonite seals to extend from 71h feet to 1 foot bsg in each well. Locking caps were placed <br /> on top of the well casings inside 8-inch, water-tight street boxes cemented into place at the <br /> surface. <br /> j Monitoring wells MW-4, MW-5, and MW-6 were developed on June 20, 1994 using a stainless <br /> steel bailer. Bailing removed turbid water from the wells until clear water appeared. The <br /> monitoring wells were sampled after a minimum of 50 gallons were bailed and the ground-water <br /> :. levels had recovered to at least 90% of their static levels. <br /> Monitoring wells MW-4, MW-5, and MW-6 were first sounded on June 24, 1994. Utilizing a <br /> Keck'`'""' interface probe, the W.W. Irwin, Inc. staff technician intercepted the piezometric surface <br /> in each well at a depth averaging 14.82 feet bsg. The soundings were converted using well <br /> casing-top elevations established on June 13, 1994 by Duane Kimball, Modesto-based, <br /> California-licensed Land Surveyor No. 4378. The elevation data were used to calculate the <br /> present ground-water flow direction and gradient by the three-point method. <br /> Ground-water samples collected from MW-4, MW-5, and MW-6 were received at Sherwood <br /> "-1 Labs on June 21, 1994. The analytical results revealed wholly nondetectable concentrations of <br /> TRPH-d analytes and nondetectable results for TPH-g and BTEX analytes in samples collected <br /> from wells MW-4 and MW-5. The results of the analysis of the sample collected from MW-6 <br /> indicated that the ground water underlying that vicinity was significantly impacted with TPH-g <br /> and BTEX analytes well above the Maximum Contamination Levels (MCLS) set by the <br /> California Department of Health Services. <br /> .: w,W.f.vb%&C. <br /> -- ' Project No.33016.06 <br /> Oclobec 1995 5 <br />
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