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ARCHIVED REPORTS_XR0003807
Environmental Health - Public
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3500 - Local Oversight Program
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PR0545428
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ARCHIVED REPORTS_XR0003807
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Last modified
3/9/2020 8:18:18 PM
Creation date
3/9/2020 10:07:44 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0003807
RECORD_ID
PR0545428
PE
3528
FACILITY_ID
FA0005487
FACILITY_NAME
MARCIS DIESEL SERVICE
STREET_NUMBER
2969
STREET_NAME
LOOMIS
STREET_TYPE
RD
City
STOCKTON
Zip
95205
CURRENT_STATUS
02
SITE_LOCATION
2969 LOOMIS RD
P_LOCATION
01
P_DISTRICT
001
QC Status
Approved
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EHD - Public
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r <br /> r <br /> ag <br /> e t o aw o MMount <br /> The contamination profile shown in <br /> ure 5 indicates to have been very small . <br /> Charts B and C above show that no contamination was found in <br /> ' the water itself. These tests were taken one month apart by <br /> Del Tech, after bailing the wells down Temperature, pH and <br /> conductivity were all measured as an indicator that <br /> ' formation water was being pulled into the well . Del Tech <br /> data sheets are appended. <br /> ' Water levels also were measured both times that the water <br /> was sampled, using an electric probe locater. The water <br /> levels and the direction of the hydraulic gradient are shown <br /> on Figure 6 . The gradient slopes to the west, almost exactly <br /> ' opposite to that ind Gated t e reg onal ma s shown in the <br /> appended work plan TMhe slope ma bus over /10 of <br /> one a ce foweve the ape increased sl gh ly be een <br /> ' �measure en s . Also, the wa er levels measured are somewh t <br /> ighet n an is pa ed. ase data Yndi ate (1 } hat the <br /> wa eable i risin sI tly in h s -area, and <br /> ' recharge is mare of ec ve inx an, e6as erl dire tion. ` h s <br /> o e due eibhe o local 'c�h"anges in he ate- 'o p roping <br /> of area el o a d e ante in perco a - F- S . ny <br /> event, mo_n for ,el s 2 a d� 3 arr'e riot l'ocate'd in a d=own-- <br /> ' g r'a"�d�ie�n d i rye c.�ti <br /> I <br /> Inasmuch as contaminants were not found in the water samples <br /> from any of the three wells, particularly those from MW # 1 , <br /> it is unlikely that free product ever reached the water <br /> table . However, as noted above, a small amount of TPH--D was <br /> ' found in the soil sample from 77 ' to 78 1/2 ' in MW # 1 , <br /> probably reaching there by percolation in the vadose zone <br /> during a time of lower water elevation. Reldri'Pu'se1 Mfz, esAe <br /> data t�he�r�e , ex�is*t�s a pos�sibi,El ity that same �co{ntamwinants were <br /> esteEMM0by the �s�ng wa er ta�b�le, in a direction <br /> where no monitor- wee�l' 1 sr arseN r <br /> 1 ocated <br /> ' CONCLUSIONS <br /> 1 . The contaminants found in MW # 1 soil samples are too <br /> deep to be excavated unless a very large area were to be <br /> ' excavated, with a ramp dug, permitting a back hoe to enter <br /> the excavation. It is the opinion of the writer that such an <br /> operation is not warranted. <br /> 2 - Thee co°r—minants f0 rid-x MSW # l soil samples are <br /> relatively`°low`°and owing Ye- <br /> t the` clay formr�fi <br /> are, �not <br /> expected two -have migrated ,iate�ray ue ar''f� o�m the tank <br /> ' 1 ocati an . perhaips nn thle order of 30 ' maximum. ' Miere ore, <br /> the bariidg ofad ►diti�onal° holes for sampling and/or monitor <br /> wells is n -' - <br /> 3 . Owing to thclay formations that are common throughout <br /> the area to perhaps 150 ' bgl , water wells will never be <br /> 9 <br />
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