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SU0000019 SSCRPT
Environmental Health - Public
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SU0000019 SSCRPT
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Last modified
5/7/2020 11:27:33 AM
Creation date
9/6/2019 10:56:40 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2600 - Land Use Program
FileName_PostFix
SSCRPT
RECORD_ID
SU0000019
PE
2622
FACILITY_NAME
MS-01-26
STREET_NUMBER
6425
Direction
W
STREET_NAME
LINNE
STREET_TYPE
RD
City
TRACY
Zip
95376
ENTERED_DATE
8/8/2001 12:00:00 AM
SITE_LOCATION
6425 W LINNE RD
RECEIVED_DATE
7/19/2001 12:00:00 AM
P_LOCATION
99
P_DISTRICT
004
QC Status
Approved
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SJGOV\rtan
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\MIGRATIONS\L\LINNE\6425\MS-01-26\SU0000019\SSC RPT.PDF
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EHD - Public
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was no evidence of solid waste disposal and the site was carefully inspected for environmental <br /> concerns originating from discolored,disturbed/subsided soils, stressed vegetation or <br /> unusual/noxious odors. None of these environmental indicators were present. There are no <br /> hazardous materials stored on-site and there was no indication or observations of spills, drums or <br /> other items associated with hazardous materials. <br /> An important concern associated with the environmental assessment of agricultural properties is <br /> the issue of buried pesticide containers or discarded items. It was an occasional practice to <br /> dispose of containers by this method many years ago. To detect these types of underground <br /> artifacts is difficult even with the use of ground penetrating radar or other types of non-intrusive, <br /> subsurface analyses. The land surface did not exhibit visual indicators for buried containers such <br /> as surfacing of product residue, soil mounding or soil depressions, particularly in the Remainder <br /> area that is currently planted in beans. It is usually only after a contaminant plume has impacted <br /> a domestic well that pesticide containers are discovered. <br /> The groundwater table is located approximately 8 tol4 feet under the property. This is <br /> considered a very shallow groundwater elevation. Shallow, or high a groundwater table can be <br /> impacted easier from pesticides or nitrogen in the form of nitrates. The groundwater directional <br /> flow appears to be directly toward the north and then continues northeast as depicted on the <br /> attached Lines of Equal Elevation Map, published by the County Flood Control Department in <br /> 1992. <br /> As illustrated on the attached USDA Soil map, the predominate soil type over the property is <br /> Stomar clay loam (252). This soil type would be conducive to greater biological activity which <br /> would promote the degradation of organic molecules such as insecticides and herbicides. <br /> Additionally, a finer soil type such as a clay loam may promote denitrification and attenuate the <br /> downward migration of nitrate. <br /> Since the subject property has been in agricultural production for several years, an evaluation of <br /> environmental fate data for agrichemical residues as a nonpoint source of potential contamination <br /> was performed. The science of pesticide residues in soil, air, surface water and groundwater is <br /> extremely complex and variable. Environmental models which attempt to predict pesticide <br /> behavior and transport in the environment are beyond the scope of this investigation. It has been <br /> clearly evident over the last five decades that the risk/benefit ratio regarding pesticides has been <br /> overwhelming benefit and comparatively low risk to the United States population and the <br /> environment, as a whole. <br /> .Environmental fate data that exists only for those pesticides which were applied to the subject <br /> parcel are documented below. This list illustrates the half-lives of the pesticides that are listed, <br /> are comparatively fast. Data was obtained from the Illustrated Handbook of Physical-Chemical <br /> Properties and Environmental_Fate for Organic Pesticide Chemicals: <br /> Page -3- <br /> Va%y Ag Research <br />
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