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Advanced <br /> GeoEnvironmental, Inc . -v <br /> 07 May 2009 n <br /> AGE-NC Project No. 09-1688 W ECERED <br /> Ms. Margaret Lagorio MAY 1 1 2009 U <br /> San Joaquin County Environmental Health Department ENVIRONMENT HEALTH <br /> 600 East Main Street PERMUISERVICES <br /> Stockton, California 95202 <br /> Subject: Limited Subsurface Investigation Work Plan <br /> PADILLA PROPERTY <br /> 14749 North Thornton Road,Lodi, California <br /> Dear Ms. Lagorio: <br /> At the request of Ms. Mila Padilla, property owner,Advanced GeoEnvironmental, Inc. (AGE)has <br /> prepared the enclosed Limited Subsurface Investigation Work Plan for the above-referenced site.The <br /> work is being performed to investigate possible soil contamination caused by discharge of storm <br /> water run-off and/or unauthorized dumping of motor oil at the site. This work plan was prepared as <br /> required by the San Joaquin County Environmental Health Department for the procurement of a soil <br /> boring permit. The location of the site is illustrated on Figure 1. A plan of the site is illustrated on <br /> Figure 2. <br /> BACKGROUND <br /> It is our understanding storm water from the site formerly discharged into a small drainage <br /> immediately south of the property line via underground piping. Storm water was routed through <br /> various drains on the facility into a sump which eventually discharged to a drainage ditch owned by <br /> Raymond & B J. Coldani. Sometime in 2008, the drainage pipe was capped and discharge was <br /> discontinued,reportedly due to possible contamination near the discharge pipe outfall. <br /> Photographs of the area were provided by Ms. Mila Padilla to AGE for review. The photographs <br /> were reportedly collected around April 2008 and evidenced what appears to be surficial <br /> contamination frompetroleum hydrocarbons around the outfall piping and within the drainage canal. <br /> A sheen is also visible on the surface water in the canal.Additionally,water appears to have a bright <br /> green color — likely indicating the presence of anti-freeze; this shade of green is not generally a <br /> natural occurrence in water and appeared to be florescent. <br /> 837 Shaw Road, Stockton,California 95215 <br /> Telephone (209) 467-1006 Fax (209)467-1118 <br />