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�������"' -a�a�.5 } "Q«�r•����.ap C'�•'"�.`w� ��5, 9�w�"-'lr���'����a.t �i ''r' � �'"' � � �5•,,�uG �.y, l *S p�`.� <br /> Y' <br /> ROM <br /> a <br /> &F <br /> \ til' <br /> March 31, 1992 <br /> Ms. Linda 1urkatte, R.E.H.S. APP I 1 `3:% <br /> Public Health Setvice/Environinental Health Division f_CaVlttDi�v t' r' t, •.., .r.l. �a <br /> San Joaquin County PEIR'"SII i <br /> 445 N.San Joaquin Street <br /> P.O. Box 2009 <br /> Stockton,CA 95201 <br /> Subject:Workplan for Installation of Three Groundwater Monitor Wells and Collection <br /> of Samples at 1045 W.Charter Way,Stockton,California. Site Code: 1779124 <br /> Dear Ms.Turkatte: <br /> Artesian Envirotum atal Consultants(Attesian)hL S been retained by Mr.Dante <br /> Nomellini,Attomey for Nomellini Construction Company,to install three groundwater <br /> monitor wells and collect soil and groundwater samples at I045 West Charter Way, <br /> Stockton,California(Figure 1). <br /> SITE DESCRIP'T'ION <br /> The site is located at 1045 West Charter Way,in Stockton,California. A site location <br /> ► map is'presented in Figure I. A site map showing the location of the site structure and <br /> former USTs is presented in Figure'-). <br /> BACKGROUND <br /> A Phase I Preliminary HazardouS Materials Site Assessm:nt(PSA)was prepared by <br /> Kleinfelderof Sueramento,California,and dated November 16, 1988, The PSA was <br /> prepared for Nomellini Constructicn Company,a construction and tool rental operator. <br /> Three underground storage tanks(USTs)were fomierly located at the subject site. The <br /> tank numbers,sizes,contents and histories were a5 follows: one 550 gallon waste oil <br /> tank was excavated and two l A)6 gallon fuel tanks(containing regular and unleaded <br /> gasoline)were excavated frons a%6arate site. The tank repotted to store unleaded <br /> ' a.,oline may also have held kerosene at one time. Analytical results of soil samples <br /> g" Y' Y �" p i <br /> collected heneath the tanks indicated that petroleum hydrocarbons and gasoline related ' <br /> ut, constituents wciv present in the soil beneath the two 1,000 gallon tanks. .Congutudttte <br /> were detected below lever of concern in the sample collected beneath the:waste.oil.tank;' <br /> Zy Results of this investigation were:presented in a Klehifelder repot?dated September 77, <br /> 1981.. <br /> According to the Kleinfelder Report dated June 14, 1989,additional soil was removed <br /> from the fuel tanks excavation on November 9,. 19138 to further assess the extent of <br /> petroleum hydrocarbon contamination, One section of the fonner tank pit was excavated <br /> to a depth of 19 feet from about l I feet below ground surft:;;e, Soil Samples were <br /> screened for organic vapors using a phatoiunization ciriector(PiD). Grgatnic vapor <br /> readings were detected at 408 parts per million(pum)from a sample collected at a depth <br /> of 19 feet within the fonner tank pit and 740 ppm from it sample collected 10 feet away <br /> from the excavation at a depth of 1G feet. llaacd un the positive organic vapor screening <br /> F <br /> WAZVW <br /> - .{._ <br />