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x } <br /> - °' — <br /> r�; +�� � � .uw k �tip, .� ir:'< =�; �_r v� '.�°ry-fir• � "� 1 "'ytr• <br /> A <br /> i Aprii 5, 1991 <br /> Site Assessment Report Page 9 <br /> 139 South Canter,S=kton,CA --� <br /> r� <br /> Thj trw%ring wells were monitored On N`.3rch 8. 1991,prior to development and sampiing. <br /> monttoring data are presented In T&le 2. Appendix E prev3nts ft surveyors notes <br /> 111e well survey and <br /> (with(�eodetly Northings andPastin9s)and Appendix F presents ase wall gauging data,which was <br /> i made prior to,and following,the development of the molltortrl wells,on theappropriaterecord stmt <br /> i <br /> t TABLE 2-WELL SURVEY AND MONITORING DATA <br /> d'�Rr*taii d, �981 <br /> WELLHEAD ELEVATION DVTH-TO. HYDROSTATIC <br /> l WELL WATER <br /> NO (mean sea level <br /> 11.17 43.89 -32.72 <br /> a 3 <br /> MW-1 44.61 -32.85 <br /> PdIW_2 i 1.76 <br /> t44.28 -32.50 <br /> MW-311.78 <br /> MW-4 12.30 44.75 -32.45 <br /> t- (Shown in Feet) <br /> ' Appendix P(monitoring well data)for information conceming <br /> See DTW measurements at the Uma of sampling. <br /> rY <br /> onitoring-well development,groundwater samples were collectedOn March 8. v991 <br /> Following mwails were g � <br /> s : -4 <br /> from the four monitoring wells(MW-1,MW-2,MW-3 and MW ) The as Indicated by well nul"Itoring <br /> ` at least 8o percent of their original static water volume�fiorltection of sampling, <br /> groundwater <br /> sr <br /> t.e <br /> using an Interface Probe. This procedure <br /> allows for pending <br /> samples. The development water was collaarted In 55-galfan Meel drums and stored ons <br /> I proper disposal. <br /> lti <br /> Atter the welts had adequately recharged.groundwater samples were collected with an <br /> f <br /> g les to be analyzed fcr"pre.'yence of BT©(, <br /> EPA-approved disposable sampler. rocar ons(camp 1M vials, <br /> -4 were placed In 40-milliliter(ml)g <br /> r TPH-as-gasoline,and chlorlMled hydrocarbons(MW ) s These samples , <br /> acidified to ensure a pH belovr 2.0,then sealed with TeflonR septa cap ' Mani;sst to the Superior <br /> placed on ice in an Insulated cnoier,and transported under Chaln•:�f Cs tstody <br /> is <br /> Anaiytical Laboratory In Martinez,Califomia. <br /> » _,P&;GROUNDWATER <br /> INC- <br /> TECHNOLOGY, <br /> � <br /> I <br /> dllt��lll�llallRLl�fi�I�NR11ti4mmm�raiararsu cwcysylN ��E <br />