Laserfiche WebLink
. B.\WORKPLAN.DOC <br /> SI'= SaCURIT7i <br /> v <br /> ,Tkw site is completely fenced in by,a seven foot high security <br /> fence, also barricades with lights have been placed atoUnd this <br /> excavation in case unathorised persons gain access to the site. <br /> EgCAVAZ) SOIL <br /> All excavated soil piles are covered with a 6 mil polyethylene <br /> ,,nor to prevent any uncontrolled aeration and possibility of . <br /> leaching of contaminants from this soil in the event of exposure <br /> to moisture (rain) A permit to aerate excavated soil pile SP4 <br /> has been applied for; San Joaquin County Air Pollution Control <br /> District "Application For Authorization of Uncontrolled Soil <br /> Aeration" (see Appendix G). Methods for processing the remaining <br /> excavated soil piles are being evaluated (see Table 2 and Figure <br /> 5). <br /> PRIGA, SIM/RM ARMWMT <br /> Petroleum hydrocarbons have been detected at this site in the soil <br /> during the tank removal and the intial sampling of the tank <br /> excavation and product line trenchs. <br /> The following is the general risk appraisal for protection of <br /> � ~ grater quality, using LUFT manual guidelines. <br /> SM AM AREA CS <br /> MEAN AMR" INCHES OF PRECIPITATION 11.5", MANTECA <br /> GROUND WATER ELEVATION, FALL 1464 ;60 TO 70' AHSL <br /> SURFACE ELEVATION <br /> SURFACE TO GROUND WATER DEPTH APPROXI MATLEY 75-85' �,4 <br /> HIGHEST CONCENTRATIONS TPH 4500 PPM @ 15 DEPTH <br /> HIGHEST CONCENTRATIONS BENZENE 2300 PPM @ 15' DEPTH <br /> HIGHEST CONCENTRATIONS TOLUENE 2000 PPM @ 15' DEPTH <br /> � HIGHEST CONCENTRATIONS ETHYL BENZENE 180 PPPM @15' DEPTH <br /> DEPTH <br /> HIGHEST CONCENTRATIONS XYLENES <br /> HIGHEST CONCENTRATIONS OF ETHYLENE <br /> DIBROMIDE (EDB) <3.0 PPM <br /> HIGHEST CONCENTRATIONS OF ORGANO <br /> IAD (TEL) C5.0 PPM <br /> using table 2-1 from the LUFT manual a total point score of 48 is <br /> derived for this site, which indicates that the maximum lloleab <br /> le <br /> TPiI levels is 100 ppm gasoline range, 1000 ppmrange <br /> lass and the maximum allowable B/T/X/E levels are 3/.3/1/1/ppm <br /> for this site, see Appendix D. site risk assessment. <br /> The above "risk assessment" indicates that this site needs to be <br /> assessed in order to determine the vertical and lateral extent of <br /> . K the petroleum contamxnatants <br /> .-. <br /> Of special nate concerning this site are the following <br /> 3 <br />