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i • f - "_ r <br /> 1 I ' y ' S r, ' 1 I r• _•• � • - , r J - ' i „ � rill <br /> ' Project 113-13 <br /> March 30,1993 <br /> Page 2 <br /> A fourth monitoring well was installed by Parker Environmental Services athe ' <br /> site <br /> on Se t <br /> September 6, 1991. Soil samples analyzed from the boring were all non-detect for <br /> TPH-g and BTEX. Groundwater samples obtained on September 11, 1991 from all <br /> = four nionitoring wells were also non-detect for,TPH-g and BTEX.SDepth to <br /> y i groundwater was 2$to 29 feet belowsurface.- , <br /> r Y ground <br /> (71 <br /> An`aquifer pump test was done by Parker Environmental Services at the site October k` <br /> r 15-16, 1991, and it showed that all four monitoring wells are m the same aquifer. <br /> At this-time no cleanup efforts have been implemented. Decisions concerning <br /> future investigations or remediation will be discussed after four quarterly <br /> monitoring reports are completed. - - <br /> _JL Current Actrvitie8 <br /> ' - <br /> 'Groundwater samples were obtained on March 17, 1993 Prior to sampling, r ` <br /> groundwater elevation measurements were obtained. Results are presented in the ' <br /> table below. <br /> ` Table 1, <br /> 'Cheaper,Store #76 <br /> '890 North Main Street, Manteca, California <br /> 3 - v Groundwater .Measurement,Results* i <br /> t ; <br /> Measured on March 17, 1993 <br /> r ~ y ' Y MW-3 'MW-4,mw-2 <br /> ' Weil Elevation ,, J •_33.12 33.22 i33.55 . <br /> 77 <br /> Depth to GW ` ` -24.82P ` 33 66 <br /> i - 24.70 F Y 25.10 : t ` -25.39 <br /> GW_Flev$tion y _ <br /> &30 - _8.52 - n g.45 827 <br /> elevation above mean sea level,-in feet <br /> / t/ t r� � J .. • . 1 4 <br /> " ti Shallow groundwater measurements indicate the water table is`approximately 4.1 <br /> 1 <br /> feet higher than measurements taken in-September,`1991. As,shown on the attached--,-r <br />' ' ' •=�groundwater flow.direction.drawing;=the'Eow:direction i_s'toward-the southeast <br /> d from ` ' - <br /> � unchange ,the Se_pteniber, T 991, measurements. .' "� ". ° ' - <br /> 4 S c' <br /> 1 ach monitorin well ' f r i- ; <br /> . r J`: � �k r g was purged`USingr an;e e tric ubm ible pump;prior to . J ` ` • 'T 45 <br /> . sampling: pproxiinatelyv 8 gallons vas 6%oVed, rQ eat equaled <br /> �j+�rell which <br /> IAve tor%ix well yolutrie's~ er, ell:All ur placed-in sealed metal 55 - - <br /> ., a :. W J P Se=water .i a al <br /> „ t1 gallon diiini{DC T�17H).'Af#e each-i+ri ^Was,puged,-t sample�was taken=using a <br /> aly =;'disposablePVC bailer:The water= as laced ` <br /> p f iti,three,;40 milliliter vials and a 1 liter =r <br /> �' :1 amber container Tilled 'so`that-there was.no air (head space) remaining'in ahem, r x <br /> 'Sannp1es�were,1ab*led;an0j),laced Qri iceiin a'�ooler fortransport to a state certified ' <br /> WFCaftfo <br /> T _,•+�Ma Q�ss� t .} ry, <br /> . aid ;�s}na erlals est ng 1*04tor~Cati bell AiWytical%d,- `aeheco, <br /> � . <br /> rnia.ILefoie the-next well vas purged and sampled, the pump was run in one <br /> bucket with ndrt-phosphate de*Wrgent�and two separate buckets with tap water. The r <br /> ' Parker Environmental Services 4185 Rialto Conrt Pittsburg CA 94565-6116 <br /> Phone (310) 439-1024 Fax (510) 439-2566 <br />