# APPENHIX C-1
SITE-SPECIFIC FLEXIBILITY REQUEST MODIFIED LIST OF DETECTION MONITORING PARAMETERS

BRYAN A. STIRRAT & ASSOCIATES

# SITE-SPECIFIC FLEXIBILITY REQUEST MODIFIED LIST OF DETECTION MONITORING PARAMETERS

PICACHO SOLID WASTE SITE IMPERIAL COUNTY , CALIFORNIA February 2008 Revised August 2010

PREPARED FOR: Bryan A. Stirrat & 

## Associates 1360 Valley Vista Drive Diamond Bar, California 91765

PREPARED BY: GeoLogic Associates 

# G.

· ses oOc -,.LT

# 9 saic 16885 W. Bernardo Drive**~** 

### :.1 

## San Diego, California 92127

## SITE-SPECIFIC FLEXIBILITY REQUEST MODIFIED LIST OF DETECTION MONITORING PARAMETERS PICACHO SOLID WASTE SITE IMPERIAL COUNTY, CALIFORNIA


## The Picacho Solid Waste Site (PSWS) is located on federally-administered Quechan Tribal lands in the County of hnperial (County), California. Although California is a U.S. Environmental Protection Agency (EPA) approved state, because the facility is located on Tribal lands, which are held in trust by the federal government, the site is subject to the code of federal regulations (CFR) 40 CFR Part 258 ( 40 CFR 258), which regulates solid waste facilities. Any variations from the federal regulations must be approved by the EPA through the site-specific flexibility process. This process was developed by the EPA and described in a document entitled, Site Specific Flexibility Requests for Municipal Solid Waste Landfills in Indian Country- Draft Guidance (EPA, August 1997). Included in this guidance document are the requirements and instructions for preparing a site-specific flexibility request (SSFR) for modifying the list of groundwater monitoring parameters from those specified in 40 CFR 258.54(a).
On behalf of Imperial County Department of Public Works (County), which operates the PSWS, GeoLogic Associates (GLA) has prepared this SSFR to modify the list of detection monitoring parameters provided in 40 CFR 258.54(a)(1) and (2). This SSFR was prepared based on information summarized in semiannual water quality monitoring reports prepared by GLA for the County, including the most recent first semiannual2007 10 and annual report dated April2010, and the EPA (August, 1997) SSFR guidance document.
1.0 BACKGROUND


## The PSWS groundwater monitoring network includes four wells (P-MW-1, P-MW-2, P-DW-3A, and P-MW-4) constructed in August 1994 (Figure 1). Initially, because California is an EPA-approved State regulating solid waste facilities within the State, the site was thought to fall under the jurisdiction of the California Regional Water Quality Control Board

- Colorado River Basin Region, and site monitoring was performed in accordance with site-specific Waste Discharge Requirement No. 88-005, and the more recent blanket Waste Discharge Requirements No. 93-071, established for all active landfills within the Colorado River Basin Region and prepared to comply with federal regulations. Under this program, the wells have been monitored by the County typically on a semiannual basis beginning in November 1994. Monitoring included well P-DW-3A until March 1999 when this well, which is located in the site borrow area, was converted to a water level measuring station and sampling and analysis of groundwater from this well ceased. The monitoring program has included analysis of volatile organic compounds (VOCs) and inorganic constituents including chloride, nitrate as nitrogen, pH, sulfate and total dissolved solids, as well as field measured electrical conductivity.

## In 

## contrast with 40 CFR 258, which requires sampling and analysis for its Appendix II list of constituents of concern (COCs) only if a release is identified, in accordance with California regulations, the current three-well monitoring network has been sampled every five years (in 1996, 2001, and 2006) for analysis of the Appendix I and Appendix II list of COCs. The current procedures provide historical water quality data for the full suite of COCs and are therefore more protective of water quality than the approach outlined in 40 CFR 258. Accordingly, the semiannual detection monitoring program complies with EPA regulation 40 CFR 258.54(a) to include the constituents listed in Appendix I, with the exception of the 15 heavy metals, which are included in the sampling program every 5 years. In accordance with 40 CFR 258.54(a)(2) and the SSFR guidance document, an alternate list of inorganic indicator parameters may be established in lieu of the 15 heavy metals included in Appendix I. 

## The following section provides a discussion of the site groundwater chemistry and a request to include inorganic indicator parameters in lieu of the 15 heavy metals in Appendix I. A change in the anthropogenic constituent list (VOCs) is not proposed

. 

# 2.0 SITE HYDROGEOLOGIC CONDITIONS Currently, more than 15 years of semiannual groundwater monitoring data have been obtained from the detection monitoring wells at the PSWS, with several sampling rounds that include analysis of samples for the full suite of 40 CFR 258 Appendix II COCs. Groundwater occurs at a depth of 180 to 200 feet below the ground surface, with variations in groundwater elevations of less than 0.5 foot across the entire site, resulting in a very low groundwater gradient ofless than 0.0004 ft/ft. Most recently, well P-MW-1 or P-MW-4 have been the most upgradient well, though the differences between these wells vary by less than two tenths of a foot (Table 1). 

## Historically groundwater flows to the east to southeast, altered primarily by an occasional heavy influx of flow in the adjacent wash and associated infiltration.
General Chemistry. As presented in Tables 2 through 5, the general chemistry data indicate a relatively narrow range of values across the site (GLA, April2010). Median chloride concentrations range from about 110 to 140 mg/L; nitrate as nitrogen median values range from 1.9 to 2.5 mg/L; median pH values exhibit slightly basic conditions ranging from 7.9 to 8.1; median sulfate concentrations range from 86 mg/L to 109 mg/L and median total dissolved solids (TDS) concentrations range from about 540 to 622 mg/L

.. Only nitrate as nitrogen has a federal primary Maximum Contaminant Level (MCL) established for protection of drinking water quality, and the measured values at the PSWS are well below the MCL of 10 mg!L for this constituent. As a measure of the aesthetic water quality, federal secondary MCLs (SMCLs) are established as drinking water quality goals for public water systems for chloride, sulfate and TDS. Comparison of the median values measured in groundwater samples at the PSWS with the federal SMCLs indicates that only TDS concentrations slightly exceed the SMCL of 500 mg/L.

M:\2001>-120\SSFR_GW MON PARAMETERS.DOC 

## -2-

## Heavy Metals. Based on the COC sampling rounds conducted at the PSWS, heavy metals are generally not detected in groundwater samples. Well P-MW-1 has been sampled six times for the 17 heavy metals listed in Appendices I and II. Of these, only arsenic and selenium have been measured three times in samples (Table 2). Other metals including barium, chromium, lead, mercury, tin, vanadium and zinc have been measured one or two times, but none above a federal MCL. Only arsenic values of0.012 to 0.014 mg/L slightly exceed the federal MCL of 0.010 mg/L.
Well P-MW-2 has been sampled three times for the 17 COC metals, and only chromium was measured in samples from this well three times (Table 3). Barium, copper, thallium, vanadium and zinc were measured one or two times at quantifiable or estimated trace levels (between the laboratory method detection limit and practical quantitation limit), and no value exceeded a federal MCL.
Well P-DW-3A has only been sampled one time for COCs (in 1996), and only chromium, tin and vanadium were detected during the sampling round though all three metal concentrations were low (Table 4). The measured chromium concentration was well below its federal MCL.
Well P-MW-4, sampled three times for the COC metals, contained measurable chromium in all three sampling events (Table 5). The other detected heavy metals include barium, lead, tin, vanadium, and zinc, in one or two of the samples at quantifiable or estimated trace levels, and all were well below an established federal MCL.
Volatile Organic Compounds. Several VOCs have been detected in samples at the PSWS, but only chloroform in samples from well P-MW -1 

## has been measured with any regularity. Concentrations of chloroform measured in samples from well P-MW-1 have ranged from 0.46 Jlg/L to 1.4 JlgiL, substantially below the federal MCL of 80 !Jg/L. Other detected VOCs include acetone, benzene, toluene, methylene chloride and chloromethane, which are common field or laboratory contaminants, and typically have been measured erratically in samples at estimated trace concentrations. A few VOCs such as dichlorodifluoromethane, trichlorofluoromethane, 4-methyl-2-pentanone (MIBK), 1,2,3-trichlorobenzene and naphthalene have been detected, also erratically, in samples and may be attributed to the landfill.
Other anthropogenic compounds. Every five years groundwater samples have been analyzed for the COCs listed in 40 CFR 258 Appendix II including organochlorine pesticides, chlorinated herbicides, semi-volatile organic compounds and polychlorinated biphenyls. To date, results of these sample analyses have not identified any of these compounds in groundwater samples at the PSWS. The next 5-year COC sampling event is scheduled to be conducted during the Winter/Spring 2011 sampling event.


# 3.0 ALTERNATIVE MONITORING PARAMETER LIST
The current alternative list of monitoring parameters complies with 40 CFR 258 with the exception that the inorganic indicator parameters (chloride, nitrate as nitrogen, pH[field

M:\20llfi.120\SSFR

_GW MON PARAMETERS.DOC 

## -3-

## measured], electrical conductivity [field measured], sulfate, and TDS) are proposed in lieu of the 15 heavy metals included in 40 CFR 258 Appendix I, with the exception of arsenic, which may be present associated with pesticides. We request replacement of these 15 heavy metals with the inorganic indicator parameters currently included in the site's detection monitoring program on the following grounds:

0 

## In our experience regarding the chemical composition of municipal solid waste leachate, and landfill impacted groundwater in southern California particularly, heavy metals are generally poor indicators of a release since many occur naturally, and exhibit significant spatial variability across a site. In 

## fact, of the heavy metals included in 40 CFR 258 Appendices I and II, as presented in Section 2.0 above, only a few typically have been found in quantifiable concentrations that could be differentiated from background water quality.

0 

## Heavy metals are not typically very mobile unless subjected to highly acidic conditions, and under normal conditions such as expected at the PSWS, would tend to adsorb to soil particles before reaching the groundwater more than 150 feet below the bottom of the waste, making them poor early indicators of a release relative to VOCs and more mobile inorganic metal surrogates.

0 

## As stated, review of the metals data indicates few quantifiable values. In 

## contrast, the inorganic indicator parameters are commonly identified and the abundant historical data allow for robust conclusions based on statistical and deterministic analysis of that data. The extremely low concentrations and sporadic frequency of detection of the heavy metals precludes thorough analysis and determination of a release. Similarly, the pH values for leachate are often more acidic than identified in groundwater samples at the PSWS. When there are statistically significant changes in the proposed indicator parameters, indications of a release may be recognized. Therefore, it is recommended that, with the exception of arsenic, the heavy metals be removed from the routine semiannual detection monitoring program. Arsenic was detected in groundwater samples from well P-MW-1 in 1994 and 1995 and may be associated with pesticides. Because this well is located in close proximity to the former pesticide container disposal pit, arsenic will be added to the list of monitoring parameters.The VOCs will continue to be included in the monitoring program, since they are anthropogenic and in the absence of other local sources are diagnostic of a landfill release to groundwater either by leachate or landfill gas migration.
In summary, to provide the earliest possible indication of release from the landfill, it is requested that the proposed water quality monitoring program includes analysis of groundwater samples for the inorganic indicator parameters (chloride, nitrate as nitrogen, pH, electrical conductivity, sulfate and TDS) in lieu of the 40 CFR 258 Appendix I heavy metals, with the exception of arsenic, which will be added to the list of monitoring parameters. In 

## addition, at a minimum, the detection monitoring program will continue to include the 40 CFR 258 Appendix I VOCs. The proposed list of monitoring

M:\2006-120\SSFR_GW MON PARAMETERS.DOC 

## -4-

## parameters provides good indicators of changing water chemistry potentially associated with the release of leachate, pesticides, or landfill gas to groundwater at the site.
It is also proposed that analysis continue to be conducted for the 40 CPR 258 Appendix II list of COCs every five years as required under California regulations as a further conservative approach to protection of water quality at the PSWS.


# 4.0 CLOSURE
This report has not been prepared for use by parties or projects other than those named or described herein. It may not contain sufficient information for other parties or purposes.
If 

## you have any questions regarding this request for an alternative list of monitoring parameters, please give me a call. Geo-Logic Associates



# ~(~ Sarah J. 

## Battelle, PG, CHG Project Manager

M:\2006-120\SSFR_GW MON PARAMETERS.DOC 

## -5-

### TABLE! SITE MONITORING WELL INFORMATION PICACHO SOLID WASTE SITE
WELL INFORMATION WELL NUMBER P-MW-1 P-MW-2 P-DW-3A Elevation of well (ft MSL): Top of wen casing 339.82 316.43 318.13 Total deDth of wen (ft): at installation 212.1 191.6 193.0 Depth of screened interval 193.5-208.5 174-189 175-190 Depth to water from top of well casing (ft) : 11/17/94 203

. 17 179.84 181.42 4121/95 203.82 180.59 182.17 7/21195 203

. 34 180.01 181.60 1111/95 203.12 179.71 181.29 7/3/96 204.36 180.96 182.56 9126/96 202.55 178.95 181.65 12/20/96 202.42 178.96 180.58 7/9/97 202.45 178.75 180.35 9117/97 202.00 178.20 179.90 12122/97 201.85 l78.30 179.90 3/17/98 201.98 178.58 180.21 6/16/98 201.72 178.15 179.80 

### 8/12198 201.70 178.03 179

. 70 12/21/98 201.60 178.06 179.68 3/3/99 201.53 178.10 179.75 6/3/99 201.73 178.33 180.00 8/3/99 201.76 178.29 179.91 11/18/99 201.51 177.96 179.61 2117/00 201.79 178.50 180.13 5/12/00 201.89 178.46 180.12 8/21/00 201.38 177.85 179.48 12/9/00 201.56 178.20 179.84 2/17/01 201.87 178.66 180.29 5/10/01 202.11 178.85 180.47 8/16/01 201.80 178.37 180.03 ll/11/01 201.75 178.40 180.02 2/5/02 202.07 178

. 96 180.59 5/5/02 202

. 45 179.22 180.85 8/14/02 202

. 25 178.94 180.56 11118/02 202.45 179.23 180.86 2/16/03 202.60 179.54 181.16 5/11/03 202.72 179.45 181.07 8/21/03 202.46 179.05 180.71 12/30/03 202.43 179.13 180.74 4/27/04 201.81 179.34 181.10 8/9/04 202.48 179.08 1 81.14 2/15/05 202

. 74 )79.57 182.91 9/13/05 202.95 179

. 81 181.33 2/20/06 202.26 180

.04 1 81.71 8121/06 202

.98 179.74 1 81.42 2/19/07 203.44 180.31 181.90 8/9/07 203.24 179

.98 181.59 2/26/08 203.63 180.54 1 82.21 8/12/08 203.07 179.55 181.21 6/15/09 203.04 179

. 86 1 81.44 9/21/09 203. 16 179.81 1 81.43 2/16/10 203.73 180

.54 1 82.19 8/16/LO 203.42 179.86 181.34

D:\SUMMER\FALL\PICACHO\PJCLEV.xls\1011112010 P-MW-4
334.96 210.1 192-207
198.41 199.10 198.59 198.37 199

. 67 197.70 197

.57 197

. 62 197.15 197

. 10 197

. 21 196.83 196

. 86 196.85 196

.70 196.95 196.96 196.73 197.06 197.10 196

. 56 196.81 197.15 197.37 197.03 196

. 99 197.40 197

. 70 197.49 197.72 1 97.60 197.95 197.67 197

. 66 197.86 197.70 199

.78 198

. 15 198

. 65 198

. 19 198

. 64 198.49 198.91 198.20 198.20 198.07 198.78 198.61

### TABLEt SITE MONITORING WELL INFORMATION PICACHO SOLID WASTE SITE
WELL INFORMATION WELL NUMBER P-MW-1 P-MW-2 P-DW-3A Elevation of water surface (ft MSL): 11117/94 136.65 136.59 136.71 4/21/95 136.00 135.84 135.96 7/21195 136.48 )36.42

.136.53 1111195 136.70 136.72 136.84 7/3/96 1 35.46 135.47 135.57 9/26/96 137.27 137.48 136.48 12/20/96 137.40 137.47 137.55 7/9/97 1

. 37.37 137.68 137.78 9/17/97 137.82 138.23 138.23 12/22/97 137.97 138.13 138.23 3/17/98 137.84 137.85 137.92 6/16/98 138.10 138.28 138.33 8/12/98 138.12 )38.40 138.43 12/21198 138.22 138.37 1 38.45 3/3/99 138.29 138.33 138.38 6/3/99 ! 38.09 138.10 138.13 8/3/99 1 38.06 138.14 138.22 11118/99 1 38.31 138.47 138.52 2117/00 138.03 137.93 138.00 5/12/00 1 37.93 137.97 1 38.01 8/21100 138.44 138.58 138.65 12/9/00 " 138.26 138.23 "138.29 2117/01 137.95 137.77 137.84 5110/01 137.71 137.58 137.66 8116/01 138.02 138.06 1 38.10 11111101 138.07 138.03 138.11 2/5/02 137.75 137.47 137.54 5/5/02 1 37.37 137.21 137.28 8/14/02 137.57 137.49 137.57 11118/02 1 37.37 137.20 137.27 2/16/03 137.22 136.89 136.97 5111103 137.10 136.98 137.06 8/21103 137.36 137.38 137.42 12/30/03 137.39 137.30 137.39 4/27/04 1 38.01 137.09 1 37.03 8/9/04 137.34 137.35 136.99 2/15/05 137.08 136.86 135.22 

### 9113105 136.87 136.62 1.36.80 2/20/06 137.56 136.39 1 36.42 8/21106 1 36.84 136.69 136.71 2119/07 136.38 136.12 1 36.23 8/9/07 136.58 136.45 136.54 2/26/08 1 36.19 135.89 1 35.92 8/12/08 136.75 136.88 136.92 6/15/09 136.78 136.57 136.69 9/13/09 1 36.66 136.62 136.70 2116110 136.09 135.89 1 35.94 8/16/10 136.40 136.57 13 6.79

D:\SUMMER\FALL\PICACHO\PICLEV,Jjls\1012112010 P-MW-4

136.55 135.86 )36.37 136.59 135.29 137.26 137.39 1 37.34 137.81 137.86 137.75 138.13 ) 38.10 138.11 138.26 138.01 138.00 138.23 137.90 137.86 138.40 138.15 137

. 81 137.59 137.93 137.97 137.56 137.26 137.47 137.24 137.36 137.Dl 137.29 137.30 137.10 137.26 135.18 136.81 1 36.31 1 36.77 136.32 136.47 136.05 136.76 136.76 136.89 136.18 136.35

### TABLE 2 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-1 Nov Nov Jul Jul Nov Jul ANALYTE UNIT 1994 1994 1995 1995 1995 1996 GENERAL CHEMISTRY Bicarbonate Alkalinity mg/1 NA NA NA. NA NA NA Carbonate Alkalinity_ mg/1 NA NA. NA NA NA NA Chloride mJU'l 120 120 110 110 11 0 130 Cyanide mg/1 0.02 NA 0.02 NA

. 0

. 02 0,03 Hydroxide Alkalinity mg/1 NA NA

. NA NA · NA 

### NA Nitrate as N mg/1 l.7 1.9 2.1 2.4 2.4 2

. 11 pH units 8.2 8.2 8.1 8

. 2 8

. 0 8

. 20 Perchlorate mg/1 NA.. NA NA NA NA NA Specific Conductance umhos/cm NA NA NA NA 

## NA 1010 Sulfate mg/1 130 130 120 110 11 0 124 Sulfide mg/1 I NA I NA I 0.55 Total Dis so lved Solids mg/1 710 710 1200 1000 650 646 METALS Antimony mg/1 NA NA NA NA NA

. 0.005 Arseni o mg/1 0.014 NA 0.012 NA 0.014 0.005 Barium mg/1 0

. 14 NA 0.02

**N~ ·**  , 0.02 0.1 .;• Beryllium mg/L 0.02 NA 0.02 NA o : o2 !).001 Cadmium mg/1 0.02 ' NA 0.02 NAI

**~ ~**  0.02 I 0.003 Chromium mg/1 0

. 02 NA 0.02 NA 0.02 

# ' 0.007 Cobalt mg/1 0.05 NA 0 :05 NA 0.05 ' 0.003 Copper mg/1 0.02

**~** NA 0.02 NA 0.02 l 0

. 003 Lead rru:IJ 0

.003 NA 0.002 NA 0.00! 0

. 005 Mercury mg/J 0.0005 NA

. 0.0002 NA -; 0.0002 0.002 Nickel mg/1 0.05 '•· NA 0.05 NA, 0

. 05 0.003 Selenium mg/1 0.007 NA 0

. 008 NA 0.008 0.005 Silver mg/1 0.02 1 NA 0.02 NA 1 0.02 

### 0

.001 Thallium mgll 0.2 NA 0.2 NA

**~** 0

. 005 Tm mg/1 0.1 NA 0.1 NA 

## OJ. 0.039 Vanadium mg/1 0.05 NA 0.05 NA 0.05 0.003 ' Zinc mg/1 0.07 

### NA 0

. 05 NA 0.05 0.01 VOLATILE ORGANICS/PURGEABLE ORGANICS I ,2 .3- Trichlorobenzene IJ,g/l ND NA 

### ' ND NA 

### ' ND ND Acetone IJ,g/1 I NA 3.0 "' NA 

### 8 

### l ; 2 Benzene [.lg/1 ND

. NA ND

.. , NA ND .._ 

### No Chloroform j.l,g/1 I ' NA 1 NA 1.0 1.2 Chloromethane IJ,g/1 

### ND " NA ND NA 

## No ' ND Dich1orodif\uoromethane IJ,g/l I NA

. 1 NA 

## •

**~** 0.3 Methylene Chloride j.lg/1 I 

## NA l NA ,. 

### l• 0

. 2 Naphthalen e _j.l g/1 N9 • NA_ 

### ND ' NA ND 

### ' ND Toluene IJ,g/1 

### I NA 

### l< N!\ I 1.7 Trichlorofluoromethane IJ,_g/1 

### L NA I NA I ' 0 , 2 SEMI- VOLATILE ORGANICS: None Detected HERBICIDES. PESTICIDES. & PCBs: None Detected
NOTES:

**~Sample** was not analyzed for thi s parameter during the s pecified sa mpling round

. 

## 0 Indicates th at the analyte was not detected above laboratory practic al quantitation limit ( PQL)

. Value listed is MDL or estimated lCace conce ntration (SOLOED), 

### [BQJ Constituent n o t detected; MDL not provided ,



### * Analyte also round in blank(s).

**D:\SU~IER\FALL\PlCACHO\PICMWI xls\l012l/2010**  Jul Sept Sept Jul 1996 1996 1996 1997

NA NA NA NA NA NA NA NA l30 120 120 120 NA NA NA NA NA ' NA NA NA 2.11 2

. 39 2.52 2.13 8.18 6

.23 6.39 7 .62 NA ' NA NA

- NA l0 07 NA NA 

## NA

121 117 115 73 NA · NA NA NA 646 568 560 624

NA NA NA NA NA

. NA · NA NA n NA NA NA I NA NA 1 NA NA NA NA.,. 

### - NA NA 

# - NA NA NA NA •J NA NA NA NA NA • NA NA NA l NA NA , NA NA " NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 

### NA ' NA 

### N.A NA NA NA NA ' NA , NA NA NA 

## NA NA NA NA NA NA

NA 

### No NA 

### liiD NA 1.2 NA 1.2 NA ND NA ND NA 0

. 9 NA 1.1 NA

- •, ND NA <" ND NA 

### Q.3 NA • 0.3 NA 0.2 NA 0

. 2 NA ' ND NA ND NA

**~** 0.3 NA 0.3 NA 

### 0.3 )'.lA 0

. 2ANALYTE GENERAL CHEMISTRY Bicarbonate Alkalinity 

### TABLE2 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-1 (CONT'D)

UNIT Jul 

### 1997 Jul 

### 1997 Jul 

### 1997 Sept 

### 1997 Sept 

### 1997 Sept 

### 1997 Sept 

### 1997 Mar 

### 1998 Jun** 

### 1998

Carbonate Alkalinity mg/1 NA NA NA \ NA**NA ~**  NA NA NA 1 NA Chloride mg/1 1 18 115 120 92 

### 95 93 84 116NA Cyanide m2/l NA NA NM NA NA NA N A NA ··· NA Hydroxide Alka\ioitv mJdl NA N/\ NA**-~** NA NA NA NA NA

. NA Nitrate as N ml!

. ll 2

. 19 2

.0 L9 

### 1.0 0

. 96 1.01 1.15 2.6 NA pH units 7

. 58 7.59 7.61 8

. 14 8.22 8 , 18 8

.26 7

. 9 3 NA Perchlorate mg/1 NA • NA NA

. ' NA NA ,, , NA NA NA NA ' Specific Conductance umbos/em 

### NA • NA NA NA NA

. NA · NA NA NA Sulfate midi 73 73 73 60 63 58 48 11 4 NA Sulfide mg/1 NA / NA**~~** NA NA · NA NA NA ' NA · NA Total Dissolved Solids mg/1 602 614 604 466 464 466 432 613 NA METALS Antimony midi NA NA NA NA NA NA

. NA NA NA Arsenic mg/1 

### NA NA 

### NA NA NA NA 

### NA NA NA Barium mg/1 NA**I~** NAi NA 

### <:; NA NA · NA NA NA**·~** NA Beryllium mg/1 

### NA

., NA NA**NA** 

### NA NA NA NA NA Cadmium 

### mJdl NA NA NA NA NA NA NA NA NA Chromium 

### mJdl h\ A , NA NA NA NA NA NA 

### NA. NA Cobalt mg/1 NA NA 

## NA. NA.**·~** NA NA NA NA NA Copper mg/1 NA NA 

### NA

. NA NA NA Lead mg/1 

### NA "**'~** NA N An NA NA NA r>.' NA 

### NA Mercurv 

### mJdl NA NA ' NA NA ' 

### NA NA NA NA



### . NA Nickel mg/1 NA

. NA 

### NA NA NA 

### NA NA NA NA Selenium mg/1 lilA NA NA



### . NA NA NA 

### NA NA NA Silver mg/1 NA NA NA · 

### MA NA 

### NA Thallium mg/L NA NA NA "" 

### NA NA



### . NA NA NA ' 

### '' NA Tin ffil!/1 N A NA 

### NA NA. NA 

### NA NA NA 

### NA Vanadium mg/1 NA

. ' NA , NA NA NA NA 

### NA NA ·' NA Zinc mg/1 NA ,' NA NA 

### NA NA NA 

### NA NA NA VOLATILE ORGANICS/PURGEABLE ORGANICS 1 , 2 , 3-Trichlorobenzene ugfl NA NA NA 

### ND NA 

### NA NA ND ND Acetone ugfl J:)! A NA NA NA I 

### NA NA 5 .75 5.75 Benzene ugfl NA**.~:** NA •.··· NA "' ND NA 

### NA NA ND ' ND Jun** 

### 1998**N~** NA ,. NA NA NA

NA NA NA NA '· NA NA I

NA NA NA NA NA NA 

### NA NA NA 

### NA NA NA NA NA NA 

### NA NA

ND 5

. 75 ND Chloroform ug/1 NA NA il 

### NA. 0 .6 NA 

### NA ' N A 1.3* 1.2* L5 * Chloromethane ug/1 NA NA NA ND ,.,- 

### NA Dichlorodifluoromethane ugfl NA 

### NA: NA ;; 0.3 NJI; Methylene Chloride ug/1 NA NA NA 0 :2 NA Naphthalene ug/1 NA NA NA 

### ND NA Toluene ug/1 NA NA**N~** 0.3 NA Trichlorofluoromethane ug/1 NA NA NA 0

.2 ' NA SEMI- VOLATIL

. E ORGANICS: None Detected HERBICIDES PESTICIDES & PCBs: None Detected
NOTES :**~Sample** was not analyzed ror this parameter during the specified sampling round.
c::Jindicates that the analyte was not detected above laboratory practical quantitation limit (PQL)

. Value listed is MDL or estimated trace concentration (BOLDED). 

### lB:QJ Constituent not detected; MDL not provided.

(a) Suspected laboratory/field contaminant. 

### * Analyte also found in blnnk(s)

. 

### ** Retest

.

D:\SUI\IMER\FALL\PICACHO\PIC\tWJ.xls\10/21/2010 NA 

### NA NO ND NO "" NA 

### NA 0 :09 0.09 0.09 

### NA 

### NA 0.08 0.19* 0.08 

### NA NA NO ND ND • 

### Ji.rA " NA 

# om om 

# om NA N/\ 

### 0.07

. O.o? 0.07ANALYTE GENERAL CHEMISTRY Bicarbonate Al k alinity Catbonate AI 

### ka I

in i

. rv Chloride Cyunide Hydroxide Alknlinity NitlilteasN pH Perchlorate Specific Co ndu ctnn cc Su l fate Sulfide Tota l Diss o lved

.Solids METALS Antimony Arsenic Barium Beryllium Cadmium Chromi um Cobalt Coppe r L

en d Mercury 

### TABLE2 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-1 (CO NT' D) Aug 

### Dec "• Aug Aug 

### Nov• • Nov •• UNI T 1998 19!)8 1999 1999 1999 1999 mg/ 1 NA_\-1 I NA 

### N"A'- NA NA o N 1\**m~/1** 

# NW · NA 

### N • J!I.,, N'A' NA 

### N'A c 

## • mw'l 119 

## NJI\ 105 

### !04 

### NA'! tifA:t mg/1 

### NiV 

## ,, NA

. I'll\

. NA 

### ' NA**N~ ~**  

### .· mg/1 NN I 

### NA ' .!·; 

### NN NA: 

## NA**_** 

### m.l!ll 2.7 

### Ni\ 1

. 80 

### 1.52**NIX ~**  -:o. 

### NA- '· units 8.38 

### NA 8.03 NA··'' 8.06**N~ l**  

### mJI/1 

### N'A N/i NA**~** 

### NA: NA •**~A ~Lmhos/em** **N~** 

### Ntl !022 

### N A<" 1040 

### NA\ mg/1 N'/i. 

### 'f:'A hf)\( NA , NA NA 

### mw'l NA NA 

### N
· A· 

### NN NA '>**llti\ ~**  mg/1 

### 620 N}6. 574 580 NA
· 1 ' 

### N N! mg/1 NA**NA '~'** **~** 

## N N 

## NA l'JA mg/1**N~ NA** **~> N~**  NA >**NA ~**  

### NR:. mJ.!II 

### NAt

- NA ]IrA ' 

### JlfA ' , NA " NA! m).!/1**N~ i**  

### Ni\ '-" N U!**N"~ ;**  

### WA ,-**"** mgll Nt\ \ N

. N i 

### NA C.**~** 

### NA -.1' 

### 'SA 'll mg/1 Nl\ \ N l\ 

### N"A NA 

### NA: Nl;: mwl 

### NA '-'**N~ •**  

### NJ.\ \ 

## Nl<\' '·' NA 

### lii'A "·. m.llfl NA'

. NA 

### N I'V

• ' NAi 

### NA -· 

## NN mJ;fl 

### N& NA !'fA 

# NA NA**Ni\ ~**  mg/1 NA ,I 

### NIX 

### N:A NA N'A

. NA" Feb May*"' May *• Aug 2000 20110 2 000 200 0
NA' 

### NA• NA 

### N:<\**fl~ N.\\** **~** 

# NA N1\ · ! 14 NA 1 N.h\11 109 

## NA Ni\ 

## NA NA 

## NA< O'l 

## Nk NA N:A. 2.72 

### NA Ni\ 2.70 8.10 8.0 7 N:A. 8.04 

## NA NA I "• NA'- 

## NA 1018 1054 

## NA 981 

### NA: hrA**-~** 

### N:.<\ 

## NA

_ NA

' 

### N:tX

. ,,... NA: · 

## NA

559 

### N:A Nit. 694 

## NA NA: · NA ' 

### NA.' NiSl

. 'i' Nl\ ,**~ N~**  

### N

- & N 'i\

1ffr



### .**NA ~**  N"A:**N~ ~**  

### N'A • !\lA 

### NA:' " 

## I'!'**~** 

## NA ' Nt\:**N~ •**  N"A 'i< Ni'\: ., NA**~** 

### NA ' 

## Ni'\. N"A • NA '**~~** 

### NA •L 

## NA NA 

## NA**NAi ~**  

## NA NA Jii :R'" NAi NA 

### NA '**Nick~** I mg/1 

### NA ' NA ·,**NA ~~~**  

### NA • 

## NA Ill"

### A). 

### ' N

_ l\l 

### N\6. NA 

## NA: ' Selenium m).!/1 

### N'A'



### . N:A: N:A I ·"' 

### NA' 

### Iii'**~** Silver m.!VI NA 

### Nli,**i\ ~**  

## NK l Ni\

- Thallium m).!/ 1 

## NN NA 

### NA Tt 

### J:lrA'**~~** 

### l"ilA " Tin mg/1**~ ~;6;**  N"A

.. 

### NA:: NIX Vonadiu.m m.!Vl N&'**NA ~.**  

## N:A' ;- Nft**~** 

### NJ\ \ Zi nc 

### mlif l**N~ c**  L 

### N)X 

### NN N A. N :A: VOLATILE ORGANICSIPURGEABLE ORGANICS 1.2.3-Trich lorobt.'llzene 

### ).IJV'I ND 

### ND NOT"**N~ r**  

### till Acetone J,lg/1**~ts ·-•**  

### 5 !115;• 1 1:7

.

9 '**~** 

## Nk 1":79 : Benzene Ul":il 

### NB' ND 

### l r O

:OiifZ**N'A ~**  

# o : O¥ Ch loroform 

### uWI 1.4**-. 0.4~**  

### . !'10 :92!7 Nl\ • 

### 1 0 ,
_ 95

.

6 Chloromethane J.Lg/1 

### Nf.> 

### NO

. 

## .Nr> r**N~** .!l' 

### Na ' Dichlorodilluoromethane ).lg/1 0 !09 

### 4.6 0

. 07 ( NA: 

### M7 Metht.len e Chloride Iii

### !II 

## M.s• 2.0 

# o : oJ NA t**om ~**  Nup llllt alene 

### uwt Nf.>

. ND ND ' N:A " 

## NO Tolue11e 

### uJV'I O.(J7 ·• 

### 0;2J(il) 

## o:O'Ic Nl***O'.'ri7. ~**  Triehloroftuommcllmne J.l.l!ll 

## o:07 '· 0.{1 

## o : Q.4'-' N'A \. 0.® SEMI-VOLATILE ORGANICS: 

### None Detected HERBICIDES PESTICIDES, & P C B s : None Detected NOTBS :**~Sample** was not analyzed for this parameter during the specified sampling round.
0Indicates that the analyte was not detected above laboratory practical qunntitation limit (PQL)

. Value listed is MDL or estimated Lrace concentration (BOLDED). 

### l::EQJ Constituent not detected; MDL not provided.

(a) Suspected laboratory/field contaminant. 

### ** Retest.

D:\SUf\.V.fER\FALL\PICACHO\PICMWI.xls\10/21/2010 

## NA NA • _,; NA

. N M N K ' 

## NA: ,:.; N& NA '" N:A**1)1~** 

## NA

.**!)!;\ ~,** **N'i\ ~**  

### lilA NA N"A**N~ ~** **N~ ~**  

## NA:**N~** 

## NA NA 

## Nk N
·

A

• NA! ,, ""! 

### N ' A: •**~** 

### NA: ,
ND**~D** 'f 

### NliS i N"B l· 0'.<( 2.;. 1} )9**'.1 79** **~** 

## l:W 9'>· 2.03(3)**'( '19** **~** 

## o : oij ' 0.0' 5)- 

## o :os**-~ o.O"s** **·** I 0.05 l.JS 

### f 0 ! 82ll LOO 1.12**o:~l5** 

### l'ID i l'lFj • 

### 0> L4 "" 0.231(6') 0 :2.1 0 

## o.o1 •J

- 0

.0 9**{>.09 ~**  ' 

### o :o9 

### 0.09 : 

# o : o3

.O.IOf(a)**o6 r**  1 

## o:oG 

# ;**:06 ~**  

### ND

" 1 @ J



## . No • ' NQ • O.LO



# · o :oo , o ;0

_ 7.'< ' ():'07 "' 0.0, 7 t 

## 0.01. •·**"** 

### O.ll:l 

### 0:07 "' 0.07 0.07ANALYTE GENERAL CHEMISTRY Bicarbonate Alkalinity Carbonate Alkalinity Chloride Cyanide Hydroxide Alkalinity Nitrate as N pH Perchlorate Specific Conductance Sulfate Sulfide Total Dissolved Solids METALS Antimony Arsenic Barium Bervllium Cadmium Chromium Cobalt Copper Lead Mercury Nickel Selenium Silver Thallium Tin Vanadium Zinc 

### TABLE 2 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-1 (CONT'D) Aug Dec** Dec** Feb 

### May** May** UNIT 2000 2000 2000 2001 2001 2001 mg/1 NA

. NA NA I 178 NA NA m)1;/l NA NA 

## NA 10.0 I NA NA mg/1 110 NA. NA 127 NA NA mg/1 NA NA NA 0.0100 NA NA mg/1 NA NA NA 20.0 NA NA mg/1 2.68 NA NA 2.74 NA NA units NA 

### . 7 .96 NA 8

. 15 8.26 NA mg/1 NA. NA NA NA NA NA
: )lmhos/cm 

### NA l043 NA 992 1003 NA mg/1 NA NA NA 117 NA

. NA m)1;/l NA ' NA NA 0.750 NA NA mg/l 624 NA

**-~** NA 494 NA NA mg/1 NA NA NA 0.060 NA

. NA mg/1 NA NA NA 0.100

. NA NA mJ(/1 NA NA NA 0.0137 NA NA ml(/1 NA NA ''



### NA.. **~** O

.OQI NA NA mg/1 NA NA NA 0.010 NA NA mg/1 NA NA NA 0.010 NA NA mg/1 NA '·'' NA NA 0.007 ,, NA: NA mg/1 NA NA NA 0.010 NA NA mg/1 NA NA

. NA 0,075 NA NA mg! l NA NA

. NA 0.0002 NA NA mg/1 NA NA NA 0.030 NA NA mg/1 NA NA NA 0.100 NA NA mg/l NA NA. NA 0.007 NA NA mg/1 NA NA NA 0.100 NA NA mg/1 NA NA NA 0.250 NA NA mg/1 NA " NA NA 0.0103 NA NA mg/l NA NA NA 0.020 NA NA VOLATILE ORGANICS/PURGEABLE ORGANICS 1.2 , 3-Trichlorobenzene llg/] NA 0 .12 0.12 0.146 0.12 0.12 Acetone llg/1 NA 1.79 1.79 •• 1.79

**79** 1.79 Benzene ugfl NA 0.05 0.05 0

.05 0'.05 0

. 05 Aug Aug 2001 2001

NA NA 

### Nl\ NA , 

### ItO 110 NA NA NA NA 2

. 6 2

. 6 8.20 Nl\>

. NA NA 1002 NA NA NA NA NA 630 650

NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ' NA • NA. NA NA NA 

### NA NA NA NA NA NA NA NA NA. NA

0.080 NA 1.8 NA 0

. 050 NA Chloroform U!!ll NA 1.08 

### !.II 0.660 

### 0.7.01 0.838

. 0

.. 88 NA Chloromethane ll!!ll NA 0

. 14 0.14 0.14 Dichlorodifluoromethane llg/1 NA

**~** 0.09 0.09 0.09 Methylene Chloride )lg/1 NA 0.06 ' 0

. 06 0.06 Naphthalene ugfl NA 0.10 0.10 0.140 Toluene )lg/1 NA n 0

. 07 I 0.07 0.07 Trichlorofluoromethane IJ.g/1 No'\ Q.07 O.o7 0,07 SEMI- VOLATILE ORGANICS: None Detected HERBICIDES, PESTICIDES , & PCBs: None Detected
NOTES :

**~Sample** was not analyzed for this parameter during the specified sampling round.
0Indicates that the analyte was nor detected above laboratory practical quantitation Limit (PQL)

. Value listed is MDL or estimated trace concentration (BOLDED). (a) Suspected laboratory/field con1aminant

. 

### ** Retest.

0 :\llitJ-'t\1 f.tR\Jl'ALLU'ICa\CIIffir'IC:\l\\' I

.J

. b\IMU:.lO I D O l 14

**0.14 .~.**  0.18(a) NA 

### .... 0.09 0.09 0

. 090 > NA 0.06 0.06 0.060 NA 0.10 0.10 0!14 NA 0.07 0.07 0.070 NA 0,07 0.07 0.070 NA Nov** Nov** 2001 2001

NA NA NA NA NA NA NA NA NA NA NA NAo 8

. 13 NA NA NA 955 NA ' NA NA .NA NA NA NA

NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA · NA

- NA NA.. NA NA NA NA NA NA NA NA NA

0.080 0

. 080 1.8 1.8 0,050

. 0.050

**·~-.~ 0.93**  0.86 0.23(8) 0.14 0.090 0.090 0.060 0

. 060 0.10 

## o : ro 0.070 0

. 070 0.070 0.070ANALYTE GENERAL CHEMISTRY Bicarbonate Alkalinity C a rb ona te Alka linit v Chloride Cyani de H ydro xi de Alkalinity N itmteasN 

### _pH Perchlorate Sp ecific Conducta nce Sul fate Su l

fide T otal Dissolved Solids METALS Antimon y Arsenic B arium Beryllium C admium Chromiu m Cobalt Copper Lead 

### TABLE2 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-1 (CONT'D) Feb May ** May** Aug Nov** Nov** UNIT 2002 2002 2 002 2002 2002 2002 mg!l NA NA NA NA NA NA
mg/ 1 NA NA NA 

## NA NA NA mg/1 99 NA NA 130 NA NA mg/1 NA NA NA NA NA NA mg/1 NA NA NA NA NA NA
mg! l 2

. 5 NA NA 3

. 5 NA NA units 8

. 15 NA 8. 21 8

. 1 7 8.03 NA mg/1 NA NA NA NA NA NA •
u mb os/em 954 .NA 950 

### 965 998 1\(A

mg/1 

### NA NA NA t'!A NA NA mg/1 NA NA NA NA NA NA
mg/ 1 640 NA ' NA 710 NA NA mg/1 NA NA .NA NA NA NA mg/1 

### NA NA NA

**c~ ,**  NA NA NA mg/1 NA NA NA NA NA NA mg/ l NA NA NA NA NA N A mg/1 NA NA NA .Nt(o Ill NA NA mg/l NA NA NA NA NA NA mgfl i:'JA N'A NA NA NA - NA mg/1 NA NA NA NA NA NA mg/ 1 NA NA NA NA NA NA M ercu ry mg/1 NA NA NA NA

**~** NA NA Nickel rug! I NA NA NA
· NA Selenium mg/ 1 NA NA NA NA S il ver mg/1 NA NA 

### m NA NA Thallium mg/1 NA NA NA NA Tin mg/ l N _A NA NA NA V ana dium mg/1 NA NA NA 

## NA Zinc mg/1 NA NA NA NA VOLATILE ORGANICSIPURGEABLE ORGANICS 1.2. 3

-Trichloro ben zene U g/l 0.50 0.50 0 !5 0 0

. 50, Acetone j.lg/1 5

.0 5

.0 5

. 0 5.0 Benzene j.lj!/1 0 J 30 0

. 30 0

. 30 0 ;30 C hloroform j.lg!\ 1. 0 0

. 6 0

.7 0

.96 Chl oromethane j.lg/1 0

. 50 0.50 0.50 0.50 D ichlorodifluorometh ane U.!!/1 0.50 0.50 0

. 50 0.50 Methylene Chloride u g! l 0

. 50 0.50 0

. 50 0.18(aJ Naphth alen e j.l j!/

] 0

. 50 0.50 0 ! 50 0

. 50 Toluene u gff 0

. 30 0.30 0. 30 0

. 30 Trichlorofluoromethane U!l/1 0

. 50 0.50 0

. 50 

## MO SEMI-VOLATILE ORGANICS: None Detected HERBICIDES, PESTICIDES, & PCB s : None Detected
NOTES : (BeJ samp le was not analyzed for this parameter d uri ng the specified sa1npling round.
Oln dicates that the analyre Wi.IS not detected above laboratory practical quantitation limit (PQL)

. Value listed is MDL or e.'Himftted trace conce ntrat io n (BOLDED). (a) S uspected laboratory/field contamina nt. 

### ** Retest

. NA NA NA NA NA NA NA NA NA NA NA NA NA NA

0

. 50 0

. 50 5 ;0 5 .0 0.30 ' 0

. 30 0.98 0. 8 7 0 :50 0.50 0 , 50 0.50 0 : 50 0

. 50 0.50 0

. 50 0.30 0 .3 0 0

. 50 0

. 50 Feb May** May** 2003 2003 2003

NA NA NA NA NA NA 

### 13 0 NA NA NA NA NA NA NA NA 3

.4 NA NA 8.38 8.11 NA NA NA NA 1002 982 

### NA NA NA NA NA NA NA 6 20 NA NA

NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 

### N A NA NA 

### NA NA NA NA NA NA NA NA NA NA • NA NA NA NA •· NA NA NA NA NA NA NA NA NA ' NA NA NA

0.067 0.096 0.096 1.4 2

. 0 !2 .0 0

.080 0

. 15 0.15 1. 0 1.1 1. 0 O

. L4 0

. 36 0.36

. 0

. 18 0 : 30 0 , 30 0

. 16

. 0.14 ' 0.14 0

.078 0.049 0.049 0.1

-1' & 0.1

_ 3 0

. 13 

### 0 3 5 0.20 0

. 20

### ANALYTE GENERAL CHEMIST RY

. Bic

_ arbonatc A lkalinitY Carbonate Alkalinity Ch loride Cyanide Hydroxide Alkalinity Nitrate as N pH 

### Perchlomte Specific Conducw n ce Sulfat e S1llfide Tolll l**Di.~~o vcd**  

### Solids MET ALS A

ntimony Arsenic 

### TABLE2 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-1 (CONT'D) Aug Apr Aug Feb Se p Fe b UNIT 20 03 200 4 2004 20 05 20 05 2 00 6
mJ!/1 N'A 

### NA: 

### N'A 

### NA NA N A 

### mlVI NA 

### NOll. ' 

## NA NA NIX N A mg/1 120 124 120 140 124 109 mg/1 

### Nil>:**N~\o' N~'>~**  )'il'j\ ,, 

### ' Nk · 

### NA mJ!/1 

### NA N'A 

### NA: N:A: NN 

### Nt\ ml!ll 0.26 2.78 2

. 83 2.25 2

.60 2.55 units 8

. 16 8,0 8.2 8.3 8

. 2 7.7 mg/1 

### NA II(A,. 

### Nl\: 

### ' NA NA I..

. NA 

## Iumhos/cm 1028 

### LOOO 1200 880 1200 1000 ms!ll Nl'l 

### Jl5 102 103 105 108 mJ!/

. 1 

### NA NA• 

### NA 

### Ni\ , filA 

### N'A


## .. ml!/l 590 760 616 670 630 628
mJ!/1 NA N:A>t 

### J\l'A: N'"A , 

### N:A , 

### • N 'A ms!ll 

### NA

- 

### !\lA • 

### NJ\., t:l'A**N~ .**  

### NA ·<- A u g 

### Feb Aug 

### 2 00 6 2007 2 007
NA: 

### Ni\ N A 8.00 

## NA 

## NA: J 

### 15 109 105 

# o

: o1 NA Nk NA

. NA N A 

### 2

.60 2.50 2.40 8.6 7.3 7.6 0.002 0, 

### Ill"

### A' < NA 910 1000 1000 116 92.0 104 Q

:Ol**N~** 

### Nl'. 

### 640 630 720


# o:os**-~** 

### NA: N A 0

.05**N~** 

### NA Barium mgll NA ·**N~ \f**  

### N'A**N~** 

### NA NA 

### . 0.03

. NA 

### N A Beryllium m!!/1 

### NA N A\. ·**N~** 

### NA.: ·' NA 

### N:A O.oJ N A: NA "' Cadmium mg/1 

### NA: "- 

### NA· 

## N k NA, ,. N:R 

## N;« 0.0 1**N~** 

## NA Chromium ml!fl 

### NA: NA • N'A 

### NA

. 

### N"A , NA 0 :020**N~** 

### N1\ Cobnlt 

### rnw'l**N~** 

### t\tA '.**N~** 

### NA**~** 

### NA -, Q.O I

- 

### lilA ' I"!

### A Copper mJ!/1 

### NA NA NA 

### N'A. N:<\**N~** 

### o :o t 

### NX NA ·.**~ud** 

### mg/1 

### N A NA ; 

### N1o. Nl\ • 

### NA · I fq:A 

### 0,0':; , 

### N;A; N A Mercury mgfl 

### N ' A.- 

### NA' N!oi Nru

. NA 

### NA**001** : N}l , 

## NA Nicke l 

### ml!il**N~** 

### NA 1; N"11.• 

### Nl\ 

# N'..,. , J N;A; 0.01 NA NA

. 

### Selenium mJ!/ 1

. lilA ,_' 

### N'A**N~** (,' 

## NA**~ /\**  

### o
.os
. NA



### . NZ.. Silver mJ!/1 Nil: 

### NA ,_**N~ NA** **~** 

### NiX '. Nl\ 

### 0.0 1 N,o\; NA Thallium mg/1 

### .N/\ Ni\- 

## NA •' NA**N~ NA** **~** 

### o :os NA 

### NA I Tin ml!fl 

### NA: 

### NA N/li 

### NA' 

### NA:r N A ().3 0 ' 

### NA N A. 

### Vanadium Jllw'l



### . I'M 

### l"l'A 

## NA 

## Nlv NIX · 

### NA· 

## o
.Ol ''' Nw I NA Zl n c 

### mJ!/1 

### NA NA: N
· A 

### Jll').\ NA

. Ni\ •, 

# o :oz9**,-;** 

## N A VOLATILE ORGANICS/PURGEABLE ORGANICS 1 ,2,3-Trichlorobc.nzene ).IJ!/1 

# o :o9g , N:A' l 

### 0.05 ''**()'S** 

### o.o-s i: 

# o
.os tto5 • o:as 1 0

.05.
ACCIO!IC 

### uJ!/1 2:0**1.17~** 11' 

### • 1 %- 7.5

"' 

### 1.'7S**~.5 ·**  

### l.i]5 ; 

## Im**15 --,c** **u; :**  Benzene 

### uw'l 0

. 1
· 5 i 

## o:ds 0.05 • 

### O!Oli o; os**@5 ~**  

### 0.05 li**o:os ~**  

### 0.05 Ch lorofonn ).IJ!/] l.l

.fO fl 

### 0.)) hQ.8 

### 0.8 '**;~( .S**  

### 0 :07 , 

### O.O'Z !_ , 0. 60 Chloromethane uJ!/1 0 .-36 1 

### - 0:<111 .<**~** 

### O r rJ4**:: ~**  

### O:ftil-: 

## o'Tf4 · 0

. 1 4 _<: Q:il4 ' DiciJ i orodill u oromcthnnc u!!ll 0.30 _if 0.09 0.09 o : o9 ''· 

### 0

. 09--! 

### 0.09 0.09 0.09 o·.'o9' Methvler1e Chloride u!!ll**l4** 

### 0.05 0 ! 05 .1! 0:05

. 0.0'5

. 

### Q.OS 

## O.Oii 1 o.os 0.05'< Naohlhnlene ul!fl O

. U49 · 

### NA ·• 

# o.o s •. 0.05 

### 0.05 "' 0

.05 ' 0 .05 1**o~** 

### 0.05 · To luene uJ!/1 0 )10) 

## 0:0'1 0.0.1 ·'**0'7** 

### ' 0.07• 1 

### 0:()'7 ,**Cf07 -~** **om ~**  

# o.tm Trich loronuoromeihonc ul!fl 0.10 ' 0: 07 0.07 ' 

### d.O't 0

.071 

### O : O'lr 0 :07 

### O

.O'l ' 0.01 SEMI·V O LA TILE O RGANICS : None Detecte d HERB ICIDES, PESTICID ES, & 

### PCDs : No n e llctec l ed
NOTES:**~Sample** was not onnlyzed for this parameter during the specified sampling round.
0Indicates that the analyte was not detected above laboratory practical qu::mtitation limit (PQL). Vulue listed is MDL or estimated trace concentralion (BOLDED).

D:\SUi\ThiER\FALL\PICACHO\PlC\lWl.xls\10/2112010 

### F eb 2008 

### N'A: 

## NA 1 1 2 

### NP&. NA 2.46 7.6 

### NA: 1200 107 

### NA 600 

### N1,6,. N'

A !{&, ' 

### NA 

### !)lA

"! 

## N,4i Nl\ NA"' I'{

### I\ 

## NA N

· i\

'>NA**N~ ·**  

### Nl\ " 

## NA NIV NA

o : os b 7li 

### o :os
.. o :o1**l!t** 

### 0.09 

## o : o-s 

# o

: os (f(}7 

# o : rn

### TABLE2 PICACHO SOLID WASTE SITE

HISTORICAL SUMMARY MONITORING WELL P-MW-1 (CONT'D) Aug Jun Sep Feb Aug ANALYTE UNIT 

### 2008 2009 2009 2010 2010 GENERAL CHEMISTRY Bicarbonate Alkalinity mg/1 NA NA NA NA NA Carbonate Alkalinity rrWl NA NA NA NA NA Chloride mg!l 101 130 120 120 120 Cyanide mgll NA NA NA NA NA Hydroxide Alkalinity mgll NA NA NA NA NA Nitrate as N mg/l 2

. 50 2.7 2

. 6 2

. 7 2.5 pH units 7

. 6 8.55 7 .63 7.70 8.30 Perchlorate mgjl NA NA NA NA NA, Specific Conductance J.tmhosfcm 901 1020 97 L 739 1060 Sulfate mgll 99.9 110 120 120 110 Sulfide mg/ 1 NA NA NA NA :' NA Total Dis so lved Solids mg/ 1 600 620 570 640 640 METALS Antimony mg/1 NA NA 

## NA NA NA Arsenic mgll NA NA ., NA NA NA Barium mg/1 NA NA NA 

## NA NA Beryllium mg!l NA ' •C NA NA NA NA Cadmium mgll NA NA NA N A. NA' ' Chromium mgll NA N.A NA ·• NA NA Cobalt mg/1 NA NA NA NA .:. NA Copper rn.g/1 NA NA NA NA NA Lead mg/1 NA '"' NA NA NA 

### NA... Mercury mg/1 NA NA ' NA

**~A** . NA Nickel mgll NA NA NA NA Selenium mg/ 1 NA NA NA NA Silver m<jl NA NA NA NA Thallium mg/1 NA NA NA NA. Tin rng/l NA 

### NA NA NA Vanadium mg/1 NA NA NA NA Zinc mg/1 NA NA NA NA VOLATILE ORGANICS/PURGEABLE ORGANICS 1 ,2 3-Trichlorobenzene

**~gil** 0.05 0

. 37 0.37 0 .1 4 Acetone _j,l._ g/1 1a5 7.4 7.4

. 4 '

. 6 Benzene ug/] 0

.05 0

. 18 O.l8 0.086 Chloroform U.g/1 0.07 

### " 0.48 0.65* 0.61* Chloromethane

**~g/1** 0 ! 14 0.20 0.20 0. 1 11 Dichlorodifluoromethane

**-~gil** 0.09 0 .22 0.21 0.11 Methylene Chloride ugll 0.05 0.27 0.28 0.28 Naphthalene u.g/1 0 , 05 0 .3 0 0,30 ' 0.36 Toluene ug(l 0.07 0

. 12 0

. 12 0 .09 3 Trichlorofluoromethane

**~gil** 0.07 0.22 0.22

**l** SEMI-VOLATILE ORGANICS: None Detected HERBICIDES, PESTICIDES. & PCBs: None Detected
NOTES:

**~Sample** was not ana ly zed For [his parameter during the speci fi etl sam pling round

_ 0Indicates that the ana lyre was not detected above laboratory practical qum 1titution limit (PQL). Value listed is MDL or estimated trace concentra tion (BOLDED). (EgNo calculati o n perfonned. Requires a minimum of three dat a entries.



### * Anulyte also round in blank(s).

D:\SUr-.t\IER\FALL\PICACHO\PICMWI.I(Is\10/2112010 NA · NA Ni\ NA NA 

### '· NA NA
Q.l6 4

. 6 0.083 0.48

**0.14 '·~**  0.099 0.48 0

. 36 1 0

.093 0 !

-

13 MED.

NC NC 116 NC NC 2

. 5 8.12 NC 1000 

### LIO NC 624

NC 0.014 NC NC NC NC NC NC NC NC NC 0

. 008 NC NC NC NC NC

NC NC NC 0.91 NC NC NC NC NC NC STD. AVG. DEV

. MIN. MAX.

NC NC NC NC NC NC NC NC ll5 II 84 140 NC NC NC NC NC NC NC NC 2.27 0.63 0.26 3,5 7 .9 7 0.44 6

.23 8.6 NC NC NC NC 1003 87 739 1200 101 23 48 130 NC NC NC NC 634 l24 432 1200

NC NC NC NC 0.013 0

.001 0.012 0.014 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC 0.008 0 .00 1 0.007 0.008 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC

NC NC NC NC NC NC NC NC NC NC NC NC 0.88 0.22 0.46 1.4 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NCANALYTE UNIT G ENERAL CHEMISTRY Bicarbonate Alkalinity mg/l Carbonate Alkalinity mg/1 Chloride mg/] Cyanide mg/1 Hydroxide Alkalinity ml!/1 Ni t

rate as N mg/1 pH units Perchlorate .mg/ 1 Soecific Conductance ).lmh os lcm S ul fate mg/1 S ulfide mg/1 Total Dissolved Solids mgll METALS 

### TABLE3 PICACHO SOLID WASTE SITE

HISTORICAL SUMMARY MONITORING WELL P-MW-2 Nov Nov Nov Nov Jul 

### 1994 1994 1994 1994 1995

NA NA NA NA NA 

### NA N A NA NA NA

. 140 140 140 14 0 130 NA NA , NA ' NA NA NA NA ,NA NA NA 1.7 1.7 

### 1.6 1.6 2.3 8. 1 8

.2 8

. 0 8.2 8.0 NA NA .NA NA NA NA NA NA NA NA 

### 74 76 74 71 67 NA

**~** NA J:II A NA 630 620 600 61 0 600 Jul 

### 1995
N

A_ NA 130 NA NA 2

. 6 8

. 0 NA NA 

### 68 

## NA 570 Antimony mg/l NA NA NA NA NA ' NA Arsenic mg/l NA NA NA ' NA Barium mg/1 NA 

## NK NA

- NJ\ Beryllium mgl l NA NA NA NA Cadmium mg/1 NA NA NA NA C hromium mg/l NA NA NA -" NA Cobalt mg/1 NA N A 

### NA N A: Copper mg/1 

### NA ,, NA NA NA Lead mgll NA NA NA NA Mercury mg[I NA

**~** 

### NJ\ NA NA Nickel mg/1 NA NA NA NA Sele nium mgll NA NA NA NA Silver mgll NA , 

## NAC NA NA Thal lium mgl l NA ' NA NA NA Ti n mg/1 NA ., · NA NA NA Vanadium mgll NA NA " NA I NA Zinc mg/1 NA NA NA NA VOLATILE ORGANICSIPURGEABLE ORGANICS C hloroform j.J.g/1. ' [ NA NA NA Chloromethane u g{ l ND N A · NA NA " Methy l ene Chloride ug/ 1 

### I NA NA NA Nap hthalene ug/1 

### ND NA NA NA Tolu ene j.J.g/1 I N/\ NA 

### I'!A SEMI- VOLATILE ORGANICS: None Detected HERBICIDES, PESTICIDES , & PCBs: None Detected
NOTES:

**~Samp e**  was not analyz ed for this parometer during the specified sampling round.
0 Indica t es that the analyte was not detected above laboratory practica l quantitation limit (PQL)

. Value listed is MDL or e s timared trace concentration (BOLDED). 

### [EQJ Constituent not detected; MOL not provided.

(a) Suspected Laborntorylfield contaminant.

**O:\SUI\fMER\FALL \PICA**  **O\P C~(1,V2.xls\10/2J/l010**  NA NA NA 

## NA

- NA NA NA NA NA NA

' NA NA

NA NA NA NA NA NA NA NA I NA NA

NA NA NA NA NA NA NA NA NA '\ NA
l NA ND NA 

### I f NA• ND NA J ·, _ NA •· Jul Jul Jul Jul 

### 19 95 1995 1996 1996

N A 

### NA NA NA NA NA NA NA 130 130 145 150 NA NA 0

.03 NA NA NA

. NA NA 2.4 2

. 6 1.89 1.89 8.0 8

. 0 8

. 08 8

.05 NA .1 NA NA NA NA NA 935 923 67 67 65.0 65

. 0 NA NA 0.13 NA 600 590 514 552

NA N A 0. 005 N A NA NA ( l.005 NA NA NA 0

. 1 NA NA NA · tl 0

. 001 NA NA NA 0.003

. NA NA NA 0.0 03 NA NA t'lA 0.003 NA NA NA 0 ,003 NA NA NA 0.005 NA NA NA 0

. 002 NA N A NA 0.003 NA NA NA 0

. 005 NA NA " N A 0 .001 NA NA NA O.Dll NA NA NA 0.042 NA NA NA 0.003 NA NA NA 0

. 01 NA ·
NA NA 0

.2 NA NA NA ND NA_ NA NA 

### ' 0 ,2 NA NA NA ND , NA NA NA 

### 0.4(3) NA

## ANALYTE GENERAL CHEMISTR Y Bicarbonate Alkalinity Carbo nate Alkalinity Chlo ride Cyanide HydroKi tl e Alka l inity Nitrate as N pH Pcrchloouc Specific Con duclllnce Su lfntc Su.lfide To ta l Di sso l ved Sol ids 

### METALS Antimony Arsenic 

### Barium Berylllum 

### Cadmium Chromium Cob !lit Copper Lead Mercury Nickel Selenium Silver Thallium Ti n 

### Vnnnd ium Zinc 

### TABLE3 PICACHO SOLID WASTE SITE

HISTORICAL SUMMARY MONITORING WELL P-MW-2 (CONT 'D) Jul Jul S ept S ept Se pt Se pt Jul 

### UNIT 199 6 1996 1 996 1 9 9 6 1996 1 9 9 6 1997 mg/1 NA**N~** 

### N"A 

## NA Ni/o; NI'C NA ' m1o:ll .NA 

### NY\: NA**N~** NA 

### NA: · }!A) '· 

### m!!/1 148 147 140 140 1 40 140 138 

### mWI 

## NA Nk**N~** 

### NA 

### !ii M · NA**NA ~**  mg/1 

### NA: NA NA 

### NA• 

### N'A: 

## NA NA ml!fl. 2

.07 2.20 2

. 19 2

.4 2. 1 2 2.33 1.9 unirs 8.06 

### 8.08 7.7 7.73 7

.7 7.75 7.48 ml!/1 NA 

### NA >·' NA ' 

### NA , N"' : 

## NA NA J.Lrnhos/cm 947 92 3 

### NAl 

## Nh'**1\1~ !**  

## N A

I ' NA mg/ 1 71.0 65

.0 61.1 61.1 63

.6 66.2 41.8 ml!/ 1 

## NA N' A**N~**

### Nil~ 

### NA"< 

### Nl<· NA mWI 560 

### 564 520 514 520 

### 506 540 mg/ 1 N:t\ • 

### NA: NA'**~.** 

### NAi 

## N .A**N~** 

### NA: mg/ 1 

## N/,\ !)fA 

### NA ' 

## N A**~A** 

### NA •.**N~** 

### •. mg/1 

## N A flti\.;·**N~ '**  

### N'A: N1i .t •i:l**N~** N" A ., 

### mWI 

### NA NA ' • NA; 

### NA Ni\lf. 

### NA o 

### NA mg/1 

## NA

. Nl\>:**N~** 

## NA:**NA ~**  

### " N)\ , 

### NA: mg/ 1 

### Nl\ 

## N A: NA: j N'A 

### N;ll N&_ 

### N.A mw'l 

### NA 

### NA:**NA ~**  

### NA 

### N A .•
.. 

### N 'A'**N~** mw'J**~ N~**  

### NA • 

### , NA Nll:**~** 

### NA mg/1**N~** 

### N
· A \. 

### Nl\ 

## NA:**N~ ~**  

### Nl\: NA 

# ''·· rng/1**'~** 

### N A

. NN • 

### , NI\: N l\ NA "' 

## !'if A mg/ 1 

### I N'A 1111\ c' 

## NN NA 

### NN

. Ni-l NA mn/ 1**Ill~** 

### . N

'A 

### N:A: 

### N A li5i 

### NN • NA' NJ!i mgft 

### NA 

## N A.i> " NN NP.

. NA • 

### N.t\ 

### • NA mg/1 

### NA 

### NA**'·r'. NA** **~** ,t:'**N~ ,.**  

### N'A •**N~ •-**  

### " NA '> · mg/ 1 NA 

### NA**~** 

### N1\ NA NA \- )IIi,\; NA mg/1 

### N : A', 

## Niv**N~** 

### JiiJ\ , NA- 

## IN'A"' 

## lilA· mw'l !)1;11 NJII**NA ~»,**  

### NA.**NA ~**  

### NA: 

### N A. VO LATILE ORGANICS/PURGEABLE ORGANICS Ch l oroform 

### ll WI**~V'L N~**  

### O

. 'l (a) 

## NA N\4**Jlr~ <**  

# o a:. Ch l oromethane 

### 1-llVI NA · 

### NA •' 

### ND**~** lj/1\ 

### NA + 

### · NP: Jul Jul Ju l 1997 1997 1997**~** NA NA**N~ ~**  NA NA 

### 138 

### 140 140 

### NA' 

### NA I\IA**~** 

## N A:'..**.** 2

. 1 2.1 2.1 7.44 7.43 7.47 

### NA NA NA ·**N~ .**  

## NA: NA , 41

. 2 43.1 39.8 

### !'II A 

### NA NA 540 556 538
N:A'c N A NA 

### !II

## A · NA: NA ;, 

## NA 

# . NA' 

### f'IJ'\1". NA < 

### Nftl NA 1· 

### Nl\

lt 

### NA**NA ~**  

### l':f:.\**~** 

### N A NA

;**N~ ·**  

### Nf\· NA> N :tl: ,. 

### NN '**,. N~**  'L**N~** 

### N

!M' N",61o v NA. • 

### NA NA', 

### 'Na 

### NIV ,, NA NA 

### NA <> 

### NA.i NJI\ N:A 

## NA

. ..!)< 

### NA

.. N<ll N A'**~A** 

### NA Y NA' ,., 

### NA NA

\. 

### N A

.. 

### NA NA1 N:.\: NA,·

### fit~ 

## NA I NA Methy l ene Chloride u.!l/1 Nt>; 

### !ItA .,;: 0

.2!**!)!~ ·**  

### . NA f. 

### ' NA >.**~** 

### o; v 1 

### NA " NA 

### NA· Naphthalene un/1 

### NP. 

### NA ND '· 

### N'f'\ Toluene J.lg/1 N'A I 

### MAl • ' 0:3 " 

### NA! S EMI-VOLATILE ORGANICS: None Detected HE RBl C ID ES P EST I CIDES, & P C R s : None Detected
NOTES: [lli)sample was not analyzed for this parameter during the specified sampling round

. 

## D Indicates that the analyte was not detected above laboratory practical quantitation limit (PQL)

. Value listed is MDL or estimated trace concentration (BOLDED). 

### [BQJ Constituent not detected; MDL not provided

.

(a) Suspected laboratory/field contaminant. 

### * Analyte also found in blank(s).**N~ ~** **N~ -.**  

### Na 1 Nt\. , N;6; 

### NA';. 

### NA'I. N A

'- li**,Jll ~**  

## NA · " NA: NA

### ANALYTE G ENERAL CHEMISTRY Dicarbonmc Alkalinity Carbonate Alkalinity Ch

loride Cvanide Hydroxide Alkalinity Nitrate usN pH Pcrclllornte Succi fie Conducronce Sulfate Sulfide Total Dissolved Solids METALS Antimony Ars eni c 

### TABLE3 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-2 (CONT'D ) Sept Sep t Sept Sept Mar A u g 

### UNIT 

### 1997 1997 1997 1997 1998 1998 mjl/1 NA NA 

### NA NA NA NA mwl NA ' lilA NA N:A NA

**~A** 

### mgll 138 138 138 137 137 140 mull 

## NA lilA NA " , 

### NIX NA NA mJt/ 1 NA

. NA NA• NA "'" NA NA mjl/1 

### 1.03 1.04 

### 1.19 1.1.3 2

.5 2.7 

### units 7.94 7

. 96 7.94 7.95 7.86 8.16 mn:/1 NA"' NA• 

### NA. NA , NA NA I lllJTlhos/ cm 

## NA NA lilA 

### N'A f.l)l. ," J:\11\' m.WI 43 

### 4 1 41 43 

### 60 N' A mg/1 

### NA

**N~** 

### NJ\ 

### NA NA • 

### NA mg!l 5 16 510 536 

### 536 540 

### 546
mJI/1 NA 

## NA. NAI 

## m NA N:A.: 

### me/1 

### NA ' NA 

## NA NA• 

## N:A

**~A** 

### Mar Aug Feb 

### 1999 1999 2000
NA NA NA NA N.A\ 

### Ni\ 133 123 123 NA NA·o:, NA NA N.V NA 1.79 2

.22 2

. 72 

### 7.8J 

### 7

. 85 8

. 21 

### NA Nfti 

### NA 962 9 1 9 9 18 NA '1 NA ' NA NA 

## NA Ni\ 539 528 

### 527

N" NA NA NA NA

**N~** 

### Barium mg/1 

### t'rk- 

# NA NA < NA: NA 

### l'lA:

. ' NA NA 

### NA Beryllium mg!l 

### NA N:A NA NA Cadmium mJI/1 NA I

**N~** 

### NM N'A! 

### Chromium mWt NA ' NA 

### NA N N Cobalt mg/1 

### ?'IN 

## NA N'A "

**NA ~**  

### Copper mg!l NA NA NA · NA Lead mg!l

**!\lA ~**  

### NA. NA 

### Nl\

- Mercury mW! NA

. 

### 1 N Al Nk ; 

### NA Nickel mJ!/1 Nl\ :, 

### NA N:A I 

### NA Selenium mg/1 !'lA • 

## NA NA 

## NN Silver mg/1 N'A NA N1\ , ' NA Thallium 

### m!VI NN •

**N~** 

### NA , 

### NA · 'fin mcifl NA NA N1\ • NA · Vanadium mg/1 

### NA 

## NA N'A 

## N N Zinc mg/1 NA 

### NA Nl\' NA VOLATILE ORGANlCSIPURGEABLE ORGANICS Chloroform UW! 

### O '.il NA Nh 

## NA Chloromethnne U.l!ll 

### Ne 

### Nl\ NA, 

## NA Methy l ene Chloride

**~~WI** 

### 0 ;2 > 

## NA NA 

### Nil: Naphthulene 

### I-WI N:D

. NA NA• 

### N AI Toluene J.l.g/1 

### 0.3:1 ' N'A: 

### l'ii\ '- Nl<\ • 

### SEMI-VOLATILE ORGANICS: None Detected HERBICIDES, PF.sTlCIDES, & 

### PCB s: None Detected
NOTES:

**~Sample** was not analyzed f o r this parameter during the specified sampling round.
Otndicates that the analyte was not detected above laboratory prnctic:el quanti ration limit (PQL). Value listed is MDL or estimated trace concentration (BOLDED). 

### [EQJ Constituent not detected; MDL not provided.

(a) Suspected laboratory/field contaminant. * Analyte also found in blank( s)

.

D:\SUM}fER\FALL\PICACHO\PICMW2.xls\J0/2J/2010 

### Nl<\ NA NA

. 

### NA NA, 

### NA
· JilA.' NA 

### NA

**NA ~**  

### NA

. NA NA NA NA NA 

### NN NA NA NA 

### Nt\. NA• ' 

### NA

. NA NA NA NA NA NA 

### NP.L NA

**~·** 

### 1\I'A I NA

**NA ~**  

### NA: · NA ' 

### NIX NA NA • NA NA< NJ\1 ' NA NA NA 

### NA•' NA: NA

- NA NA

..

, NA·

**N~** 

### NA 

### NA 

### NA

NA NA NA NA

**N~** 

### NA NA NA N'A 

## NA NA N1\. · NA NA NA
0.06 

### o : 06 o ;n 

### 0 .06 '• 

### 0.06 ' NID'' Nl) 

### O i J38(a) 0.1

. 4\. 0.14

**~** 

### o ·.os

**21 ~**  

### 0 .3 5

**03 ~**  

### o :o3 1 NO 

### Nli>' 

### ND 

### Oll

**.~ O.Z4'l**  

### 0.07 0!07

. 0.05 0.07. '' 

### 0 :0:7•

### TABLE3 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-2 (CONT'D) Aug 

### Feb A ug 

### Feb Aug Aug ANALi'TE UNIT 

### 2000 2001 2001 2002 2002 2002 GENERAL CHEMISTRY Bicarbonate Alkalinity ml!.ll NA: 156 NA NA NA NA Carbonate Alkalinity m!VI NA , 20.0 NA NA 

## NA NA ' Chloride mg/1 123 149 130 140 140 140

**C~anide** 

### mg/1

**N~ 0.0100**  **~** 

### Nl\ • NA NA

**N~** 

### Hydroxide AlkalinitY mg/1 N'A 

### 20.0 NA NA NA NA, I' 

### Nitrnte nsN mJ:{I 2.68 2.70 2.6 2.6 

### 4

. 2 3

. 2 pH 

### units 7.86 7

. 98 8.04 7.94 8.01 

### NA

**P~r ch**  **lornt e**  

### mg/l 

## NA

. NA 

### Ni'\ 

### NA: NA

**~** 

### J':olfl , Specific Conductance IJ!mhos/cm 91.4 912 902 884 874 

## NA Sulfate m
. l!! l 

### lAA 

# t oo : NA 

## NA NA·

**N~** 

### Sulfid(} mg/ 1 N
· A

'• 0 .5 00 N1\:

. NA: 

### NA: NA· Total Dissolved Solids mg/1 524 568 

### 600 560 6{i0 530 METALS Antimony mR/1 NA 0

.060 NA NA 

## NA N/\ Arsenic rnlt'l NA 

# o.roo NA NA NlV NN Barium mg/1 NA 0.0120 NA• 

### NA 

### NA' <>. !:ifA I, Beryllium mg/1 NA· 0 .001 NA: NA NA NA Cadmium mg/ 1 NA i 0.010 

### NA 

### NA NJ\

**)I(~** r. 

### Chromium mR/1 NA



### ..

**~** 

### 0

.0269 NA Y NA NA NA Cobalt mg/1 

### fi
· A: 0 :007 NA 

### Ni\ 

### NJ\ NA Copper mg/1 

# NA O.olO NA NIX 

### Nl\ NA Lead 

### mg/1 NA 0.07'5 N:Al N,bl 

# NA NA: Mercury mgll NA 

# o : oooz

**~** 

### N'A Nl\ 

## NA Nickel mg/1 N'A 0 .0 30 !)lA 

## NA 

## NA NA

**S~lenium** 

### mg/1 NA o,Hro NA 

## NA NA

**NA ~**  

### Silver mg/1 NA' 

# o : oo1 NA Ni\ 

### NA 

### NA Thallium 

### mg/1 

### NA 0.100 

## NA N;A..

**NA ~** 

**NA ~**  

### Tin mw't 

## NA 0 ¥25 0 NA NA NA NA 

### Vunadium 

### •WI 

### N'Pi 0.0114 

### NA NA NA NA' Zinc mg/ 1 NA 0.020 NA NA

**~A** 

### N A': VOl,ATlLE ORGANICSIPURGEABU;; ORGANICS Chloroform ltg/1

**O.O'l ~**  

# om o : o1

**0~0 1**  

### 0.5 0

**'151~** 

### Chlorome tlmn e ug!) 

### 0.1 43 

### O l l4

**l~** 

# o..so ; 0.5Q N/!1. Met11ylcnc Chloride ugl]

**0.06 ~**  

# o : o6 0.06 ,•
. o
.so o: so NA Nn phlhal ene J.Lg/1 

### O.lO ' 011

. 0 0.

- 10

,

**5o .**  

### 0.5

. 0 NA 

### To luen e )lg/1 

### o :o1 · 

### O.D7 0 :07 ": o
.aoi 0:10 

### N:N SEMI-VOLA TILE ORGANICS: None Detected HE RB ICIDES PESTICIDES

. • & 

### PCBs: None Detected Nm'llS :

**~Sample** wa s not ann:l yz ed f or this parameter during the specified s ampling ro und 4
0Indicate s that the analyte wa s not detected above laboratory practical quantita ti o n limit (PQL) , Value li s ted is MDL or e s timated truce concentration (BOLOED)

.

D:\SUMMER\FAL.L\PICACHO\PICMW.Z.xls\J0/21/2010 

### Feb Fe b Aug 2003 2003 2003
NA: NA NA: NA 

### !:if A

. NA 140 160 160 NA 

### N:A NA NA 

## NA N N 2

. 7 2.5 2.6 

### 8.25 

### NA 7

. 98 NA: NA Nil> 892 NA 9 18 NA NA

. NN N

A: NA 

## N!6i. ·

600 

### 540 510


### NA' NA NA NA NA i N/\< N.bi NA NA NA 

### NA

**N~** 

### Nf\ filA \ 

## NA NA NA N"" ' N
·

A: 

### riiA: '· 

## NAi NA Nl\

**N~** 

## NA NA. NA

.. N.Al 

### NA NJ\ NA NA NA NA 

### NA NA NA 

### Nl\ 

### N'A N'A ' 

### NA '''

**N~**

**N~** 

### NA NA NA

**N~** 

### !II A 

### N/\ 

## Nk NA


### 1.4 NA 0

. [.9 

# o

.r4- NA • o: 36, 0. 1

6 NA O : l!l 

### O.o78 NA 0;049 1 

### 0.1 • 1. 

### NA- 

### 0.
·13'

### TABLE3 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-2 (CONT'D) Aug Apr Aug Feb Sep Feb ANALYTE UNIT 2003 2004 2004 2005 2005 2006 GENERAL CHEMISTRY Bi carbonate Alkalinity mg/1 NA NA 

## NN ·•J NA NA NA Carbonate AlknliJli ty mJ!ll NA JIIA 

# NA JIIA 

## NA NP: Ch loride niiVI 140 

### 136 131 132 L46 133 Cyan j dc mgll 

### NA NA

**I' ~A**  **-'"** 

### NA NA· NA Hydroxide Alka linity mg!l NA NA Nil\: 

### NA NA NA Nitrate ru; 

### N rniVI 2

. 5 2

. 62 2.75 2..1.5 2.55 2.55 pH 

### units Ni\o 8.0 7

. 8 8.1 7

. 5 7

. 8 Perchlorure mwl 

### NA NA ·, NA NA 

### I"/A 

### NA Specific Couducwnce

**~Lmhos/cm** 

### NA: 

### 1000 1100 820 990 1100 Sulfate mg/1 

### NA 

### 64

. 5 61.0 62..0 59.3 6l.O Sulfide mg/1 

### NA NA NA: NA NA NA Total Dissolved Solids mJ!ll 530 665 584 590 590 

### 600 METALS Antimony mg/1 NA NA NA NA 

### NK • NA Arsenic mgll 

### NA NA N1\ NA 

## NA' NA llnrium ml!ll NA_,,, N-N NA l 

### NA

**~,** 

### Nk · NA Beryllium mgll 

### NA NA

. 

## NA '

**~** 

### NA'. NA , 

### C-ndmium mgll 

## NA NA

**~A** 

### NA 

### ' Nil\ 

### NA' Chromium mg/1 NA NA NA NA NA I NA Coba lt m!l/1 NA

**NA ~**  

### N'A NA NA NA Conner miVI 

## NA

**N~** 

### ' NA NA NA NA Lend mg/1 

### NA

. N1\ 

### Nt\ NA NA ¥ NA Mercury 

### mgll 

## Nk NA' ' NA 

### NA 

### N'A

. N'A 

### Nickel mg/1 NA N1\'" NA 

### NA NA. < NA Selenium m!:ll NA' Nl\ NA NA NA'. NA Silver 

### mJ!./1 NA NA N/\ NA
· ' NA NA Thnlliwn mg/1 NA 

### N'A · NA NA I 

### NA l'itA ::O Tin mg/1 

### NA 

## NA NA NA NA NA Vnnndium 

### mgll Nl\ NA 

## NA NA· NA NA1 Zinc 

### mwl !':fA NA NA NA

**NA ~**  

### N:A. VOLATILE ORGANlCS/PURGEABLE ORGANICS Ch l oroform IJ.j!}l 

### NA. · 

### 0.07 0.01 0.01 o: 67· 0.07

**Ch lomm**  **th tm~**  **~tgll** 

# NA O.L4 O rL4

. 0

. 14 

### O i l'! O tl4 

### Meth)'ICnc Chloride !lg/1 

## NA 0.05

. 0.05 , 0

.05

- 0 :05 o: o5 Naphthalene Ill! II 

### NA NA

**o5 ~**  

### o
. os O

.Q5 I 

### 0.05 Toluc.ne

**~~gil** 

### NA 0 !07 

# om " 

# o : o1 0 .( )7 :' o :o1 SEMI-VOLATILE OltGANICS: None Detected HERBICIDES, PESTlClDES, & 

### PCBs: None Detecied
NOTES:

**~Sampl e**  was not analyzed for this parameter during the specified s ampling round.
0Indicates that the analyte was not detec ted above laboratory practical quantitation limlt (PQL)

. Vnlue listed is MDL or estimated trace concentration (BOLDED)

.

D:\SUI\fi\.IF.R\FALL\PICACHO\PICi\IW2.ds\L0/2l/ZOIO 

### Aug Feb 

### Aug Feb 2006 2007 2007 2008
NA• NA NA NA 8.00 NA NP.

**N~** 

### 133 130 122 130 0

.01 NA NA · NA NA NA NA NA 2.43 

### 2

.40 2

. 35 2

. 33 8.4 8

.2 7

. 5 7

. 9 0.0020 NP. NA NA 850 740 

### 900 1000 63.0 52

. 3 

### 5(>.6 57

.7 0.01 NA NA NA 600 

### 608 630 604
0.05 NA NA NA 0.05 • NA NA

**~:** 

### Nl\ 0.03 NA

**N~ ·**  

### N"A ' 0.01 Nk 

## NA NA 0.01 

### NA NA NA



### O.QIO NA NA NA 

### O.QI NA 

## NA N"'

0.021 

## NA NA 

### NA o :os · NA NA'. 

### NAI 0.001 NA 

### NA

. NA' O.QJ N/\ 

### NA• NA 0

.05 " NA 

## NA 

## NA O:ol 

### NL\ 

# N "' NA 0.05 NA N.A 

### Nl\ 0

.3

.

0 NA Nl>i NA• (l:03

**N~** 

### NA If, 

## N'tl: ·

O.Q28 

### NA NA NA •· 

# om om 0.07 0.07 Q.\[ if) 

### 0.14

. Q,)4 

### 0

. 14 o.o5_; 0

.05 o: o5 o: os 0.05< o :o5 0.05 ' 0

.05 

### OlYl Q:o7 1 

## O.o? 01 07 ·

### TABLE3 PICACHO SOLID WASTE SITE

HISTORICAL SUMMARY MONITORING WELL P-MW-2 (CONT'D) Aug Jun Sep F eb ANALYTE UNIT 

### 2008 2009 2009 2010 GENERAL CHEMISTRY B icarb o n a t e Al kalin ity mg/1 N A NA N A NA Carbonat e Alka linity 111Jdl NA NA NA NA Chloride mg/1 122 140 13 0 140 Cyanide mg/1 NA NA NA. NA H

y droxide Al kalinity mg/ 1 NA NA NA NA Nitrate a s N mw l 2.5 5 2

. 9 2

. 6 2.7 pH un its 7

. 3 8

. 00 8.0 0 7

. 5 9 Perchlorate mg/1 NA :, NA NA N A Specific Conductance 

## l !!mhos/em 9 80 929 10 10 998 S ulfate mg /1 55

. 2 66 61 6 5 Sulfide m g/ 1 NA NA NA ' NA Total Di ss olved So l ids mgf] 5 60 5 3 0 530 590 METALS Antimo ny mg/1 NA NA NA NA Ar senic mg/1 Ni\._ ,. NA N A NA Barium mg/1 NA NA NA NA '· Beryllium mg/1 NA NA NA NA C admi um m g/ 1 

### NA NA

**N~** NA Chromium mg/1 NA 

## NA NA N A Cobalt mgf] NA NA NA NA Copper mgll NA NA NA NA Le ad mg/1 NA NA NA NA M ercury mg/1 NA NA NA NA Nickel mg/1 NA NA NA NA Sel e nium mg/ 1 NA NA NA NA Silver mgll NA NA NA N A._ T ha lliu m mg/1 NA NA N A NA Tin mg/1 NA NA NA NA V an adium mg/1 NA NA NA NA Zi n c mgll NA NA NA NA VO LA TILE ORGANICS/PURGEABLE ORGANICS Chlo rof orm ).! gil 0

. 07 0

.23 0 , 23 0

.072. C h lorometh ane ug/1 0 .1 4 '· 0 :20 0.20 0.11 Methylen e Chloride u w l 0

.05 0.27 0

. 28 0.28 N aphtha le ne uw l 0

.05 ! 0.30 0

. 30 0

. 36 Tolu ene !!gil Q.Q7, 0.12 

### O t ll;l ' r 0

.093 " S EMI-VOLATILE ORGANICS: None Detected HERBICIDES , P E STICIDES & PCBs: None Detected
NOTES:

**Samp e**  was no t analyzed for thi s p ara me t e r duri ng the spec ifi ed sa mpling ro und.
0I n dicates that th e ana lyte was not detec t ed above laboratory prac tical quantitation li mit (PQL)

. V alu e listed is MDL or es timnted trac e c o nc e ntratio n (BOLDED)

. [@No calculation pe rformed. Requires a minimum of three data e ntrie s.

O:\SUMMER\F,\ L L \P IC ACHO\PICMW2.xls\L0/1. 1/1.0 10 Aug 

### 2010 ME D.

NA NC 

### Nl\. NC 140 14 0 NA NC NA NC 2.5 2.4 0 7

.49 7 .9 7 NA NC 954 923 5 6 61.1 NA NC 580 560

NA NC NA NC NA NC NA NC NA N C NA 0

. 010 NA NC 

## NA NC NA NC NA NC NA NC NA NC NA NC NA NC NA NC N A NC NA NC

0

. 12 NC 0 .14 NC 0.48 NC 0.36 NC 0.093 NC STD. AVG. DEY

. MIN. MAX.

NC NC NC NC NC NC NC NC 137 8 122 160 NC NC NC NC NC NC NC NC 230 0.55 1. 03 4

. 2 7

. 9 0.25 7

. 3 8.4 NC NC NC NC 936 75 740 1100 59 .4 10.4 39.8 76 NC NC NC NC 56 4 4 0 506 665

NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC 0

.013 0

.01 2 0

.003 0 .0269 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC

NC NC NC NC NC NC NC NC N C NC NC NC NC NC NC NC N C NC NC NCANALYTE GENERAL CHEMISTRY Chloride Cyanide Nitrate as N pH Specific Conductance Sulfate Sulfide Total Dissolved Solids METALS Antimony Arsertic Barium Bervllium UNIT mg/l mg/l mg/l units 

### TABLE4 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-DW-3A Nov Nov Jul Jul 1994 1994 · 1995 1995

89 90 90 90 NA NA NA NA 1.7 1.7 2.3 2.2 8.2 8

. 1 8

.2 8.2 umhos/cm NA NA NA NA

o:udl 100 

### tOO 98 98 mgfl NA NA NA NA mg/l 670 700 570 680 mg/l NA NA NA NA 

### m.!dl NA NA NA NA__ mg/1 NA 

# • NA :' NA NA rng/1 NA NA NA NA J-' Jul 1996

99.0 0,03 1.89 8

. 22 911 97

. 0 0

. 05 524

0.005 0

. 005 ' ol 0.1 0, 001 ' Cadmium rng/l NA NA**~** NA NA

. 0.003 Chromium mgfl NA NA

. NA NA Cobalt mg/1 NA NA**~** NA**-~** NA Copper mg/1 NA NA NA · NA Lead mgfl NA NA NA NA Mercury mg/l NA NA NA NA Nickel mg/J NA NA NA NA

.. Selenium mg/1 NA NA NA NA Silver mg/1 NA NA NA NA Thallium mg/1 NA NA NA NA Tin mg/l NA NA 

## NA NA Vanadium mg/l NA NA NA NA Zinc mg/l NA NA NA NA VOLATILE ORGANICS/PURGEABLE ORGANICS 4-Methyl-2-Pentanone**~g/1** NA NA NA NA Chloroform**~g/1** NA NA NA NA Chloromethane ugfl NA NA NA NA Toluene !lg/l NA NA NA NA SEMI-VOLATILE ORGANICS: None Detected HERBICIDES, PESTICIDES AND PCBs: None Detected
NOTES:**~Sample** wus not analyzed for this parameter during the specified sampling round.
0Indicates that the analyte was not detected above laboratory practical quantitation limit (PQL) , Value listed is MDL or estimated trace concentration (BOLDED). 

### [B:QJ Constituent not detected; MDL not provided

.

(a) Suspected laboratory/field contaminant

. 0.006 0.003 0.003 0.005 0.002 0.003

. 0.005 0

. 001 0.005 0

. 045 0.003 0.01


### ND 

## o : 2

· ND 0.4(a) Jul Sept Sept 1996 1996 1996

100 97.5 97.5 NA NA NA 1.81 2.12 1.97 8

. 1 8 7

. 9 7

. 82 892 NA NA 97

. 0 91.9 90

. 9 NA NA NA 518 44 0 448

NA NA NA NA 

## NA NA NA NA ,, NA NA NA NA NA NA , NA NA NA NA NA NA NA NA NA. NA NA '" NA NA NA NA NA NA NA NA

. NA NA<: NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA

NA ND NA NA 0.4(a) NA NA ND NA NA 0

. 3 NA

### TABLE4 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-DW-3A (CONT'D) Jul 

### Jul Jul Jul 

### Sept ANALYTE UNlT 

### 1997 1997 1997 1997 1997 GENERAL 

### CHEMISTRY Chloride mg/1 93 95 95 

### 98 98 Cyruiide mg/1 

### N..-;**N~ ,,**  

### NA · NA NA Nitrate asN mg/ 1 

### 1.96 

### (..85 1.83 l-72 

### 1.65 

### PH unit $ 

### 7.57 7

.6 7.6l 7

. 59 8.05 Specific Conductance l l .lln

ho s/c m 

### NA 

## NA NA NA\ : N:A. 

### Sulfan: mg/1 

### 69

. 5 67.5 66.2 62

. 9 58 Sulfide ml!ll 

### NA: N:.\ " 

### NA 

### Nil. ·' NA Torill Di sso lved Solllls mg/1 546 

### 542 560 

### 564 540 

### METALS Antimony mgfl 

### NA NA: ol NA 

### NA

- , Ni\ 

### Arsenic mg/1 NA: 

### N.l\ ·.· Nfll 

### NA Y N,.&; Barium mg!l N"'A:**N~** 

### NA 

## NA "

. N"A " 

### B

eryllium mg/1 

## NA Nf>, NA: 

## NW Cadmium 

### ml!fl N"A NA• 

### NA \ 

### NN r Chromium mg/ 1 

### NA NA • · 

### l'IA 

### NA' Cobnll mg/1 NA**N~ ·:**  

### ' NP\. NA i I! 

### Cop})(;r mg/ 1 

### Nf'l Ni\ !) NA: 

### NA: Lead 

### ml!fl 

### NA 7r N"t>l**N~ ~~.**  

### N'(\ ;1 Mercury mpjl NA " <i NP,. 

### NA 

### NA > Nick el mg/1 

### N:<\: 

### N.l\ Ni\:**N~** 

### Selenittm mg/1 

### NN 

### N:A I" 

### NIX NA 

### Silver mg/1 N A'-

. 

### NA NA 

### NA: Thallium ml!/1 

### N:A 

### NA>

- N k · Ni:\ \; Tin mg/l**N~** 

### NW :o N 1 

### A**N1\ ~**  

### Vanndium

. mg/l 

### N.( lilA. 

### NA: NA ' 

### Zinc mg/1**N~** 

### N Ab. NA I 

## Nl\:_.. VOLATILE ORGANICS/PURGEABLE ORGANICS 

### 4-Methyi-2-Penlltnone J.t

. g/ 1 

### ND**N' ~**  N/1: 

### .•. 

# , NA: Chloroform 

### ul!ll**~ 1\l~**  

### NA**~** 

### Chloromerhnne 

### J.LWI ND r;li\ 

### Nil( 

## ,. NA Toluen e 

### uWI <r.<3 , NX\ NA ,. '**N~ SEMl-Vor** **ATLL E**  

### ORGANICS: None Detected 

### HERB I CIDES PESTICIDES AND 

### PCBs: None Deteelcd NOTES:**~Sample** was not analyzed for this paramete r during the specified sampling round.
0Indicates that the analyte wns not detected above laboratory practical quantitation limit (PQL) , Value listed is MDL or estimated trace concentration (BOLDED). 

### [BQJ Constituent not detected; MDL not provided.

D:\SUI\fMER\FALL\PJCACHO\PICDW3A

. :ds\10/21/lOIO 

## NA Nl!. N/\ NA**N~** 

### Ni\**N~ ~** 



### · IN'A



### NA: NA N"it 

### N'e. 

## NA**~** NEl 

### O i 2

. ND 0.-3 

### Sept Sept Se r>t 19.97 1991 

### 1997


### 96 98 

### 96 NA NA 

## NA 1.46 1.76 1.99 8.05 8. 04 8. 03 

### N

' A NA 

## NA 62 

### 66 60 NA•· 

### NA 

### NA 528 528 522
NA NA < NA ·'· 

## lilA NA il**NA ~**  

### NA NA 

## NA: NA 

### N/.\< 

### NA NA NA I 

### Nl!. ·**N~** 

### NA\**N~ ,**  

### NA. c NN Nil.• 

### NA NA 

### NA.. 

### NA 

## NA:- 1:'-11\.r. 

## Nil\ NA NA 

### Nl\ , 

# NA NA NA

v NA. 

### NA NA NA 

### tqA



### Nic\ N:A 

### N:A N'A NA-· 

## NA N

k • 

## NR**N~** 

### NA N1\ \ NA



### NA 

## N'A Nt.\ 

### lilA·. ·**N~** 

### N:A l':{:N 

### NA ' N;Ai Nl\ 

### NA :-• 

## N.A

### TABLE4 PICACHO SOLID WASTE SITE

HISTORICAL SUMMARY MONITORING WELL P-DW-3A ( CONT'D ) -PIEZOMETER AFTER MARCH 1999 Mar Aug Mar ANALYTE UNIT 1998 1998 1999 MED. GENERAL CHEMISTRY C hl ori de m g/ 1 91 97 90.4 96 C y anide m g/1 NA NA NA NC Nitrate as N

**m~:/ 1**  2

.2 2

. 3 1. 55 1.87 pH units 7

. 98 8. 2 6 8. 0 5 8. 05 S pecific Conductance

**~mhos/em** NA NA 932 NC Sulfate mgfl 86 NA NA 86 Sulfide mg/l NA NA NA NC T otal Dissolved Solids mg/ 1 533 533 530 53 6 .5 METALS A ntimony mg/1 NA NA NA NC Arsenic mg/l NA NA 

## N A NC Barium mg/l NA NA NA NC Bery llium mg/1 NA N A 

## N A NC Cadmium mg/1 NA NA 

## NA NC Chrom ium mg/ 1 NA NA NA NC Cobalt m g/ 1 NA NA NA NC Copper mp;/1 NA NA NA NC Lead m j!;/ 1 NA NA N A NC Mercury mg/1 NA NA NA NC Nicke l m g/1 NA 

# ,, NA NA NC Se lenium m g/1 NA NA NA N C Si lver mg/1 NA NA NA N C Thallium mg/1 NA NA li NA NC T in mg/ 1 NA NA NA N C Van adium mg/1 NA NA NA N C Zi nc midi NA NA NA •I NC VOLATILE ORGANICS/PURGEABLE ORGANICS 4-Methyl-2-Pentanone 

### IJ.Jdl 

### ND ND 0.413 NC Chloroform ).Lg/1 0.06 0

. 06 0

. 17 NC Chloromethane

**~g/1** ND ND 0.118(a NC Toluene Ug/l 

# o m 0.07 0

. 05 NC SEMI-VOLATILE ORGANICS: None Detected HERBICIDES PESTICIDES AND PCBs: None Detected
N O TES:

**Sample** was not analy zed for th is parameter d urin g the specified sampling round.

Orndicates that the an a lyl e w a s not detected abov e laboratory practical quantitilt ion limit (PQL). Value listed is MDL or e s timated trace conce ntration (BOLDED). [E£} No calcu lation p e rf o nn ed

. Requires a minimum of three data entries

. 

### [EQJ Constituent not d et e cted ; MDL not provided

. (a) Suspected labor ato ryllicld c ontarrUnanl. STD. AVG. DEV. MIN.

95 4 89 NC NC NC 1.9 1 0 .2 1.5 7

.98 0

.24 7.57 NC NC NC 81 17 58 NC NC NC 55 3 69 440

NC NC NC NC NC NC NC NC N C NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC

NC NC NC NC NC NC NC NC NC NC NC NC MAX.

100 NC 2.3 8.26 NC 100 NC 70 0

NC NC NC NC NC NC NC NC NC NC NC NC N C NC N C NC NC

NC N C NC NCANALYT E UNIT GENERAL CHEMISTRY Bicarbonate Alkalinity rng/1 Carbo nate Alkalinity mgfl Chloride mg:fl Cvanide mg:fl Hydroxide Alkalinity mg/1 Nitrate as N mg/[ pH units Perchlorate mg:fl Specific Conductance lumhos/cm Sulfate mj!/ 1 Sulfide mg/ 1 Total Dissolved Solids mg/1 METALS Antimony mg/1 Arsenic mgll. Barium mg/1 Beryllium mg:/1 Cadmium mg/1 Chromium .mg/1 Cobalt mg/1 Copper rng{l Lead mg/1 Mercury mg/1 Nickel mg/1 Selenium mg/1 Silver mg/1 Thallium mg/1 Tin mg/l Vanadium. mg/ 1 Zi nc mg/1 

### TABLE 5 PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-4 Nov Nov No v Nov Jul 1994 1994 1994 1994 1995
NA

. NA NA NA NA NA NA NA NA NA 1 10 

### 110 ItO 

### 110 130 NA NA NA NA NAoo NA NA · NA NA NA 2.4 2.4 1

. 9 

### 1.9 2

.7 8.1 8

. 1 8

. 1 8

. 1 8

. 1 NA NA NA NA NA 

### NA 

### NA NA NA NA 97 97 98 96 110 NA NA NA NA I NA 650 630 620 630 650
NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ' NA NA NA NA NA NA NA NA NA 

### NA NA NA ' NA NA NA NA NA NA NA NA NA NA NA NA 

## N

A NA NA NA NA

**~** NA NA ., NA ' NA NA 

## NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ·, NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA VOLATILE ORGANICSIPURGEABLE ORGANICS Acetone U

. g/1 I NA NA NA 3.8* Jul Jul 1995 1995
NA NA NA NA 120 120 NA NA NA NA 2.6 2.4 8.0 8

. 0 NA NA NA NA 110 100 NA NA 660 630
NA NA NA NA NA NA NA NA NA NA NA • NA NA NA

**~A N~**  NA NA NA NA NA NA NA NA NA NA NA NA NA NA RA NA NA NA
NA NA Chloroform J.lg/1 NO NA NA NA ND , NA NA Chloromethane j.lg/1 ND NA NA NA Naphthalene Ug/1 NO NA NA NA Toluene U.!!fl I NA NA NA Vinv I Chloride u

_ g/1 

### ND NA NA NA SEMI-VOLATILE ORGANICS: None Detected HERBICIDES, PESTICIDES , & PCBs: None Detected
NOTES:

**~Sample** was not analyzed ror this pnrumeter during the specified sampling round.
Otndi cates that the analyte was not dete c ted above laboratory practical quantitation limit (PQL). Value listed is MDL or estimated trace concentration (BOLDED)

. 

### [EQJ Constituent not detected; MDL not provided

.

* Analyte also found in blank( s). (a) Suspected laboratory/field contaminant.

D:\SUM;\IER\FALL\PICACHO\PICM\V4.xls\LOI2J/2010 

### ND

. NA NA No: ' NA NA I NA NA ND NA • NA Jul Jul Jul 1995 1996 1996
NA NA NA NA NA 

### NA 130 123 123 NA 

### O.o3 NA NA NA NA 2.3 2.11 2.20 8

. 0 8.00 8.0 1 NA NA NA NA 947 947 110 97.0 100 NA 0.28 NA 680 566 610
NA 0.005 NA NA 0

. 005 NA 

## NA 0

. 1 NA NA 0.001 NA NA 0

.003 NA 

### NA 0.005 NA NA 0.003 NA NA 0.003 NA • N

A 0.033 NA NA 0.002 NA NA 0

. 003 NA NA 0.005 NA N A 0.001 NA NA 0

.005 NA NA 0

. 040 NA NA 0.003 NA , NA 0. 01 NA
NA 1.2 . NA NA ND NA NA ND NA NA 

### NO NA NA 0.4(a NA NA ·' N D NA

### TABLES PICACHO SOLID WASTE SITE

HISTORICAL SUMMARY MONITORING WELL P-MW-4 (CONT'D) Jul Jul 

### Se pt Sept ANALYTE 

### UN IT 

### 1996 1996 1996 1996 

### GENERAL CHEMISTRY Bicarbonate Alkalinity mg/1 NA 

### Ni\ NA NA Carbonate Alkalinity mg/1 NA NA 

## 1'1)\ · NA Chloride mlUI 117 124 

### LIS 115 Cyanide 

### mJVl NA NA• 

### Ni\ NA Hydroxide Alknliniry tng/1 NA NA NA r 

### NA Nitrate as N mgfl 2.11 2.03 2 .3 7 2.41 pH uni ts 7

. 99 

### 8.0 1 7.62 7

.75 Pen:hlonue mwl NA NA NA NA Specific Cond u ctance I 

### J.Lmhos/cm 923 937

**NA ~**  

### NA Sulfate 

### mg/1 1 00 97.0 

### 96

.9 94.4 Sulfide mg/1 

### NA NA NA NA Total

**Di s~olvc**  **d** 

### Solids mgll 598 

### 550 528 558 METALS Amimony mg/1 NA NA NA NA Arseni c mg/1 NA NA NA 1 

### NA Barium mgfl Nl\ 

### NA

. NA NA Bervllium mwl NA NA NA NA Cadmium mg/1 

### Nl'\

. NA

**N~** 

### NA Chromium mg/1 NA

**A' ~**  

### NA Nt\ 

### Cobalt mgfl 

### NA NA NA I NA CopJ)er mgll Ni\ NA NA NA Le&d 

### mwl 

## NA N.% NA 

## NA Mercury 

### mg/1 NA N N · ' NA NA '

**·~** 

### Nickel mg/1 NA

. NA•··· 

### NA' NA Se lenium mg/1 NA 

## NA NA· NA

. Silver mg/1 

### NA 

## NA NA NA Thallium 111.1:/1 NA 

### NA- < Nl\, 

## N.A: Tin 

### mg/ 1 NA NA\ NA Ni\ 

### Vanndium mg/1 NA NA NA 

## lilA Zinc mgll NA NA Ni\



### . NA VOLATILE ORGANJCSIPURGEABLE ORGANICS Acetone UlUI NJI\ NA 1. 2- 

### ' NA ChluroFom1 uwl

**NA ~**  

### NA 

### ND Nt\ 

### Chloromethane J.l.g/1 NA NA' 

### Jim NA Naphthalene lJ-gfl 

### NA NA " ND 

### N'A: Tol uen e u

. J!Il 

### NA Ni:l." 

### 0.3

**~** 

### NA Vinyl Chlorid e Ul!ll

**N~ N~**  

### Nli> NA SEMI- VOLATILE ORGANICS: None Dctc.ct

. cd HERBICIDES,

**Pf TfCID**  **ES .**  & 

### PCBs; Nonc.Dctcc l cd
NOTES:

**~S:Jmple** was not analyzed for this parameter during the specified sampling round.
0Indicates that the analyte was not detected abo ve laboratory prnctical quantitation limit (PQL). Value listed is MDL or estimated trace concentration (BOLDED). 

### [BQl Constituent not detected ; MDL not provided

.

O :\SUi\ThiER\FALL\PIC,\CHO\PlCMW4 , xls\10/2112010 

### Se pt Sept 

### 1996 1996
NA

. NA NA 

### NA: liS 115 t-IA NA

- 

### NA NA 2.33 2.55 7

.73 7.75 NA

- 

### WI 

### NA, Nit: 96.9 94.4

**~A** 

### NA 556 540


### I'! Ai NA NA NA NA Ni\ 

### Ni\

_ NA NA • 

## NA: NA I ' NA NA NA NA: 

### N'A 

### NIX · NA 

## NA NA 

### NA

**N~** 

### NA' NA NN NA NA 

### l'IA NA 

## NA N'A NA 

## NN

**N~** 

### NA; NA NA 

### Ni\ NA •
. Ni\ 

### NA' NA 

## N:A. Ni\l NAJ, NA 

### Jul Jul 

### Jul Jul 

### 1997 1997 1997 1997
NA NA NA NA NA '-' NA NA 

## NA 115 1 20 ll5 115 

### Ni\

- NA NA NA • 

### NA· NA NA NA 2.1 2

. 1 2. 1 1.76 7.56 7

.53 

### 7.52 7.54 

### NA. N JI\ 

### NA NA 

### Nl\ · 

## NA NA NA 79.4 

### 69.5 72.2 

### 68.9 N'A 

## NA N'A 

### NA., 592 516 580 606
NA NA NA • NA NA NA> cJ NA NA NA NA NA NA 

### NA Ni\: NA NA NA Ni\, 

### NA NA

_ NA 

### NA N;A. 

### NN NA · NA NA 

### Nl\ N

A NA: NA NA" 

### !)(A

·· NA NA N'A NA NA •• NA

**N~** 

### NA·· 

### NA' l NA NA-. NA • NA NA NA Nl\ Nl\ ' NA Nt\

**NA ~**  

### NA NA 

### Ni\ NA !'(A NA 

### NA NA IN A NA

**~A ·**  

### NA NA• NA NA

1.2 

### NA NA NA • ND , Nl\ '

. NA 

## NA: I'lD NA NA NA • 

### ND NA NA NA:\'. 

### O f.3 

### Ni\ 

### NA NA ND Nl\ NA NA

### TABLES PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-4 (CONT'D) Se pt Sept Se pt Sepl 

### Mar ANALYTE UNlT

.1997 

### 1997 

### 1 991 1997 1998 GENERAL CHEMISTRY Bicarbonate Alkalinity mg/1 NA NA NA NA NA

**C~rbonate** 

### Alkalinity

_ mgll NA 

### Nl\ 

### NA NA 

### NA Chloride mg/1 110 110 

## llO liO Il l Cyanide mg/1 NA NA NA 

### NA 

### NA HydrO;< ide Alkalini ty 

### m!!/1 NA lilA NA NA NA Nitrate nsN mg/1 1.49 1.88 1.51 2.4 1 2.6 

### _ll._H units 7

. 85 7

. 87 7.85 

### 7 .87 7

.7 9 Pcrchlomte mg/1 NA NA NA NA NA Specific Conductance 

## I

**~!mhos/em** 

### N'A: NA NA 

# N m f\111\ , 

### Sulfate mg/1 75 69 66 65 

### 88 Sulfide mg/1 

### NA NA

_ 

## N1\ NA NA • Total Di sso lved Solid s rng/1 

### ll64 547 

### 550 570 567 METALS Antimo n y mg/1 

### NA NA I NA NA NA •. Arsenic mg/1 Nl\ N1\ 

### NA

. NA ·

**~** 

### Barium mg/1 NA NA NA NA c• Bery Ui urn ml!ll 

### NA NA. 

### NJII NA Cadmium mg/1 

### N/\ 

### NA , NA' NA Chromium mg/1 NA NA• NA Nl\' 

### Cobnlt mg/1 Nl>i Nl\ 

### NA 

## NA COPDCJ' mg/1 N/\ 

## NA N/( 

### )'fA Le nd m_g/1 NA NA ' ,. NA ' 

### NA Mercury mg/1 Nl>l NJ\ 

### N'A 

## NA Nickel mgfl Nl'\ 

### NA

**N~** 

## NA Selenium mg/ 1 

### NA

**NA' ~**  

### NO'\ 

### N-i\ Silver rng/1 

### Nli NA' NA 

### NA Thallium mg/1 NA N,A ·! 

### N'A NA Tin mg/1 NA 

### NA NA NA V

annd ium mg/1 NA NA 

### NA 

## NA Zinc mg/1 NA_ 

### NA t NA ' N:A 

### VOLA TILE ORGANICS/PURGEABLE ORGANICS Acetone ltg/1

**-21** 

### NA 111 

### NA NA

. Chlorofom1 ul!ll

**Nli> ~**  

### N
· N 

### lilA · Nl\ 

### Chloro met hane ).lg/1 NO 

### NA \· 

### NA NA: · Nllllhthnlenc j.l g/1 

## NO

**N.b< ~**  

### NA N
· A. 

### Toluene ul!ll 

# o :a

1 NA• 

### N'fi.' " 

## NA ' Viny l Chloride u_g/1 ND ' 

### N:.Ao· NA: NA SEMI-VOLATILE ORG-ANJCS: None Detected HERBICIDES, PESTlCIDES, & J>CBs: None Detected NOTES : [E6)Sample was no1 anaJyzed r o r this parameler during I he s pecified samp lin g round.
0Indi ca t es that the analyte was not dete(;tcd above labora tory practical quantitation limit (PQL). Value li s ted is MOL o r es timated trace concentmtion (BOLDED). 

### [Bill Constituent not detected; MDL not provided.

(a) Suspected laboratory/field contaminant.

1 )1.\SUI\ tM &R\t'"Af.I

.. V'ICA

. C IIO\JII CM\Vot.xls\10/ZI/lOIO 

### Ni\: 

## NN (\fA .-,1



### . NA NAI NA ' NA,

. 

### NA

\\

**N~** 

### NA NA NA 

### N'A

**~A** 

### ' NA

**~.' 75**  **~**

**0.06 ~·**  

### ND • ND

_ 

# o

: o1 · NJi)l Au g 

### 1998
NA: NA 116 

### NA NA 2.8 8.10 

### NA: 

## N'A NA NA 576
NA NA NA: 

## ., NA 

### NA N/\ NP\ fXA 

### t{A: 

## NA NA 

## NPi NN., NA NA 

### NA 

### NA
5:75 ·

**o~ ·**  

### ND Nl) l ' 

### O.Ci7· NO Mar Mar Aug 

### Feb 

### 1999 1999 1999 

### 2000
NA NA NA 

## NA Nl\ NA NA

.. NA Ill 

### 103 100 99.3 NA> c NA NA NA , NA NA NA NA 2

. 12 1.82 2

. 32 2.75 7.76 NA \

. 7.82 8. 15 

## NA NA '

**NA, ~**  

### NA' 1023 

## NA 993 952 NA

**~** 

### NA 

### NA 

### '!\lA NA

**N~** 

### NA' 573 572 

### 554 

### 566
NA

. Nl\ · 

### NA i• 

### NA NA 

### NA: NA NA NA 

### lifN NA 

### NA' NA N Aio' 

### NA 

### NA Nll. 

### lilA' NA NA 

## Nl'l NA 

## NA NA I: Nl\ 

### N"-' 

## NA NA \ Nf\. 

### NA· NA NA' 

## NA N/'i

**N;~i .**  

## NA 

## N:.>.
·· " N'A '

**N~** 

### 1 NP< 

### NA

**~** 

### NA -1

**N~** 

### Ni+; NA NA 

## NA . NA 

### N A" lilA

. NA 

## NA t\IA NA

. NA:

**N~** Jil)l, 

### NA

**N~** 

## NA

**N~ •**  

### NA NA· 

### NA NA NA NA

o: s2 NA: 1.79

. 1.79 

### O J J'l Nl\ v 

### 0

.07 0.07 

### O l l> NA >, 

### 0.4,19(a) 

### M!l

. 0 : 3

.

2 N"A ? 0 ! 10 •0.189 o: os 

### NA I O.D7 · 0 .'0 7 " ND

**N~** 

### o : o6 :

**0.06 ~** ANALYTE GENERAL CHEMISTRY Bicarbonate Alkalinity Carbonate Alkalinity Chloride Cyanide Hydroxide Alkalinity Nitrate as N pH Perchlorate Specific Conductance Sulfate Sulfide Total Dissolved Solids METALS A.otimooy Arsenic Barium Beryllium Cadmium Ch.r.omium Cobalt Copper Lead Mercury Nickel Selenium Silver Thallium 

### Iio Vanadium Zinc 

### TABLES PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-4 (CONT'D) Feb Aug Feb Feb Aug Feb UNlT 2000 2000 2001 2001 2001 2002 m_g/1 NA NA j 210 NA NA NA mg/1 NA NA 20

. 0 NA NA 

## NA mg/1 98.4 106 137 137 11 0 

### l!O rrudJ. NA NA<**~·** 0.0100 NA' NA NA mg/1 NA NA • 20.0 NA NA NA mg/1 2.81 2

. 79 2

. 89 2.86 2.6 3

. 0 units NA 7.7 6 7.87 NA 7

. 96 7.85 mg/1 NA 

## NA NA NA NA ' NA umhos/cm NA 969 94 6 NA 926 880

mg/1 NA NA 104 NA NA NA mg/l NA NA 0.500 NA NA NA mg/1 555 510 602 582 610 590 mg/1 NA NA; 0.060 NA NA NA m_g/1 NA**NA ~**  0.100 NA NA , NA mg/1 NA ' NA 0.0147 NA NA ' NA mg/1 NA NA 0.001 NA NA NA oag/1 NA NA 0.010 · NA NA NA mg/1 NA NA 0.014 3 NA NA NA mg/1 NA NA ().007 NA NA NA · mg/1 NA NA ' j' 0.010 NA NA NA ' mg!l**N~ -~**  N A 0-015 NA NA NA mg/1 NA NA 0.0002 NA NA NA m_g/1 NA NA 0

.030 NA NA NA ' mg/1 NA N A 0.100 • NA NA NA mg/1 NA NA 0.007 ' NA 

## NA NA**m.~:/1** NA

. NA · ().100

. NA NA NA -;;1 mg/1 NA NA_ ' 0.250 NA NA NA mg/1 NA NA 0.0148 NA NA NA mg/1 NA , NA ().020 NA NA NA VOLATILE ORGANICS/PURGEABLE ORGANICS Acetone U!!!l NA ! 1.79

. L79 1.79 1.9(a) 5

. 0 Feb Aug 2002 2002

NA NA 

## NA NA 120 120 NA

. NA NA NA 3.1 3.7

### NA**~** 7.96 NA

. NA NA 886 NA NA NA NA 590 57 0

NA NA • NA NA NA NA NA ; NA NA NA NA

.. ,· NA

. 

## NA NA 

## NA NA 

### NA. "' NA NA NA NA NA NA NA NA NA NA NA NA NA 

## NA NA NA )'lA

NA 5.0 Chloroform ug/1 NA 0.07 0

.07 0.161 0.07 0.50
· NA 0.50 Chloromethane u_g/1 NA 0

. 14 0.14 0.14 Naphthalene ug/1 NA' Q , lO 0.10 0.10 Toluene Ug/l NA 0.07 

### 0

. 0] 

# om Vinyl Chloride U.!:/1 NA 0.06 0.06 0.0702 SEMI-VOLATILE ORGANICS: None Detected HERBICIDES. PESTICIDES. & PCBs: None Detected NOTES:**~Sample** Wi.IS not analyzed for this parameter during the specified sampling round

. 0Indlcates that the analyte was not detected above laboratory practical qunntitation limit (PQL). Value listed is MDL or estimated trace concentration (BOLDED). 

### [EQJ Constituent not detected; MDL not provided

.

(a) Suspected laboratory/field contaminant.

D:\SUi\L\IER\FALL\PICACHO\PIC\1W4

. xls\1012112010 r 0.22(a 0.50 NA 0.50 0

. 10 0.50 

# NN o.so O.OJ ().30' NA 

## o , ao 0.06 ND NA ND Feb Aug 2003 2003

NA NA NA NA 11 0 11 0 NA NA NA NA 2.6 0.25 8 .12 7

. 95 NN NA 872 953 NA NA " NA NA 620 550

NA NA NA NA NA 

## N:N NA NA NA NA NA**~-** NA NA NA NA NA NA NA NA ,., NA NA NA NA ' N A NA NA NA , NA NA NA NA NA NA NA
1;4**~** 2.0 1.4 0.19 Oil 4 0.36 !l. 078 

### 0.049 

# o.u l:·'· 0.13 ND , ' ND

### ANALYTE GENERAL 

### CHEMISTRY Bicarbonate Alkalinity 

### TABLES PICACHO SOLID WASTE SITE

HISTORICAL SUMMARY MONITORING WELL P-MW-4 (CONT'D) Apr Aug 

### Feb Sep Feb A11g UNIT 

### 2004 2004 '2005 2

_ 005 2006 2006
mfV] 

### NA 

## NA NA NA• N"A: 

### NA Fe b Aug Feb Aug 

### 201}7 

### 2007 2008 2008
NA , NA NA NA Carbomue Alkalinity mJ!/1 

### NPI N'A**N'l\ ~**  

## NA**N~** 

### 8.00 NA I' 

### NA 

### J\!_.6; 

### NA Chloride mg/1 Ill 110 112 116 

### !OJ 106 102 98.5 

### 101 103 Cyunidc mg/1 

### I':!**A: ~** **N~ '**  

### NA Nl\ \· 

## NA, O.oi 

### NA NJ\ , 

## NIX 

## NA Hydroxide Alkalinity 

### ml!ll 

## NA NA: NA ,; 

## NA NA NN NA NA

. NA! , 

### NA

. Nitrate as 

## N mJU') 

### 2.60 3

. 15 2.40 2

. 75 2.65 2.60 2.60 2

. 50 4

.45 2

. 80 pH units 7

.7 7

. 8 8

.0 

### 8

. 1 8.1 

### 9

.0 7

. 9 7.4 8.0 7.78 Perelllorate rng/1 

### NA NA 1\fA \: 

### NA• NA 

### 0.0020 1 NA 

### N1\

- 

## Nk NA Specific Comlucmncc u.mbosfcm 960 960 840 850

- 940 820 730 990 920 862 

### Sulfate mg/1 93

.5 83.0 85.0 82

. 9 83.0 

### 87

. 2 71.4 79

. 5 78

.9 80.9 Sulfide 

### mwl 

### NA' 

## NA 

# ,, llfA. · 

## NA N'l\.

- o.o· 1 , 

## NA NA N/\ • 

### NA "' Total Dissolved Solids rng/1 785 612 

### GOO 600 

### 592 592 620 

### 640 608 564 METALS 

### Antimony mwl NAI N& 

### NA -, 

### N:N NA'' 0:0" 5 \**N~** 

### NA ' 

### NA**NA: ~**  

### Al"licnic mw'l 

### NA c 

### N:.\ 

## NA N*- 

### NA 1**o5 ~**  

## NA N)\\ ' 

# NA NA Barium mgll**Nl\ ~**  

### NA 

### N 1 V

. NA: 

## NA**03 ;**  

### NA:**~** 

## _ N

· w

· NA

. Bervllium mg/1 NA NA 

### NA N"PI 

### N\6.. ' O.Ol 

### N.A**N~ -,**  

### NA NA Cadmium mgfl 

### NA. .-! 

### NA

. 

## NA NA ' ' 

### NA 

### Ml N"A 

### filA·**N~ ·**  NA: , 

### Chromium mw'!**N~** 

### N.k NA 

### Nl'i 

### N'A: ' 0.012**N~ ~**  

### Ni61 NA: NA Cobalt IURII 

### NA 'i 

## NA: I'tA · 

### NA • N/tl\ 

### (Y:'<Yl**N~ ·~**  

## NA• N'A NA c· Copper m.c/1 NA NA 

### NA N • AI Ill

### A 0,01

_ 

### NA 

### NA':- N'A NIL Lead mg/1**N~** 

## NA NA**N~** 

## NA 0.05 NA 

### l'i!A\

.**Ill~ N~**  Mercury 

### !l)J!/1 NA 

### 'N'A NA·.- 

### N
· A: NA " (tOOl NA NA NA NA Nickel mg/1 NAi 

## NA NA .- . NA "' 

### • NA o :ot 

## NA NAI• 

### NA: Nil\ Selenium mg/1 

### NA , NA 

### NA ' NN NA · o : 65 -:. . NA' ,!i 

### Ni\, ' NJI..c NA Sliver 

### m!!/1 NA' · 

### Nk.. NA \ Ni-\i 

### NA

- 

### 0.01**N~ ·**  

### NA N'A: ·· NA: 

### Tim Ilium mg/1 N ' tt 

### N/\ 

### NA :''
. NA: 

# "' Nl-\**o~os ·**  

### NA 

### NM .· NA 

### NA 11n mr:/ 1 NA '**N~** ' 

### NA N
· A: NA •"' o.Jor 

## NA NA NA \ NA 

### Vanadium mwl Nlt\ NA 

### NA

- 

### Nl-\t 

## NA O.<tl i i NA 

### l'iiA•

.**N~** 

### NA Zinc mg/1 

### NA 'I! NA 

### NA 

### NAI Nt\ 

### 0;026**N~** 

### Ni\: 

### NA NA' VOLATILE ORGANICS/PURGEABLiil ORGANICS**AcCLOJI<~ ~lg/1** **'75 ~**  

### • ! :'i'Sf**'t-5** 

### 1.15 · 1.17:5 -::! 

### 1 ) /,5 

## '' · 1.1s , 1)'7:5**Lt,J$ ~**  '**:]5 •**  

### Ch lorofom1**u~/1** 

# o :01

- o :ow om o :o'l**om ~** **07 l**  

### o: o1 1 o :o1 

## o : o1 '' 0.0

. 1 i Chloromethane UJ:/1**'4-1 1** **0.14 ~** **0!1~** 0 ! (4

. 

### 0'1 1'1-' 

### O tl'4**0.1~** 

### 0J l4 -' 1}.{4

_ Naphthalene.**~lr.11** 

### NA) 0.05

- 0.0:! · o :os ' 0.05 

# o : os
. o: os.
. 

# o : o.s 0

. . 05**o.os: ~**  

### Toluene Ill!II**~** 

# o.o1; O ! <i7 

# o : or o: o1 , 

### O T 07

. O I 07, O':o<z om 0

.07 Vinyl Chloride u!!/1**10 1**  

### O.LO

. 0

. 10 6 :• 10 ' 0 .' 10 

# o :JO**~ ~o**  Q ;JO 

## o:to o : to :. SEMI-VOLATILE ORGANICS: None Detected HERBICIDES PE..'iTlCJDE;S, & 

### PCBs: None llelected
NOTE S:**~Sample** was not ::mnlyzed for this parameter during the specified sampling round

. 0Indicates that the analyle was not detected above laboratory practical quantitation limit (PQL). Value Listed is MDL or esllmated trace concentration (BOLDED).

### TABLES PICACHO SOLID WASTE SITE HISTORICAL SUMMARY MONITORING WELL P-MW-4 (CONT'D) Jun Sep F eb Aug ANALYT E UNIT 

### 2009 2009 2010 2010 GENERAL CHEMISTRY Bicarbonate Alkalinity mg/1 NA NA , NA NA C arb onat e Alkalinity mall NA NA NA NA Chloride mg/1 120 110 1 20 11 0 Cyanide mg/1 NA NA NA NA Hydroxide Alkalinity mg/1 NA NA NA NA Nitrate as N mg/1 2.9 2

. 6 2

. 8 2 .7 pH units 8.2 7.92 7

. 93 8

. 00 Perchlorate mg/] NA NA NA NA Specific Conductance l llmhos/cm 957 1050 987 1000 Sulfate mg/1 89 85 87 82 Sulfide mg/1 NA NA NA NA Total Disso lv e d So lids mg/1 550 540 6 10 620 METALS Antimo ny mg/1 NA NA NA NA Arsenic mg/1 NA NA NA NA Barium

**m~** N A NA ·. NA NA Be ry llium mg/ l NA NA NA NA Cadmium mg/1 NA NA NA NA Chromium mg/1 NA NA 11 NA NA Cob alt mg/1 NA NA NA NA Copper mg/1 NA NA NA ' NA Lead mg/1 NA NA NA NA MercufY mg/1 NA NA NA NA Nickel mg/1 NA NA NA NA Seleoi_um mg/ 1 NA NA NA NA Silver 

### rng.il NA NA NA NA Thallium mg/1 NA NA 

### N A NA Tin mg/1 NA NA NA

. N A Vanadium mg/ 1 NA NA NA t'IA Zinc mg/l NA NA NA NA VOLATILE ORGANICS/PURGEABLE ORGANI CS Acetone J,lg/1 7

. 4 7

.4 

### 4

.6 4. 6 C hloroform j.t g/ 1 0

. 23 0

. 23 0

. 072 0

. 12 Chloromethane ug/ J 0.20 0

.20 0.11 0

. 14 N ap llthal en e ug/1 

### 0.30 '

. 0

. 30 0

. 36 0.36 T oluene J,Lg/ 1 0.12 0 .12 0

.093 0. 093 Vinyl Chloride J,lg/1 0.16

. 0.16 0

. 14 0.12 !'SEMI-VOLATILE ORGANICS: None Detected !HERBICID E S, PESTICIDE S, & PCBs: None Detected
NOTES:

**~Sample** was not analyzed fo r thi s parameter du ri ng the specified sampling round.
D lndicate s that the unalyte was not detected above laboratory practical quantitation limit (PQL). Value li s ted is MDL or estimated trace concentration (BOLDED)

. [EgNo ca\cu\atiun performed. Requires a minimum of three r.Jata entrie s. MED.

NC NC Ill NC NC 2.48 7.94 NC 94] 87

. 6 NC 590

NC NC NC NC NC 0. 0 12 NC NC NC NC NC NC NC NC NC NC NC

NC NC NC NC NC _N C STD. AVG. D E V. MIN. MAX.

NC NC NC NC NC NC NC NC 113. 2 8

. 8 98.4 137 NC NC NC NC NC NC NC NC 2.42 0

. 51 0.25 3.7 7.92 0

. 24 7.4 9.0 NC NC NC NC 929 68 730 1 050 

### 88 

## u. s 65 110 NC NC NC NC 59 1 46 510 785
NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC 0.0 10 0.005 0.005 0.0143 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC N C NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC
NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC N C NC NC NC NC NC NC NC N C