Lehigh Reclamation Plan Amendment

8/6/2019 Lehigh Reclamation Plan Amendment

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Reclamation Plan Amendmenfor

Permanente QuarryState Mine ID # 91-43-0004

Submitted to:

Santa Clara County

Prepared for:

Lehigh Southwest Cement CompanyPermanente Quarry

24001 Stevens Creek Blvd.

Cupertino, CA 95014

Prepared by:

Inc. 3511 Camino Del Rio South, Suite 403



Table of Contents

Topic

1.0 Introduction

2.0 Environmental Setting

2.1 RPA Location 2.2 Legal Description 2.3 Land Use and Zoning 2.4 Climate 2.5 Geology 2.6 Soil Types 2.7 General Physiography 2.8 Surface and Groundwater

2.9 Biological Resources

3.0 Reclamation Plan

3.1 Owner/Operator/Agent 3.2 Operations Data 3.3 Operational Characteristics 3.4 Topsoil and Overburden Management 3.5 Blasting 3.6 Material Handling 3.7 Material Processing 3.8 Operational Water and Dust Control 3.9 Storm Water and Erosion Control 3.10 Process Fines 3.11 Site Security and Safety 3.12 Utilities 3.13 Off-Site Traffic

3.14 Reclamation Overview 3.15 Reclamation Phasing 3.16 Reclamation Standards

3.16.1 Wildlife Habitat 3.16.2 Backfilling, Regrading, Slope Stability, Recontouring 3.16.3 Revegetation, Topsoil Salvage, Maintenance and



3.17 Drainage, Diversion Structures, Waterways and ErosionControl and Stream Protection, Including Surface and

Groundwater 3.18 Building, Structure and Equipment Removal 3.19 Public Health and Safety 3.20 Effect of Reclamation on Future Recovery of Mineral Resour3.21 Financial Assurances 3.22 Administrative Requirements 3.23 Statement of Responsibility

Figures

Figure Title

1.0-1 Regional Location Map 1.0-2 USGS Vicinity Map

1.0-3 Quarry Location 1.0-4 Quarry Parcels 1.0-5 Reclamation Plan Boundaries 1.0-6 RPA Area 2.3-1 General Plan 2.3-2 Zoning 2.3-3 Surrounding Land Uses 2.6-1 Soil Types 2.7-1 Existing Topography 2.9-1 Vegetation Communities 3.3-1 Quarry Components 3.3-2 Mining Process 3.7-1 Quarry Conveyor Circuit 3.7-2 Rock Plant Facilities 3.15-1 Existing Operations 3.15-2 Mining and Reclamation Phase 1 3.15-3 Mining and Reclamation Phase 2

3.15-4 Mining and Reclamation Phase 3 / Final Rec3.15-5 EMSA Phase A 3.15-6 EMSA Phase B 3.15-7 EMSA Phase C 3.15-8 Reclamation Phasing Overview 3.15-9 EMSA Reclamation Phases 3 15 10 WMSA R l i Ph



Tables

Table Title

1 Quarry Components 2 Phasing Timeline 3 Erosion Control Seed Mix 4 Preliminary Species for Hydroseeding 5 Preliminary List of Trees and Shrubs 6 Riparian Revegetation 7 5-Year Performance Standards for Revegetation 8 Sedimentation Basins 9 Qualitative Descriptions of Soil Surface Status 10 Remedial Measures for Erosion Control

Attachments

Unbound Attachment Oversize Reclamation Plan ExhibitsAttachment A Legal DescriptionAttachment B Revegetation PlanAttachment C Geotechnical ReportAttachment D Biological Resources AssessmentAttachment E Hydrologic InvestigationAttachment F Drainage ReportAttachment G Water Quality Report

Attachment H Air Quality AnalysisAttachment I 1985 Reclamation Plan



1.0 Introduction

The Permanente Quarry (Quarry) is a limestone and aggregate minilocated in the unincorporated foothills of Santa Clara County (County) (Fthru 1.0-4). Mining commenced in 1903 and has been continuous sincthe Quarry is considered a legal nonconforming use (i.e., vestedPermanente Cement, Inc. owns the Quarry and Lehigh Southwest Cemeis the operator (collectively, Lehigh).

The California Surface Mining and Reclamation Act (SMARA) providemining operation in the state must have a lead agency-approved reclam

The lead agency for the Quarry, the County of Santa Clara (County), acurrent reclamation plan in March 1985 (1985 Reclamation Plan, Attachm1985 Reclamation Plan encompasses 330 acres, representing areas thsupported active mining and material stockpiling (Figure 1.0-5).

This Reclamation Plan Amendment (Amendment) updates the 1985 Reclato include an approximately 811-acre area (hereinafter, the RPA Area), textraction areas, processing areas, roads, support features and oth

(Figure 1.0-6). The focus of this Amendment is the reclamation of exisoperations, which are almost entirely disturbed. The activities descriAmendment cover an estimated timeframe of approximately the next 20 y



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Figure 1.0-1 Regional Location Map

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Merced

Stanislaus

Santa Clara

San Joaquin

Alameda

Marin

San Benito

Contra Costa

Solano

Monterey

Santa Cruz

Fresno

Calaveras

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Project Site

PermanenteQuarry



Figure 1.0-2 USGS Vicinity Map

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City of Cuper

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Figure 1.0-3 Quarry Location

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351-09-021

351-10-037

351-10-033

351-09-022

351-11-001

351-09-011

Figure 1.0-4 Quarry Parcels



Figure 1.0-5 Reclamation Plan Boundaries

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Figure 1.0-6 RPA Area

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2.0 Environmental Setting

2.1 RPA Location

The area subject to this Amendment is referred to herein as the RPA AreArea contains approximately 543 acres of mining operations. It is escontinuing mining and future reclamation work will occupy another 51 acacres of ultimate disturbance. To this, Lehigh has added an approximatvegetated buffer area where no mining operations will occur, for a total 811 acres.

The RPA Area is situated within the larger Lehigh ownership totaling ap3,510 contiguous acres. The Quarry is located in an unincorporated

western foothills of Santa Clara County near the city of Cupertino, appromiles west of Cupertino and 3.0 miles west of the intersection of InterstHighway 85. The majority of Lehigh's land holdings are not incorporaAmendment and will remain undisturbed (See Figure 1.0-6). Quarrprovided by Stevens Creek Boulevard and Foothill Expressway, contin

western terminus of Permanente Road.

2.2 Legal Description

The legal descriptions for parcels affected by the Amendment are Attachment A.

2.3 Land Use and Zoning

Mining activity at the Quarry began by 1903. Surface mining activitiecontinuous since at least 1939 and have been formally recognized by the legal nonconforming (i.e., vested) use.

RPA Area

The majority of the RPA Area is designated under the County GenHillsides (HS) with a small portion designated as Other Public Open La

The remainder has no County General Plan designation because it is wit

of Cupertino’s Urban Service Area (See Figure 2.3-1). The entire RPA Areto the County zoning ordinance, and is classified as Hillside (HS), Agricuand General Use (A1-d1 and A1-20s-d1) (See Figure 2.3-2). The CupertPlan designation for land within the Urban Service Area is Very LResidential, and recognizes the existing quarrying uses within the UrArea.



Other non-owned land uses to the south, including some rural residentiaand small agricultural operations are over 0.5 miles away. Existing u

owned lands to the north include the Rancho San Antonio County Park the Mid Peninsula Regional Open Space District (MPROSD). Non-owned east include the Rancho San Antonio County Park, a cemetery andsubdivisions. The nearest residence is located approximately 2,000 northeast of the RPA Area. Surrounding lands are generally subject to Plans and zoning ordinances of Santa Clara County, the City of Cupereast) and the City of Palo Alto (to the west).

2.4 Climate

The RPA Area lies within a semi-arid Mediterranean climate zone char warm summer and mild winter temperatures with a substantial contributing to vegetative community differences on north- and south-faRainfall occurs mainly from November through April. Average annuaabout 22 inches; however, precipitation can range widely from year tnorth-facing slopes, conditions are moister and less warm than on slopes as evidenced by the dramatic differences in vegetative communitie

Area contains both north-facing and south-facing slopes.

Typically, winds tend to blow from the mountains toward the valley southwest to northeast direction. Winds are light averaging between 6During the summer, winds shift to blow from the north and northeas

wind speeds range from 5 to 10 mph.

Temperatures range from the low 40’s to about 60 degrees Fah

November through April. During the remainder of the year, temperafrom the high 40’s to the high 80’s.

2.5 Geology

The geologic structure underlying the RPA Area and vicinity are detGeotechnical Evaluations and Design Recommendations (Geotechnicunder Attachment C. In general, the regional geologic structure is domiCoast Range structural province, consisting primarily of

northwest/southeast-trending structures. The San Andreas fault zoapproximately three miles west-southwest of the Quarry, is the major tecof the province displaying this trend. The Sargent-Berrocal fault zone the east. This fault zone subdivides into two subsidiary fault southwestern-most Berrocal Fault Zone and the northwestern-most Fault Zone. The Berrocal Fault Zone trends northwest, dips steeply no

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Figure 2.3-1 General Plan

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Figure 2.3-2 Zoning

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Figure 2 3 3 Surrounding Land Uses



Figure 2.3-3 Surrounding Land Uses

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Stevens

CreekQuarry

Low-density Residential and Agricultural Uses

Midpeninsula Regional Open Space District

CiCup

MidpeninsulaRegional OpenSpace District

StevensCreek

Reservoir

Rancho San AntonioCounty Park

Residential

Gates of HeavenCemeteryCity of

Palo Alto



and Potentially Active Faults and their Earthquake Characteristics . The prtypes in the vicinity belong to the Franciscan Assemblage, which underthe property. The predominant Franciscan rock type is the CaleLimestone. This limestone unit grades from a dark to black, bituminoumember to a gray to white, high-chert-content limestone member.

2.6 Soil Types

The USDA Soil Survey of Santa Clara Area, California (USDA 1958) indicaRPA has nine native soil types (map units) and depicts excavated Quarr“Pit” map unit. These map units are described in detail below. Accordin

survey, the native soils of the RPA were subject to erosion and gugenerally quite shallow, and hosted a plant community almost wholly dscrub. Although historical Quarry activities have disturbed the native sosuccessful restoration plantings and the Quarry’s test plot program haveplant communities and soil characteristics may be restored.

Pit (Ec) - This map unit consists of areas large enough to map where have been made and where the original soil has been removed. Excava

area have been principally for limestone and aggregate production.

Azule silty clay, 20-30 percent slopes (At) - Azule silty clay surface soibrown or pale-brown silty clay that normally varies from 8 to 15 inches insurface soil overlies a brown or pale-brown slightly compact subsoil texture. The underlying material occurs at depths of 20 to 45 inches abrown or light yellowish brown unconsolidated material of clay loam loam texture. In a few places a small amount of gravel occurs in the native vegetation is mostly brush, but there are some areas of this grassland and woodland.

Los Gatos clay loam, 20-35 percent slopes (La) - The Los Gatos surfabrown and become nearly reddish brown when moist. They grade inreddish brown subsoil of clay loam texture. In most places some rococcur in the subsoils. The number and size of fragments increase withsoils are underlain by hard but generally broken or shattered metsedimentary rock at depths of 26 to 38 inches.

Los Gatos clay loam, slightly eroded, 20-35 percent slopes (Lc) - This soilthe noneroded Los Gatos clay loam described above mainly in degree of enumber of places, the exposed soil is somewhat redder and somewhat fithan typical, because of partial or complete removal of the surface soil

with subsoils.



fragments occur in the subsoils. The number and size of fragments indepth. The soils are underlain by hard but generally broken or shattesandstone that has undergone varying degrees of metamorphosis. Maysoils are light brown or pale brown. They overlie light brown or light remedium textured subsoils. In most places rock fragments occur in the sin the surface soils. The subsoils grade irregularly at shallow depthsandstone or conglomerate bedrock.

Permanente stony soils, undifferentiated, 50+ percent slopes (Pa) - Thesareas of Permanente soils are very shallow and stony. The surface soil(becoming nearly reddish brown when moist), medium textured, stony, a

non-calcareous. In most places fragments of bedrock are mixed with soils, which grade irregularly at very shallow depths into light-gray orlimestone bedrock. The natural vegetation is almost entirely brush.

Soper gravelly loam, 20-35 percent slopes (Sm) - The surface soil is a brobrown, slightly or medium acid gravelly loam to depths of 8 to 13 inches.soil grades into a slightly more reddish-brown, moderately compact, wesubsoil of gravelly clay loam texture. The subsoil retards drainage som

causes waterlogging of the surface soil during heavy rains. At depths inches the subsoil grades into a noncalcareous moderately or weakly conglomerate bedrock that is somewhat more permeable than the subsoil

Soper gravelly loam, 35-50 percent slopes (So) - This soil is normallshallower than that on less steep slopes. The natural vegetation is a thicbrush. The typical slopes of Soper soils usually range from 20 to 35 psteep slopes are more common in this area. The surface soils are brobrown, medium textured, and generally gravelly. The surface soils grade more reddish-brown, moderately compact, weakly blocky subsoils of gloam texture. The subsoils in most places are dense enough to retard dmoderate degree. The subsoils grade into brown or yellowish-brown nomoderately or weakly consolidated conglomerate bedrock.

2.7 General Physiography

Topography in the RPA Area and surrounding lands consists of gen

terrain. These areas contain a series of ridges and valleys trending in a g west direction. Steep slopes predominate, with flatter terrain occurring previously disturbed areas. Elevations within the larger Quarry ownershincrease from west to east, ranging from about 500 feet mean sea level (mentrance to the Quarry to about 2,640 feet msl at the western and sproperty boundaries. Elevations within the RPA Area range from approx



2.8 Surface and Groundwater

Surface Water

Natural hydrological sources for the RPA Area include direct pgroundwater seepage, and limited surface run-off from adjacent lands. Tcontains tributaries to Permanente Creek. The Biological Resources (Attachment D) contains a complete description of surface water featureflows from most of the RPA Area drain into Permanente Creek throdrainages or various storm water facilities. Overland flows originatingnorthern portion of the RPA Area drain to the north, and enter Permanen

an unnamed USGS blue-line steam to the north of the RPA Area. ALehigh’s property, Permanente Creek flows generally northwards wherflows from Hale Creek in Mountain View before reaching Mountain ViewSouth San Francisco Bay.

Groundwater

The RPA Area lies within the Santa Clara subbasin of the Santa

groundwater basin. The Santa Clara subbasin totals approximately miles occupying a structural trough parallel to the northwest trending Co

The Diablo Range bounds it on the east and the Santa Cruz Mountaibasin boundary on the west. It extends from the northern border of County to the groundwater divide near the town of Morgan Hill appromiles southeast of the RPA Area. The dominant geohydrologic featurinland valley east of the RPA Area. The valley is drained to the north by tSan Francisco Bay including Coyote Creek, the Guadalupe River, andCreek.

The depth to groundwater varies based on the location within the Rcomplete description of groundwater, seeps, and springs located within tare discussed in the attached Geotechnical Report (Attachment C) andInvestigation (Attachment E).

2.9 Biological Resources (§3703)

Existing Plant Communities

The substantial majority of the RPA Area is already disturbed by miningand little new disturbance is contemplated under the timeframe coveAmendment. Primarily due to the presence of Buffer Zones, however, tdoes include biological communities that should be noted although in lar



and further classifies biological communities based on specific vegetatiobserved within each community. Non-sensitive biological communitiesruderal herbaceous grassland, 2) mixed scrub, 3) northern mixed cchamise chaparral, 5) oak chaparral, 6) poison oak scrub, 7) non-nagrassland, 8) California bay forest, 9) revegetated areas, 10) active disturbed areas, and 12) settling ponds and operational water featurebiological communities include: 13) willow riparian forest and scru

woodland, and 15) streams and ponds.

Non-Sensitive Biological Communities

Ruderal herbaceous grassland - Ruderal herbaceous grassland is not dHolland (1986) but includes habitats previously disturbed and/or reclahave been inactive long enough to recruit a plant community doherbaceous weeds and non-native grasses. Species typical of this plant coCalifornia include brome grasses (Bromus spp.), wild oats (Avena spp.), It(Carduus pycnocephalus ), wild mustard (Brassica sp.), and filaree (Erodiucommunity is widespread throughout California.

Within the RPA Area, ruderal herbaceous grassland primarily occurbetween quarry roads, or in areas adjacent to quarry activities. Areas ruderal herbaceous grassland have predominantly been disturbed by hisactivities. Species typical of this biological community include Italian mustard (Brassica rapa ), lupine (Lupinus sp.), Mediterranean barlemarinum ssp. gussoneanum ), yellow star thistle (Centaurea solstitiali(Nerium oleander ), and slender wild oats (Avena barbata ). Wildlife obseplant community include Dark-eyed Junco (Junco hyemalis ), Ring-ne(Diadophis punctatus ), and California Towhee (Pipilo crissalis ).

Mixed scrub - Mixed scrub includes shrub-dominated communities docoyote brush (Baccharis pilularis ), California sagebrush (Artemisia califCalifornia buckwheat (Eriogonum fasciculatum ) partially described as DScrub by Holland (1986). This community occurs on shallow rocky soils,hot southern exposures of the coast range from Oregon to Central Califorout of the range of coastal fog incursion.

Mixed scrub was mapped in the eastern portion of the RPA Area oexposures. Additionally, small patches of this community type wethroughout the RPA Area where coyote brush or California buckwdominant shrub type. Mixed scrub is characterized as dense to modstands to 1.5 meters tall dominated by coyote brush, California sagebrCalifornia buckwheat with little to no understory vegetation. Associa



Northern mixed chaparral - Northern mixed chaparral is a combroadleaved sclerophyll shrubs two to four meters tall forming impenetrable stands dominated by chamise (Adenostoma fasciculatum )(Quercus berberidifolia ), various manzanitas (Arctostaphylos spp.), amembers of the genus Ceanothus (Holland 1986). This community typdry, rocky, steep, typically south-facing slopes with thin to little soiloccurs below 3,000 feet elevation in Northern California. It is widelythroughout the mountain ranges of California.

Within the RPA Area, northern mixed chaparral was mapped in various east and south-facing slopes. Northern mixed chaparral forms dense i

stands two to three meters tall with high species diversity in the shruintergrades with oak woodlands and oak chaparrals on deeper soils, achaparral on southern exposures. Species typical of this community chamise, scrub oak, Eastwood’s Manzanita (Arctostaphylos glandglandulosa ), jimbrush (Ceanothus oliganthus var. sorediatus ), buckbrushcuneatus ), birch-leaf mountain mahogany (Cercocarpus betuloides ), poisosanta (Eriodictyon californicum ), white pitcher sage (Lepichinia calycina )(Rhamnus californicus ), and redberry (Rhamnus crocea ). There is

understory, but where present include Indian warrior (Pedicularis densiflsanicle (Sanicula crassicaulis ), coyote mint (Monardella villosa ssp.Indian paintbrush (Castilleja affinis ). Wildlife observed in this commincludes Brush Rabbit (Sylvilagus bachmani ), California Thrasher redivivum ) and California Quail (Callipepla californica ).

Chamise chaparral - Chamise chaparral is a one to three meter-tacommunity dominated by chamise with associated species contributoverall cover and mature stands containing very little herbaceous (Holland 1986). Associated species typically include Manzanita species,buckbrush, birch-leaf mountain mahogany, yerba santa, sage (SalvCalifornia buckwheat. It has a general distribution similar to nortchaparral, but is more abundant in southern California.

Within the RPA Area, chamise chaparral dominates southern exposures wsoils. Chamise chaparral ranges from 0.5 to three meters tall forming istands with no herbaceous understory. It intergrades with northern mixe

on eastern exposures, and abruptly borders oak woodland and oak cridgelines. Occasional associates include scrub oak, toyon (Heteromelesand madrone (Arbutus menziesii ). Wildlife observed in this community tySpotted Towhee (Pipilo maculatus ), Bewick’s Wren (Thryomanes bewickii ),Hummingbird (Calypte anna ).



Within the RPA Area, oak chaparral was mapped on various north andslopes where conditions are slightly more mesic than other slopes. It intenorthern mixed chaparral on northern exposures, chamise chaparralexposures, and oak woodlands on flatter north-facing slopes. Species tycommunity include scrub oak, bush interior live oak (Quercus w frutescens ), coffeeberry, madrone, chaparral pipestem (Clematis lasianoak, and birch-leaf mountain mahogany. Wildlife observed in this cominclude Hutton’s Vireo (Vireo huttoni ), Blue-gray Gnatcatcher (Polioptiand Fox Sparrow (Passerella iliaca ).

Poison oak scrub - Briefly described in Holland (1986), poison oak scrub

dominated community maintained by frequent fires or other distucompletely dominated by poison oak. Within the RPA Area, poisoncontains extremely dense, monotypic stands of poison oak to two meterare no other species associated with this community type. Wildlife obsecommunity type includes Ruby-crowned Kinglet (Regulus calendula ), WSan Francisco Dusky-footed Woodrat (Neotoma fuscipes annectens ).

Non-native annual grassland - Non-native annual grassland is describe

(1986) as a dense to sparse cover of annual grasses and herbs 0.2 to 0.5 Characteristic species include wild oats, soft chess (Bromus hordeac(Erodium botrys , E. cicutarium ), Italian ryegrass (Lolium multiflorum ), s(Vulpia microstachys ), and various native and non-native herbs and wildlcommunity type is distributed throughout the valleys and foothills California below 3,000 feet.

Non-native annual grassland was mapped within the RPA Area in varioupositions. Non-native annual grassland intergrades with chaparral

woodlands on slopes and ridgelines. Species typical of this community wild oats, ripgut brome (Bromus diandrus ), soft chess, Italian ryegrass, ffescue, California poppy (Eschscholzia californica ), bird vetch (Vicia cbirdfoot trefoil (Lotus corniculatus ). Wildlife observed in this plant commuWestern Meadowlark (Sturnella neglecta ), Bobcat (Lynx rufus ), and Swallow (Tachycineta thalassina ).

California bay forest - California bay forest is described in Holland (198

to a mixed evergreen forest but typically consisting entirely of Californmeters tall. It usually occurs on moist, north-facing slopes and interredwood forests in moister canyons and mixed chaparral on drier, roc

This community type is usually very dense and supports little or noCharacteristic species include jimbrush, dogwood (Cornus sp.), blackbesp.), and snowberry. It is distributed along the coast ranges from the Or



community include Stellar's Jay (Cyanocitta stelleri ), Chestnut-backed(Poecile rufescens ), and Mule Deer (Odocoileus hemionus ).

Reclaimed areas - Reclaimed areas are defined here as historically distuthat have been reclaimed by grading to a final contour, planted with species, and/or planted at a low to moderate density with native shrubincluding coyote brush, chamise, and oaks from locally collected cacorns. Irrigation has been applied to some of the more recent,revegetated areas to encourage the establishment of planted trees and protective cages have been installed around most container plantingdamage from deer browsing. Generally, these areas are dominated by g

including wild oats, brome grasses, small fescue, and Italian rye-grassestablishment of yellow star thistle throughout the open areas. Wildlifethis plant community include Grasshopper Sparrow (Ammodramus sBewick’s Wren, and Spotted Towhee.

Active quarry - Within the RPA Area, areas identified as active quarrdisturbed by quarry activities and in some locations host a very smal

weedy and/or native plant species including yellow star thistle, co

chamise, wild oats, sweet fennel (Foeniculum vulgare ), and field mustardplant cover in these areas is very sparse due to the lack of topsoil. Thisoffers little habitat for plants or animals.

Disturbed areas - Within the RPA Area, certain areas identified as disbeen recently disturbed by non-quarry activities such as plowing for fuelconstruction and maintenance of dirt roads and clearing of hiking trailsareas generally have highly compacted soils and provide little habitat fanimals.

Settling ponds and operational water features - Settling ponds for qand operational water ponds were identified within and adjacent to the identified in the Biological Resources Assessment.

Sensitive Communities

Willow riparian forest and scrub - Willow riparian forest and scrub is n

in Holland (1986), but is characterized as a riparian community dovarious willow species (Salix spp.). Species typical of this community arroyo willow (Salix lasiolepis ), red willow (S. laevigata ), and blackgooddinggii ). The overstory ranges from dense to open, and heights ranto six meters. Associated understory species include short spike hstinging nettle, poison oak, California blackberry (Rubus ursinus ), and w



RPA Area. Species characteristic of these oak woodland types inclu(Quercus douglasii ), coast live oak, canyon live oak, California buckey(Pinus sabiniana ), California bay, elderberry, toyon, madrone, coffeeb

oak, gooseberries (Ribes spp.), and manzanitas. These oak woodlandistributed throughout California typically in protected valleys and slopes, intergrading with chaparrals on drier sites and mixed evergreemoister sites.

Oak woodlands were mapped within the RPA Area primarily along slopes and in valley bottoms. Oak woodlands are predominantly charcoast live oak and blue oak woodlands. A few small pockets of oa

dominated by interior live oak (northern portion of the Permanente Propepresent. Oak woodlands within the Permanente Property have dense overstories containing madrone, tanbark oak (Lithocarpus densiflorus ), anbay with occasional grey pine, and douglas-fir (Pseudotsuga menziescharacteristic of the understory include poison oak, coffeeberry, o(Holodiscus discolor ), elderberry, toyon, and gooseberries. Wildlife obseplant includes Cooper's Hawk (Accipiter cooperii ), Oak Titmouse (Oak TitCalifornia Deer Mouse (Peromyscus californicus ).

Streams and ponds - Streams and ephemeral drainages were mappedRPA Area. The most significant of these is Permanente Creek, a perenthat flows adjacent to the RPA Area from its headwaters in the wnortheastern boundary of the site. Portions of the creek typically con

water for only a few weeks during annual peak rains. Tributaries toCreek as well as tributaries to Ohlone Creek to the north and to Monte Bethe south of the RPA Area were mapped and are described in detail in a judetermination report submitted to the U.S. Army Corps of Engineers 2010. A complete description of all vegetation communities and wildlon-site can be found in the Biological Resources Assessment (Attachment

Figure 2.6-1 Soil Types



2 1



Figure 2.9-1 Vegetation Communities





3.0 Reclamation Plan

3.1 Owner / Operator / Agent

Owner:Hanson Permanente Cement, Inc.300 E. John Carpenter Freeway #1645Las Colinas, TX 75062

Operator:Lehigh Southwest Cement Company

12667 Alcosta Blvd., Suite 400San Ramon, CA 94583

Site Contact:Henrik Wesseling, Plant Manager24001 Stevens Creek Blvd.Cupertino, CA 95014-5659

3.2 Operations Data

The Amendment incorporates approximately 811 acres (RPA Area) of3,510 acre ownership. Of this 811 acres, 593 acres represents escheduled mining and reclamation activities. Approximately 543 acres ocurrently disturbed; approximately 51 acres are scheduled for disturbthis Amendment. The remaining 217 acres of the RPA Area arundisturbed and will not be affected by this Amendment (Figure 1.0-6)identified above do not match due to rounding.

Mineral Commodity

The Quarry primarily produces limestone for cement production and carbonate limestone for construction aggregate uses. In this documentrefers to cement-grade limestone, and “aggregate” means other limestonegreenstone suitable for use in construction aggregate products. “Overbuto overburden and rock materials that are not suitable for use as l

aggregate.

Starting Date of Operations

The Quarry is currently active and has been in continuous operation sin1900s.



from the West Materials Storage Area and the production and disposal offrom the West Materials Storage Area to the North Quarry. Under thmining operations would cease in approximately 2025.

Total Anticipated Production

The total anticipated production of aggregate and limestone is estim45million tons.

3.3 Operational Characteristics

The RPA Area contains the following main components: the North QMaterials Storage Area (WMSA), East Materials Storage Area (EMSA)Support Area, Surge Pile, Rock Plant, and Buffer Zones. All of these compthe exception of the Buffer Zones are existing operational areas (Figure 3components are summarized by acreage in the following table and descridetail below.

Table 1. Quarry Components

Component AcreageNorth Quarry 265

West Materials Storage Area 173

East Materials Storage Area 74

Crusher and Support Area 53

Surge Pile 9

Rock Plant 19

Buffer Zones 217

Total RPA Area 811Note: Totals do not match due to rounding

North Quarry: The North Quarry is where mineral extraction currently The North Quarry will encompass approximately 265 acres at buildoutQuarry currently features elevations ranging from approximately 750 1,750 feet msl. Existing slope angles in the North Quarry are 1.0H:Under this Amendment, mineral extraction in the North Quarry will co

limited time, and thereafter the North Quarry will be backfilled wicurrently stored within the WMSA. This process will completely backfQuarry, and establish final elevations between 990 and 1,750 feet msl.

will create gentler slope angles at a maximum of 2.5H:1.0V that will consistent with the surrounding topography and which ensure longstability.



demand, the rate of overburden production, and other operational factslope angles in the EMSA reach a maximum gradient of 2.6(H):1.0(V). phases for the EMSA are shown in Figures 3.15-5 through 3.15-7.

reclamation landform is shown on Figure 3.15-9.

West Materials Storage Area (WMSA): The WMSA is an overburden located to the west of the North Quarry. The WMSA currentapproximately 140 acres with elevations ranging from approximately 1,5feet msl. The majority of overburden currently stored in the WMSA will bbackfill the North Quarry. This will eventually deplete most of toverburden stockpiles and return the area to a lower elevation.

overburden relocation process, valuable limestone and aggregate may out for processing. The ultimate landform for the WMSA will cover abou

with a maximum elevation of approximately 1,900 feet msl. Overall slothe WMSA reach a maximum gradient of 2.5(H):1.0(V).

Crusher and Support Area: The Crusher and Support Area is an e which contains primary and secondary crushing stations, Quarrymaintenance areas. The Crusher and Support Area is located to east

Quarry and to the west of the EMSA. This part of the Quarry totals approacres and serves as a general support area for ongoing operations. Appacres of the Crusher and Support Area will be incorporated into the Nunder this Amendment.

Surge Pile: The Surge Pile is an existing stockpile of crushed aggresoutheast of the North Quarry. The Surge Pile covers approximately 9holds aggregate materials pending further processing at the Rock Psoutheast. Material is transported from the Surge Pile to the Rock Plant

belts.

Rock Plant: The Rock Plant is an existing rock processing facility. Theis located to the southeast of the Surge Pile. The facility occupies approacres with gentle slopes ranging from approximately 580 to 770 feet msPlant is a collection of crushing, conveying, screening and washing faprocesses rock into an assortment of types and grades of aggregatAggregate products are stored in silos or stockpiles until picked up by

haul trucks.

Buffer Zones: The Amendment will maintain approximately 217 acrZones within the RPA Area. Buffer Zones are primarily undeveloped lacharacterized at the site mostly by steep hillsides and thick vegetation. Bfunction to protect the Quarry from land use encroachment, and als

Figure 3.3-1 Quarry Components



North

QuarryEMSA

WMSA

RockPlant

SurgePile

Buffer Zones

Crusher / Support

2 7

Figure 3.3-2 Mining Process



TOPSOIL REMOVAL

OVERBURDEN REMOVAL

CONVEYOR TO PLANT

PRIMARY CRUSHER

HAULTRUCK ANDLOADER

EXCAVATOR WI

DRIL

UNFINISHED SLOPE

2 8





3.6 Material Handling

Blasted rock will be loaded into off-road haul trucks by front-end loaders

and aggregate will be delivered to the primary crusher for crushing, thenconveyor belts to the Rock Plant or adjacent cement plant for furtherOverburden generated from North Quarry mining activities will be haEMSA or North Quarry west wall.

3.7 Material Processing

The processing of mined rock begins with its removal from active extra

Blasted rock is loaded into 100-ton or 150-ton off-road haul trucks bloaders. Aggregate and limestone are delivered to the primary crusher losoutheast of the North Quarry.

Once crushed, material is transported via belt conveyors to the Surge PiPlant, or to the adjacent cement plant, depending on whether the rock is aggregate (Figure 3.7-1). Material destined for the Rock Plant approximately 2,450 feet east (through a 550-foot tunnel) to a conveythen diverted south another 1,000 feet before discharging into the Material placed in the Surge Pile is fed through vibrating screens to a coand transported southeast approximately 2,750 feet to the Rock Plandestined for the cement plant follows the same initial path from the primto the conveyor junction, but is diverted before reaching the Surgealternative route into the adjacent cement plant.

Additionally, the WMSA is expected to contain pockets of valuable limaggregates materials, which will be mechanically screened out as th

excavated. These materials will be transported via conveyors or haul tRock Plant or adjacent cement plant for further processing as descrsection.

The Rock Plant occupies approximately 19 acres of the Quarry. Theconsists of equipment and facilities that screen, wash, sort and tempprocessed materials prior to distribution off-site. It also consists of tequipment as shown on Figure 3.7-2:

• Secondary and tertiary crushing units• Series of vibrating screens and rock washing units• Conveyors linking processing facilities with stockpiles• Finished material stockpiles• Imported sand stockpile



are enclosed and vented to particulate collection systems, known as badust control; water is sprayed at crushing units and conveyor transfcontrol dust.

The Rock Plant makes various sizes of aggregate products stored instockpiles. The Rock Plant imports a limited amount of sand that is bon-site sand to customer specifications. The Rock Plant does not includconcrete ready-mix facilities, nor are asphalt or concrete ready-mix faciliunder this Amendment.

Aggregate products are placed onto customer trucks utilizing front-end lo

positioning trucks underneath the Rock plant’s four storage silos via fuloading bins. Scales ensure that trucks are accurately loaded. Dmeasures, such as watering the aggregate materials, are employed wheloaders load aggregates directly to customer trucks from stockpiles.

All crushing, conveying and processing units currently operate accordinto Operate issued by the Bay Area Air Quality Management District Lehigh complies with all BAAQMD rules and regulations, including requthe control of fugitive dust. These requirements include the use of becontrol technology (BACT), which includes enclosures, water sprays, anto reduce or eliminate dust emissions.

3.8 Operational Water and Dust Control

Water is used at the Quarry for dust control, and for washing aggproducts at the Rock Plant. Water used at the Quarry comes from two City of Cupertino municipal source and from water stored in the bottom

Quarry.

The Rock Plant uses water obtained from the City of Cupertino processing and dust control. Approximately 90 percent of the procrecycled. Such water is collected after use and pumped to a clarifier lothe Rock Plant site. Solids settle and are periodically excavated and dispmaterial storage area. Cleaned water is then reused.

Water collected in the North Quarry is used for controlling dust on unproads. Watering intervals for dust control depend on weather congenerally occur multiple times per day. As the North Quarry is backfilledto hold water, a sump will be constructed within the North Quarry for and erosion control purposes (see Section 3.9). Water stored in this sused to support Quarry operations.

Figure 3.7-1 Quarry Conveyor Circuit



3 2

PrimaryCrusher

Surge Pile

Cement Plant

Secondary Crushing

NorthQuarry

Figure 3.7-2 Rock Plant Facilities



3 3

C o n v e y o r f r o m S u r g e P i l e

TunnelConveyor

MaintenaFacility/O

LoadoutSilos

Clar

ScaleHouse

P r o d u c t

S t o c k p i l e s

P r o

d u c

t

S t o

c k

p i l e

sSecondary Crushing

and Screening

S e c o

n d a r y C r u s h i n g

S c r e e n i

n g a n d W

a s h i n g



3.9 Storm Water and Erosion Control

Activities described in this Amendment are designed to control surfa

protect surrounding land and water resources in accordance with the PoWater Quality Control Act, the Federal Clean Water Act, and other appstate and federal requirements. These goals are achieved through a seManagement Practices (BMPs) pursuant to the Drainage Report (AttachmStorm Water Pollution Prevention Plan (SWPPP). Drainage and erosapply at all stages of operation and reclamation, and are designed to exc

year storm event. These are described in more detail in Section 3.17 belo

3.10 Process Fines

Processing activities at the Rock Plant will generate some process fines suitable for sale as aggregate products. These fines will be transported Quarry for permanent storage. Alternatively, process fines may be btopsoil and overburden to support the revegetation effort, as descrRevegetation Plan. Process fines have a clay loam texture and substantially greater amount of silt and clay compared to the overbBlending the Rock Plant fines material with the overburden rock imtexture conditions.

3.11 Site Security and Safety

Consistent with existing operations, Quarrying activities will continue t24 hours per day, 365 days per year under this Amendment.

Public health and safety are protected in accordance with SMARA and t

standards for undeveloped land. Lehigh’s property is located generally inarea with limited access. The steep slopes and rugged terrain limit the the public to trespass onto the property, which is privately owned, with tof the Mid-Peninsula Regional Open Space District (MPROSD) land to thmost areas, Buffer Zones and the Quarry Buffer provide appropriabetween mining activities and adjacent non-owned lands.

A guard house controls vehicular access to the site at the western

Stevens Creek Boulevard. Portions of the property boundary have beenthe MPROSD border where unauthorized access may be a problem. Elsrisk of unauthorized access is considered low and the property boundarie

with warning signs. Security fencing consists of 6-foot chain link fenciron and barbed wire. All MSHA standards will be employed to protepublic in general and onsite employees in particular.



3.12 Utilities

Existing utility services to the Quarry include water from the City o

electrical from Pacific Gas and Electric (PG&E), sewer and telecommMajor equipment, facilities and structures receiving electricity include:

• Primary crusher• Secondary crusher• Quarry conveyor• Rock Plant conveyor• WMSA Conveyor (not yet installed)

• Rock Plant (secondary and tertiary crushers, screens, conve• Quarry offices• Quarry lighting of certain access roads, conveyors and

facilities

Sewage generated from the Quarry offices, comprised of two portable traimmediately east of the North Quarry, is disposed into a septic systemtoilets are stationed throughout the Quarry as needed. The septic portable facilities are properly maintained and cleaned with hand-waprovided at each portable facility.

Current conditions find an inactive powerline and a gas pipeline crossingPrior to placement of overburden on these areas, the powerline will be

The existing natural gas pipeline may remain in-place or be rerouted to sefacilities. Any infrastructure supporting mining and reclamation activproperly dismantled or abandoned in-place once their functionality forQuarry has ended.

3.13 Off-Site Traffic

Existing mining activities at the Quarry generate off- and on-site traffictraffic occurs in one of the following categories:

• Customer haul trucks to Rock Plant• Quarry employees

• Deliveries of materials and supplies• Contractor visits• Reclamation work crews

Customer haul trucks visiting the Rock Plant utilize Stevens CreekFoothill Boulevard, Highway 280, and the Foothill Expressway. There





Revegetation of the North Quarry will generally occur in three phases, A, shown in Figure 3.15-11. North Quarry Phase A will include reclamupper elevations of the North Quarry northern and eastern faces, gener

between 990 and 1,460 feet msl. North Quarry Phase B will involve s1,300 feet msl. North Quarry Phase C will include the west face abovmsl, the North Quarry floor, the main haul road, and any other areasNorth Quarry that have not been reclaimed (see Figure 3.15-11).

West Materials Storage Area (WMSA)

The majority of overburden currently stored in the WMSA will be utilize

the North Quarry. This will deplete most of the WMSA's overburden streturn the area to a lower elevation. As part of the ultimate design, the of the WMSA will blend with the North Quarry, with final contoursnaturally occurring south-facing slopes in the vicinity of the Quarry.

The WMSA stockpile will be excavated progressively in a general north-nsouth-southeast direction. Final overall slope angles in the WMSA wil2.5(H):1.0(V).

In general, reclamation will consist of grading slopes to final contougrowth medium, installation of erosion control measures, reseeding aactivities, and maintenance and monitoring. Where mining activities hin the compaction of soil, ripping, discing or other means will be used tosuitable rooting zone in preparation for planting.

Reclamation will generally proceed in three phases, A, B and C as detail3.15-10. WMSA Phase A generally involves slopes above 1,750 feet m

Phase B consists of south-facing slopes between 1,650 and 1,750 feet Phase C includes south-facing slopes below 1,650 feet msl. After each arto final contours, revegetation will occur as described in the Revegetation

East Materials Storage Area (EMSA)

Reclamation in the EMSA is intended to establish final contours, nativand oak woodland habitats that are consistent the surrounding area and

EMSA reclamation also is designed to improve views by visually screeoperations from the surrounding community (see Section 3.16.3.2).

Final overall slope angles in the EMSA will not exceed 2.6H:1V (Fig These slopes will be comprised of 2H:1V inter-bench slopes, interrupte wide benches spaced at 40-foot vertical intervals. These slopes



removed from the site. Facilities located within the Crusher and Sinclude the primary crusher, secondary crushers and an equipment mfacility. A small amount of hazardous materials such as fuels, oils and o

fluids are stored at the equipment maintenance facility. Containers hmaterials will be transported off-site by an approved carrier per Statregulations. The Quarry offices are portable and will be removed from tabove ground fuel tank located adjacent to the Quarry offices will cleaned and tested per State and Local regulations prior to transporting approved carrier.

Reclamation will consist of finish grading, applying growth medium, in

erosion control measures, reseeding and planting activities, and maintmonitoring (Figure 3.15-12). Where mining activities have resucompaction of soil, ripping, discing or other means will be used to suitable rooting zone in preparation for planting. Revegetation will occur in the Revegetation Plan.

Surge Pile

The Surge Pile will be reclaimed by removing the stockpiled material and

approximately the natural topography (Figure 3.15-12). Materials stSurge Pile will be transported to the Rock Plant via conveyor belts or

These materials may also be transported directly off-site from theFollowing removal off all materials from the Surge Pile, structures includiscreens and conveyor belts will be dismantled and transported off-site

will be sold for salvage value or removed from the site.

Reclamation will consist of finish grading, applying growth medium, in

erosion control measures, reseeding and planting activities, and maintmonitoring. Where mining activities have resulted in the compaction of discing or other means will be used to establish a suitable rootipreparation for planting. Revegetation will occur as described in the Plan.

Rock Plant

Reclamation of the Rock Plant will involve the dismantling and dstructures as required. The scrap will be sold for salvage value or removsite. In addition to the processing plant structures, facilities located Plant include a light vehicle maintenance facility and truck tire wash faciamount of hazardous materials such as fuels, oils and other vehicle fluidat the light vehicle maintenance facility. Containers holding these mate



3.15 Reclamation Phasing

This Amendment adopts phasing schedules to ensure that reclamation b

earliest possible time after the conclusion of mining.

Activities described in this Amendment are scheduled to proceed in a tophases (Phases 1 through 3), shown in the table below. The actureclamation depends upon the rate of extraction and overburden storavariable. The dates provided are estimates and may change subjecdemand and the quality of resource encountered during the mining proce

Table 2. Phasing Timeline Phase Years Start Date End Date

Phase 1 9 2011 2020

Phase 2 5 2021 2025

Phase 3 5 2026 2030

Existing conditions are shown in Figure 3.15-1. The attached Recla

Exhibits include maps detailing the progression of development for the NoWMSA, and EMSA. These maps show conditions at the conclusion of eaa given area. Illustrations of this progression also are shown in Figthrough 3.15-4.)

Figures 3.15-8 through 3.15-13 illustrate how the final treatment of langrading, erosion controls, resoiling and revegetation) will progress frconditions to final reclamation. Mining and reclamation phases may oveand extent. Additional time periods may apply to each phase tmaintenance and monitoring of revegetation activities until the reclamatiostandards described below and in the Revegetation Plan are met.

The following discussion provides a general description of reclamation phrelate to mining phases and the anticipated beginning and ending dareclamation phase.

Phase 1

Phase 1 covers the time period beginning with approval of the Amenending when mining in the North Quarry concludes. The current estmining to continue in the North Quarry through at least 2020, alschedule is dependent on market demands and conditions in the field. Th t i d b th l d t f fi l l ti i t



allow for maintenance and monitoring of revegetation until the reclamatiostandards described below are met.

Because EMSA reclamation is scheduled to occur before mining conclNorth Quarry, overburden storage activities in this phase will transitiEMSA to the North Quarry west wall (Figure 3.15-2). During this phase, tarea will be backfilled to approximately 1,840 feet msl and will effectiv

western edge of the North Quarry with the eastern portions of the existing

Phase 2

Phase 2 will commence when North Quarry extraction is complete, anQuarry is able to accept backfill material available from the WMSA. WM will be placed within the North Quarry and tie into the west wall establiPhase 1. Materials will be keyed into slopes and rough-graded ageotechnical recommendations. The backfill in the North Quarry will raiof the North Quarry excavation from approximately 440 feet msl to 990 Figure 3.15-3).

Excavated WMSA material will be transported by either haul truck o

conveyor circuit. Generally, oversized material (12-inch plus) will be sepmobile heavy-duty static grizzly, then stockpiled and loaded into trucks fto the North Quarry. Minus 12-inch size material will drop onto a heafeeder that loads a series of portable conveyors. These conveyors wmaterial to the east to designated dump locations in the North Quarry foas backfill. Haul trucks will use the existing WMSA haul road to dematerial to the North Quarry (see Figure 3.15-3).

A certain amount of mining operations is anticipated to occur directWMSA stockpile as material is excavated and screened. Limestone anmaterials may be separated then transported via conveyors or haul trCrusher and Support Area for additional processing. These materials delivered to the Rock Plant or adjacent cement plant for further prdescribed in Section 3.7.

This phase generally includes North Quarry Reclamation Phase A. Recl

also be initiated for North Quarry Reclamation Phase B and WMSA Phases A and B.

Phase 3

Phase 3 includes final reclamation and will commence when the North



Final Reclamation

Final reclamation refers to the process of bringing areas in active recconclusion, according to the reclamation performance standards set Amendment (refer to Section 3.16). A complete description of reclamatican be found in Sections 3.14 through 3.16 of this Amendment and the Plan.

Figure 3.15-1 Existing Operations



Surge Pile

RockPlant

EMSANorth Quarry

WMSA

Crusher / Support

Figure 3.15-2 Mining and Reclamation Phase 1



1 3 2 0

1 2 3 0

1 3 3 0

1 8 1 0

185 0

9 9 0

1 4 3 0

1 7 3 0

1 7 3 0

1 2 3 0

1 0 3 0

1 0 4 0

8 9 0

640

840

6 4 0

1 9 0 0

19109 9 0

1975

1 8 5 0

890

1950

990

440

8 9 0

19 60

1 2 6 0

1950

19 0 0

1 9 0 0

1 0 6 01060

1900

1 1 6 0

1 9 5 0

1 7 5 0

1 7 1 0

1 8 4 0

1 5 3 0

1 4 3 0

6 4 0

8 4 0

900

7 3 0

870

EMSA

North QuarryMining

North QuarryWest Wall

WMSA

Figure 3.15-3 Mining and Reclamation Phase 2



1800

1700 1750

1 4 0 0

1060

1 2 0 0

1 3 0 0

1 4 0 0

1 2 0 0

16 5 0

1450

1 5 0 0

1 2 6 0

990

1 6 0 0

110 0

1 0 5 0

1850

1 0 0 0

1 2 3 0

1 3 2 0

1 9 0 0

1 1 6 0

1 8 5 0

990

1 0 6 0

1 3 0 0

1 5 5 0

1600

1000

1 6 5 0

1 7 0 0

1 8 0 0

1 7 0 0

1 6 0 0

1 3 0 0

1 5 0 0

1 5 5 0

1850

8 4 0

900

7 3 0

870

EMSA

North QuarryIn-Pit Fill


WMSA

Figure 3.15-4 Mining and Reclamation Phase 3 / Final Reclamation



6 1 0

1800

1700 1750

1 4 0 0

1060

1 2 0 0

1 3 0 0

1 4 0 0

1 2 0 0

16 5 0

1450

1 5 0 0

1 2 6 0

990

1 6 0 0

110 0

1 0 5 0

1850

1 0 0 0

6 5 0

1 2 3 0

1 3 2 0

7 6 0

8 5 0

1 9 0 0

7 0 0

1 1 6 0

1 8 5 0

990

1 0 6 0

1 3 0 0

1 5 5 0

1600

1 0 0 0

1000

1 6 5 0

1 7 0 0

1 8 0 0

1 7 0 0

1 6 0 0

1 3 0 0

1 5 0 0

1 5 5 0

1850

8 4 0

900

7 3 0

870

EMSA



WMSA

SurgePile

Figure 3.15-5 EMSA Phase A



8 8 0

8 4 0

900

8 4 0

TopsoilStockpile

Area

9 1 0

Figure 3.15-6 EMSA Phase B



6 4 0

8 8 0

8 4 0

6 0 0

7 8 0

900

7 3 0

8 2 0

8 4 0

TopsoilStockpile

Area

680

9 1 0

8 5 0

Figure 3.15-7 EMSA Phase C



6 4 0

6 8 0

7 2 0

8 8 0

7 6 0

8 4 0

6 0 0

7 8 0

8 3 0

8 1 0

900

8 1 0

7 3 0

870

8 2 0

8 4 0

8 5 0

7 6 0

7 2 0

8 0 0

9 1 0

8 5 0

Figure 3.15-8 Reclamation Phasing Overview



6 1 0

1800

1700 1750

1 4 0 0

1060

1 2 0 0

1 3 0 0

1 4 0 0

1 2 0 0

16 5 0

1450

1 5 0 0

1 2 6 0

990

1 6 0 0

110 0

1 0 5 0

1850

1 0 0 0

6 5 0

1 2 3 0

1 3 2 0

7 6 0

8 5 0

1 9 0 0

7 0 0

1 1 6 0

1 8 5 0

990

1 0 6 0

1 3 0 0

1 5 5 0

1600

1 0 0 0

1000

1 6 5 0

1 7 0 0

1 8 0 0

1 7 0 0

1 6 0 0

1 3 0 0

1 5 0 0

1 5 5 0

1850

8 4 0

900

7 3 0

870

EMSA



WMSA

SurgePile

RP

Figure 3.15-9 EMSA Reclamation Phases



6 4 0

6 8 0

7 2 0

8 8 0

7 6 0

8 4 0

6 0 0

7 8 0

8 3 0

8 0 0

9 0 0

8 1 0

7 3 0

8 7 0

8 5 0

8 2 0

8 4 0

8 4 0

7 6 0

7 2 0

8 0 0

9 1 0

1850

Figure 3.15-10 WMSA Reclamation Phases



1800

1700 1750

16 5 0

1 5 0 0

1850

1 9 0 0

1 8 5 0

1 3 0 0

1 5 5 0

16001 6 5 0

1 7 0 0

1 8 0 0

1 7 0 0

1 6 0 0

1 5 0 0

1

5 5 0

Figure 3.15-11 North Quarry Reclamation Phases



1750

1 4 0 0

1 2 0 0

1 3 0 0

1 4 0 0

1 2 0 0

16 5 0

1450

1 5 0 0

990

1 6 0 0

110 0

1 0 5 0

1850

1 0 0 0

1 2 3 0

1 3

990

1 0 6 0

1 3 0 0

1 5 5 0

00

1000

1 6 5 0

1 7 0 0

1 8 0 0

1 7 0 0

1 6 0 0

1 3 0 0

1 5 0 0

1 5 5 0

1 0 0 0

1 2 3 0

1 3 2 0

1 3 0 0

Figure 3.15-12 Final Reclamation: Crusher and Support Area, Surge Pile, and Rock Plant



6 1 0

1060

1 2 6 0

990

6 5 0

7 6 0

8 5 0

7 0 0

1 1 6 0

990

1 0 6 0

1 0 0 0

1000

Figure 3.15-13 Ultimate Reclaimed Condition



6 1 0

1800

1700 1750

1 4 0 0

1060

1 2 0 0

1 3 0 0

1 4 0 0

1 2 0 0

16 5 0

1450

1 5 0 0

1 2 6 0

990

1 6 0 0

110 0

1 0 5 0

1850

1 0 0 0

6 5 0

1 2 3 0

1 3 2 0

7 6 0

8 5 0

1 9 0 0

7 0 0

1 1 6 0

1 8 5 0

990

1 0 6 0

1 3 0 0

1 5 5 0

1600

1 0 0 0

1000

1 6 5 0

1 7 0 0

1 8 0 0

1 7 0 0

1 6 0 0

1 3 0 0

1 5 0 0

1 5 5 0

1850

8 4 0

900

7 3 0

870

EMSA



WMSA

Surge

Pile

3.16 Reclamation Standards



SMARA requires that reclamation plans incorporate verifiable standard

adequate completion of reclamation plan objectives. The verifiable standards have been adopted by the State Board of Mining and regulations to implement these requirements. (See Code of Regulatio3700 et seq.) The Amendment references these adopted reclamation stahow they are addressed. Specific reclamation standards that are not relAmendment are not referenced.

3.16.1 Wildlife Habitat (§3703)

Reclamation is intended to establish wildlife habitat in the RPA Area inthat is equal or superior to current conditions. Reclamation will occur vegetation representative of oak woodland, chaparral and grassland csimilar to naturally occurring conditions in proximity to the RPA Area 3.16.3.2). For north-facing slopes, the objective of revegetation is to estaand herbaceous species present in adjacent undisturbed communities, wof shrub and tree plantings on the benches that eventually will contrregeneration of scrub, woodland, and forest. For south-facing slopes, the

revegetation is to mimic the scrub communities present on south-facing sadjacent open space areas by seeding with native shrubs and grasseventually contribute to the establishment of scrub communities. Ncurrently exist in the RPA Area or will be affected by the activities descrAmendment.

The Amendment incorporates protective measures to avoid impacts to spavian species from mining and reclamation activities. These me

summarized below and described in greater detail in the BiologicaAssessment (Attachment D):

1. Non-breeding season: If nesting birds are encountered duringreclamation activities in the non-breeding season, defined as apSeptember 1 to January 31, activities within a minimum of 50 feet of be postponed. Activities within this area will remain halted untilabandoned or the young birds have fledged.

2. Breeding season: During the breeding season (approximately FeAugust 31), pre-activity surveys will be conducted by a qualified biologround disturbance activities. Surveys will be conducted for all suithabitat within 250 feet of potentially affected areas. All activepasserine nests identified will be protected by a 50-foot radiu

The Amendment also incorporates protective measures to avoid impactsb t Th d ib d i t d t il i th Bi l i



bats. These measures are described in greater detail in the BiologicaAssessment:

1. Non-roosting season (approximately September 1 to October evidence of roosting is observed within or immediately adjacent Area, activities will be halted within an appropriately-sized exclusbe determined by a qualified bat biologist.

2. Hibernation season (approximately November 1 to March 31): No atake place within 100 feet of identified hibernation areas, unlessbat biologist has determined that a given area does not prov

hibernating conditions and that bats are unlikely to be present in t

3. Maternity roosting season (approximately April 1 to August 31):surveys (night-time evening emergence surveys and/or internal sebe conducted within large tree cavities to determine the presmaternity roosts within areas identified in the BiologicalAssessment. All active roosts identified during surveys will be proappropriately-sized buffer to be determined by a qualified bat bi

buffer will be determined by the type of bat observed, topograaspect, surrounding vegetation, sensitivity of roost, type odisturbance, etc. Each exclusion zone would remain in place untthe maternity roosting season. If no active roosts are identified thmay commence as planned. Survey results are valid for 30 dasurvey date. Should work commence later than 30 days from the surveys should be repeated.

The Amendment also incorporates protective measures to avoid impactFrancisco Dusky-footed Woodrat. These measures are described in greathe Biological Resources Assessment:

1. Active woodrat houses should be flagged and avoided when pavoidance is not feasible, the houses shall be dismantled by hansupervision of a biologist. If young are encountered during the process, the material will be placed back on the house and theremain unmolested for two to three weeks in order to give the yo

time to mature and leave the house on their own accord. After weeks, the nest dismantling process may begin again. Nest mamoved to suitable adjacent areas (oak woodland, scrub, or chaparnot be disturbed.

Final overall reclaimed slopes will not exceed 2.5H:1.0V in all areas, andetermined to be stable under static and seismic loading conditions and



determined to be stable under static and seismic loading conditions and for the end use. Final overall slope angles in the WMSA will not exceed 2

The North Quarry will be reclaimed to maximum slope angles of 2.5(H):1Fill slopes in the EMSA will be reclaimed at a maximum overall slope in2.6H:1V. All final reclaimed slopes will have a minimum factor of safetyto the planned end use as described in the Geotechnical Report.

Reclaimed slopes will conform to the surrounding hillside topogrtopography in the RPA Area and surrounding area is variable but consistelevation in the east to west direction. Based on existing conditions, fill sfinal landform will be predominantly located within the EMSA and the No

with both cut and fill slopes in the WMSA. Current elevations within trange from approximately 500 feet to 2,000 feet msl. Reclaimed slgenerally consistent with the natural contours. Figure 3.15-4 and Figthrough 3.15-13 show the reclaimed elevations.

Reclaimed fill slopes will occur over an appropriate foundation pursrecommendations within the Geotechnical Report. Any refuse in the RPAcollected in approved trash bins and hauled to the nearest approved

disposal. Equipment and materials will be dismantled, if necessary, and alternate onsite or offsite location.

3.16.3 Revegetation (§3705), Topsoil Salvage, Mand Redistribution (§3711)

The planned end use for the RPA Area is open space. As a result, the ufor revegetation efforts is restoration of self-sustaining native

communities, and visual integration of reclaimed lands with surroundingareas. Revegetation will be sufficient to stabilize the surface against thlong-term erosion and is designed to meet the post-extractive land use RPA Area. Interim erosion control planting may be used to providprotection for disturbed areas until such time that they may be reclaapproved end use.

Revegetation efforts will emphasize plant materials capable of self- without continued dependence on irrigation, soil amendments, or

accordance with the Reclamation Standards. Hydroseeding of the fini with a mixture of native grasses, herbaceous plants, and shrubs will procover and erosion control for the new slopes. Tree and shrub planting alocated on contoured benches and riparian drainages to encourage thdevelopment of an oak savannah or forest on north-facing slopes, nati

very slow growing, native grey pine will be planted in some more visible bthese visible bench areas also favor grey pine as a hardier and faster-gro



these visible bench areas also favor grey pine as a hardier and faster grodue to solar exposure that is not optimal for oak tree establishment.

For south-facing slopes, the objective of revegetation is to mimiccommunities present on south-facing slopes in the adjacent open spaseeding with native shrubs and grasses that will eventually contribestablishment of scrub communities. Small portions of the RPA Area constructing channels that connect ephemeral drainages with receiv

These areas may be reclaimed using native riparian species where channcan support these species.

A complete discussion of these activities is contained in the attached RPlan (Attachment B). The Revegetation Plan also describes the test pl

which has been providing and continues to provide valuable informationused to inform revegetation efforts and performance standards for the mand monitoring of revegetation. Sections 3.16.3.1 through 3.16.3.5 surevegetation process.

3.16.3.1 Soil Development and Topsoil Salvage

Areas to be reclaimed in the RPA Area include cut slopes consisting bedrock and fill slopes consisting primarily of overburden rock, which doan ideal substrate for vegetation growth. Topsoil blends and potentialmaterials will be added to the overburden rock surface to improve thetexture, structure, and nutrient availability and to promote faster soil dev

To provide information on soil conditions for the soil development prog

soil samples were collected. The soil samples included a representative soverburden rock which will be the underlying substrate throughout the R well as samples from twenty-five undisturbed reference sites, threvegetation sites, and five potential supplemental material sources.

Soil development measures are based on soil samples collected from thand other locations in the Quarry. Samples were subjected to laboratoryassess the following characteristics: pH, Total Exchangeable CationSodium content, Sulfate content, Sodium Adsorption Ratio (SAR) Va

macronutrients (Nitrogen, Phosphate, Potassium, Calcium, MagnesiuMicronutrients (Iron, Manganese, Copper, Zinc), United States DepAgriculture (USDA) Soil Textural Classifications, and Organic Mat(Percent Dry Weight). The Amendment incorporates the recommendatiothe Revegetation Plan for achieving soil characteristics (soil texture, org

While the margins of stockpiled soil may need to be compacted for stabgeneral harvested topsoil will be compacted as little as possible and



general harvested topsoil will be compacted as little as possible and moved or worked when it is dry. Stockpiles of topsoil or other growintended for use in revegetation efforts will be protected from erosioestablishment through the use of hydroseeding with a native erosion contackifiers, mulches, erosion control blankets, wattles, silt fences, oprotection measures. Prior to topsoil harvest, the RPA Area will be clearvegetation and root balls using chainsaws and an excavator. Plant dchipped in place and spread on the topsoil, so that this organic matte

with the topsoil during harvest.

Soil preparation will occur by mixing salvaged topsoil blended with

material and other materials available onsite as detailed in the Revege The ratio of salvaged topsoil, overburden material, and other materials ingrowth medium will be dependent on the area to be revegetated. Likewisto which growth medium is applied will be dependent on the area to be Different soil treatments may be used for the various portions of thedepending on the target plant community and solar exposures. description of soil development and topsoil salvage methods can be fRevegetation Plan.

Soil preparation also involves preparing the surface for revegetation activmining activities have resulted in compaction of the soil, ripping, discimeans will be used in revegetation areas to establish a suitable rootpreparation for planting. Where access roads, haul roads, or other traffito be revegetated, all road-base materials shall be stripped from thsubstrate shall be ripped or disced as needed to promote establishappropriate root zone, a soil mix containing topsoil or compost will bpromote plant growth, and the area will be revegetated.

3.16.3.2 Replanting and Reseeding

This section describes plant installation planned for the RPA, wrevegetation area of approximately 593 acres. Revegetation will focus othe RPA to a native plant-dominated habitat similar to surrounding naRevegetation efforts will be implemented in stages following completion oof overburden placement and soil preparation. Planting and mainten

conducted using an adaptive management approach, based on revegetatithat were initiated in 2008. A preliminary erosion control stage may be prior to the revegetation tasks listed below, to allow for specific site plans to be developed based on the most current test plot results. Themix shown in Table 3 includes species that have proven successf

Table 3. Erosion Control Seed Mix



SCIENTIFIC NAME COMMON NAME PURE LIV

(lb / aBromus carinatus California brome 16.0

Elymus glaucus blue wildrye 10.0

Lupinus nanus sky lupine 5.0

Nassella pulchra purple needlegrass 8.0

Plantago erecta California plantain 3.0

Trifolium willdenovii tomcat clover 3.0

Vulpia microstachys three weeks fescue 8.0

TOTAL 53.0

Appendix B of the Revegetation Plan provides an extensive list of naobserved in undisturbed portions of the Quarry property, which may previously been used in revegetation planting or seeding at the Quarryavailability, lead time needed for nursery production, and results of te

help to refine this list. The majority of seed and container plants usedplots and in the reclamation revegetation effort will come from on-site date seed has been collected on-site, contract grown by local seed growiand the resulting seeds used for revegetation efforts. When onsite seed onot available, local sources are used with an attempt to obtain the mospossible. Onsite and local stock is adapted to the specific microclimateand reduces genetic mixing with nearby natural vegetation. The generevegetation is to establish grasses, forbs, and shrubs on slopes with trecontainer plantings installed in deeper soils on the benches (see RevegFigure 4). The cooler north and east facing benches will support the mtree plantings while some of the south facing benches will contain greycan tolerate more extreme conditions.

Hydroseeding

In the RPA, contoured surfaces will be covered with native grass, herbspecies via hydroseeding a homogenous slurry of mulch, fertilizer, s

binding agent over the areas to be revegetated. Drainage ditches and a will be left bare until the completion of the contouring and slope hydr which time unneeded roads will be revegetated. Local seed suppliers haappropriate native seed mixes for reclamation and are testing several mtest plots (see Revegetation Plan Section 5.0). A preliminary hydroseed m

Table 4. Preliminary Species for General Hydroseeding



SCIENTIFIC NAME COMMON NAME

PURE LIVE

SEED (lb / acre)

BU

(

SHRUBS

Artemisia californica Californiasagebrush

1.4

Baccharis pilularis coyote brush 0.2

Eriogonum fasciculatum California

buckwheat 1.0

Salvia leucophylla purple sage 0.7

Salvia mellifera black sage 1.1

GRASSES AND HERBS

Achillea millefolium yarrow 1.7

Artemisia douglasiana mugwort 0.1

Bromus carinatus California brome 4.6 Elymus glaucus blue wildrye 4.6

Eschscholzia californica California poppy 1.2

Heterotheca grandiflora telegraph weed 0.2

Lotus purshianus Spanish clover 0.7

Lotus scoparius deerweed 1.5

Lupinus nanus sky lupine 0.8

Melica californica California melic 1.3

Nassella pulchra purpleneedlegrass

2.9

Poa secunda one-sidedbluegrass

1.3

Trifolium willdenovii tomcat clover 1.4

Total 26.7

Tree and Shrub Plantings



Trees and shrubs will be planted as container plants or seeds in the areas. Tree and shrub container plantings will occur on the benches whlayer of topsoil and/or soil-building materials is applied to ensure adequaroot development. To the extent feasible, trees and shrubs to be plaobtained from seeds collected from the Quarry property or from loApproximately 50 acres of the total revegetation area will be planted as shrub container planting areas (see Revegetation Plan Figure 4). Shplanted at approximately 4.5-foot spacing and trees at 9-foot spadesignated planting areas. The remaining slopes and benches will be cshallower topsoil and/or soil-building materials and hydroseed

grass/herb/shrub seed mix, without containerized tree and shrub plantin

The north-facing benches can support a wider variety of tree and shrub sthey have less solar radiation and higher soil moisture (see Revegetation2). These north-facing benches will be revegetated with approximately oak-dominated plantings along with hydroseed. A target quantity of ap1,745 oak trees is scheduled to be planted in these areas, in addition to tree species. The oaks will be a mixture of acorn and container plant

facing benches normally support some oak woodland habitat but given conditions with no shade and intense solar radiation, planted oaks woulhigh mortality in these areas. Therefore approximately 21.5 acres of east-facing benches will be planted with 75 percent (approximately 8,66(Pinus sabiniana ), a native tree species that is tolerant of drier conditions25 percent other native tree and shrub plantings common to oak woodla

The grey pines will establish more readily than oak seedlings in the harsher conditions on the south-facing benches. As the pines develprovide a protected microclimate that will support oak woodland establidevelopment that should occur over time through natural recruitmsuccessional approach will facilitate more rapid woodland revegetation invisible areas while allowing eventual oak woodland establishment.

The need for herbivory protection for specific species will be evaluated bresults of test plots and early stages of the proposed reclamation project.or several inches of mulch may be placed around planted trees and shrucompetition and retain moisture. The benefit of mulch applications a

being tested in the test plot program.

The Revegetation Plan is designed to provide appropriate conditions for nso that they are not dependent upon irrigation. The need for irrigation destablishment will be assessed during the test plot monitoring an

As with hydroseeding, adaptive management will be used to determineand shrub species will be planted, the most effective spacing and lo

i i l l i if A li i li



species to use in replacement plantings if necessary. A preliminary list shrubs to be planted on benches of the RPA is provided in Table 5. Specand numbers will depend on propagule collection and availability, as weplot results.

Table 5. Preliminary Trees and Shrubs for Planting on RPA Be


TREES (may use acorns instead of container planting for some oaks)

Arbutus menziesii Pacific madrone

Pinus sabiniana grey pine

Quercus agrifolia coast live oak

Quercus chrysolepis canyon live oak

Quercus douglasii blue oak

Quercus lobata Valley oak

Quercus wislizenii interior live oak

SHRUBS*

Cercocarpus betuloides mountain mahogany

Heteromeles arbutifolia Toyon

Quercus berberidifolia scrub oak

Rhamnus californica California coffeeberry

Rhamnus crocea Redberry

Ribes californicum hillside gooseberry

Ribes malvaceum chaparral currant

* Shrub species selection may change based on the success of seededtest plots. If seed germination and establishment success of some shrupoor in the test plots, these shrub species may be tested as container pla

Riparian Revegetation

The RPA reclamation design includes created drainage channels and deteto carry and temporarily store stormwater runoff Some of these featur

The riparian areas with sufficient hydrology to support riparian habitlikely be along the reclaimed North Quarry floor. The total area that mi i i i d d t th h d l f th l i d



riparian species is dependent on the hydrology of the reclaimed areas wdetermined once final contours have been constructed.

Table 6. Preliminary Species for Planting AlongEphemeral Drainages and Detention Basins


TREES

Aesculus californica California buckeye

Quercus agrifolia coast live oak

Quercus chrysolepis canyon live oak

Quercus lobata Valley oak

Quercus wislizenii interior live oak

Salix laevigata red willow

Salix lasiolepis arroyo willow

SHRUBS

Heteromeles arbutifolia Toyon

Rhamnus californica California coffeeberry

Rosa californica California rose

Sambucus mexicana blue elderberry

GRASSES AND HERBS

Artemisia douglasiana mugwort

Carex barbarae valley sedge

Carex praegracilis field sedge

Cyperus eragrostis tall flatsedge

Hordeum brachyantherum meadow barley

Juncus effusus bog rush

Juncus patens common rush

Leymus triticoides creeping wildrye

3.16.3.3 Test Plot Program

A test plot program has been established in different locations of the



A test plot program has been established in different locations of the determine appropriate materials and techniques to improve revegetatthroughout areas to be reclaimed. A summary of the test plot program in the Revegtation Plan. The specific objectives of the test plots are toresponse of native seed mixes and container tree and shrub plantings toblends and depths.

Sixteen test plots were constructed on top of bare graded overburden locations in the fall of 2008. Plots 1-12 and 16 were constructed at the r"Yeager Yard" site, and plots 13-15 were constructed at a sloped location

EMSA (See Revegetation Plan Figure 5). To test the response of the seeplantings to various soil treatments, the test plots each differ by soil comdepth of soil. The soil treatments consisted of a combination of materiaoverburden rock, North Quarry fine greenstone material, rock plantimported compost. Each test plot was divided into four equal quadrantsfour different native seed mixes were applied, followed by straw mhydroslurry of fertilizers and a tackifier. In addition, container plainstalled in the 24-inch depth test plots (11, 12, and 16) in November 200

Test plots 13, 14, and 15 are located within the EMSA and are temporar They will provide useful results on germination and productivity on the slopes of the EMSA. They will be dismantled after collecting one to two yas they are in within the EMSA. The thirteen remaining test plots will bannually for five years to assess species success on the various soil typplant issues, the success of the mychorrhizal inoculant, herbivory levneed for irrigation. Results of the test plot monitoring will be used to fthe phased reclamation efforts.

3.16.3.4 Maintenance

Maintenance of revegetation areas shall consist of reseeding orunsuccessful revegetation efforts, weed control to limit the extent of noxand repair of erosion damage. If any significant rills or gullies are idenRPA, remedial actions will include reseeding of the area with an approcontrol seed mix, and if necessary, slope stabilization measures will be un

If revegetation efforts are not successful with regard to the performancidentified in the Revegetation Plan within five years following initial sunder-performing areas will be reevaluated to determine the measures nimprove performance. If necessary, these areas will be reseeded and/

Weed control is necessary to reduce the occurrence of undesirable non-nof plants that may invade the RPA where disturbance has removed the cover and where active and natural revegetation is taking place Weeds



cover and where active and natural revegetation is taking place. Weeds and usually invasive, species) can compete with native plant species moisture and nutrients and consequently interfere with revegetatHowever, many weeds are common in both the surrounding active adjacent natural open space lands.

As described in the Revegetation Plan, species listed by Cal-IPC (200invasive will be considered problematic and will be targeted during mathis revegetation effort if they exceed the designated threshold of ten peInvasive plant species typically found in the RPA and in surrounding la

yellow star thistle (Centaurea solstitialis , annual), black mustard (Braannual), stinkwort (Dittrichia graveolens , annual), pampas grass (Cortperennial), and fennel (Foeniculum vulgare , perennial).

Weed control methods may include chemical and mechanical removaldepending on the species and number of individuals encountered. Priorabatement should focus on those species listed as highly invasive, inother weeds that directly threaten the successful establishment and

native species. The percent cover of weeds, abatement measures recomundertaken, and other observations on weed control will be included imonitoring reports. Weed abatement responsibilities may cease once standards have been met for each phase of revegetation efforts, unlspecies in completed revegetation areas are deemed a threat to nearby eprogress.

3.16.3.5 Monitoring

Installation Monitoring

To ensure adherence to the guidelines of this revegetation plan, all impactivities will be monitored by a qualified individual. Records will be building treatments applied, addition of soil amendments as determnecessary, and all plant and seed installation. Hydroseed records identification of the date of application and a description and map of

where various seed mixes are applied. Additionally, installation of tre

plantings will be documented to identify the location and approximate aand the number of trees or shrubs planted or seeded.

Vegetation Monitoring



Reference site data were used to create a science-based and achievperformance standards (Table 7). Native species richness targets have b



p ( ) p gto reflect data collected from the reference sites and preliminary test

These densities and percent cover values reflect the expected growth shrubs in the first five years of the revegetation areas.

Reference data values for percent cover and density of trees and shrumature woody communities that have not seen significant disturbance While the target plant communities of the revegetation areas should even

with these mature communities, they cannot be expected to achcharacteristics over only five years of growth. Instead, shrub and tree pl

are designed to mimic pioneering plant communities that will continuand dominate the benches and slopes over several decades through treenatural regeneration.

Table 7. Five-Year Performance Standards for RPA Revegetat

Oak Woodland (north- and

northeast-facing benches)

Pine Woodland(east-facing

benches)

HydroseedAreas

shrub/grassland mix

Rip

WoodyPlants

Herbs WoodyPlants

Herbs WoodyPlants

Herbs WooPla

Richness (avg.native species per plot)**

5 3 4 3 3* 3* 4

Density (avg.native individuals per acre)

470 - 345 - - - 47

Canopy Cover 40% 40% 40%*

* Performance standards for hydroseed areas may need to be adjustefeasible five-year results of the species mix ultimately selected based results and early revegetation efforts during the reclamation period. In

the balance between shrub and herbaceous species cover may vary. ** Richness standards are based on plot sizes used in reference data codescribed in this Plan: 10m-radius plots for trees, 5m-radius plots for s1m-radius plots for herbs/grasses.

Performance Standards for Weed Control

In addition to vegetation monitoring to assess the success of revegetation



g g gdensity of weeds (non-native invasive plants) will be assessed as part o

sampling described in the Revegetation Plan.

Reference plots were surveyed in undisturbed natural grassland habadjacent to the Quarry property to assess native and non-native species rcover. The reference plots contained 28 species, 13 of which were non-naadditional 8 are listed invasive species in the California Invasive Plant CoIPC) Inventory (Cal-IPC 2006). Although two of the seven native species rthe highest cover, the next ten species with the highest cover were n

invasive species. Non-native and invasive species accounted for over 5the vegetative cover. Therefore performance standards were developed thinformation into account.

For the purposes of RPA maintenance and monitoring, non-native noplants listed in the Cal-IPC Inventory (2006) as highly invasive will beinvasive weeds subject to control and performance standards. If invasivfound to exceed a combined 5 percent relative cover over all sampled qua

abatement activities will commence. The following species should be subject to this performance standard: yellow star thistle (Centaureaannual), black mustard (Brassica nigra , annual), stinkwort (Dittrichiaannual), pampas grass (Cortaderia spp., perennial), and fennel (Foenicuperennial). Some of these species are only listed as moderately invasivebut they should be managed promptly because they are currently presnumbers in the RPA and will impede establishment of native cover.

Adaptive Management

The operators responsible for revegetation efforts to date in the RPA have success with adaptive strategies. The strategy described above may proefficient than other strategies developed at a later date. Therefore, iplanting strategy is implemented in the RPA in which the above standards and monitoring guidelines cannot be followed, a revisrevegetation plan will be submitted as a substitute for this document thereof.

3.17 Drainage, Diversion Structures, Waterways and Erosi(§3706), and Stream Protection, Including SuGroundwater (§3710)

detention and sediment control over the property. Basins are maintaineto the site’s SWPPP and applicable NPDES permits. The table below listsand planned sedimentation basins.



Table 8. Sedimentation Basins

Basin Description/Location

Existing Basins

4A Southern portion of the site, near former rocadjacent to creek access road

4B Southern portion of site, east of Pond 4A

4C Southern portion of site, east of Pond 4B

5 Located in North QuarryBasin E(formerly Pond 6)

Adjacent to Primary Crusher

9 North of Screen Tower 4 (Rock Plant)

11 Main cement plant area

13 Central portion of site, south of Pond 13A and Pond

13A Central portion of site, north of Pond 13 and 13B

13B Central portion of site, north of Pond 13 and sou

13A14 Northeast corner of site, north of Pond 22

Dinky ShedBasin (formerlyPond 16)

North of Pond 17

17 Southeast portion of site, northeast of Screen TowPlant)

18 East of cement plant, near rail spur

19 East of cement plant, near rail spur20 East of cement plant, near rail spur

21 East of cement plant, near rail spur

22 Northeast corner of site, south of Pond 14

30A Final basin at toe of EMSA

30B Eastern slope north of 30A

30C Northern slope west of 30B

30D Northern slope west of 30C

30E Northern slope west of 30D31B Southern slope southwest of 30A

31C Southern slope west of 31B

Planned Future Basins

40A North Quarry final floor

will direct storm flows the North Quarry floor, and stormwater will bePermanente Creek via an engineered drainage channel.



In the WMSA, two additional basins will be built, together with

downdrains on the WMSA’s south slopes for stormwater and erospurposes. Best Management Practices (BMPs) will collect and deliver the primary haul road and into the North Quarry. As Phase 2 progresWMSA haul road is incorporated into the ultimate design, additional Bimplemented as needed to control stormwater and erosion within Stormwater management in the North Quarry is described above.

In the EMSA, runoff will be directed longitudinally by intra-bench d

perimeter series of ditches and routed through swales and downdrains of seven downgradient basins serving the EMSA. Sedimentation basfencing will be installed as detailed in the Drainage Report (Attachmencontrols will route flows to a final basin located at the toe of the EMSA, are delivered to an existing drainage to Permanente Creek. Because poditches within the perimeter road and the downdrains will have a stethey will be lined with riprap or other erosion-resistant material to prevPermanent erosion control measures include the drainage ditches and

described above, and long-term revegetation as described in Section 3.16

Quarry-related basins will be maintained until areas of disturbance aresufficiently to provide for self-sustained erosion control. Basins will theto naturally reclaim over a period of years by allowing basins to accumulaand vegetation. Within the EMSA, desiltation basins will be removed, and revegetated when no longer needed for sediment control destablishment of vegetative cover. The basin at the bottom of the Northbe actively revegetated with wetlands vegetation to serve as eventual wet

as described in Sections 3.14 through 3.16 of this Amendment and the RPlan.

In addition to the measures described above, other temporary eromeasures will be used in the RPA Area during the course of mining and activities and immediately following reclamation. These measures wcontrol of sediment and include desiltation basins, drainage ditches, dsilt fencing, and hydroseeding. Other temporary erosion control measu

used if determined to be effective. Temporary erosion control measremoved, recontoured, and/or revegetated when no longer needed fcontrol due to the establishment of vegetative cover. These temporary eromeasures will be installed within the RPA Area as described in the Drainthe SWPPP, and the Revegetation Plan.

Maintenance and monitoring will include identification and repair of erosRemedial measures will be applied as identified below and in the DrainPerformance criteria and slope treatment for erosion control are ba

lit ti d i ti d di l d ib d i T bl 9



qualitative descriptions and remedial measures described in Tables 9 an

Field investigation will determine the need for remedial measures baseobservations. In general, areas receiving an average score of Class 3receive slope treatment. Any observable reason for failure will be noappropriate remedial measure stated as part of the annual monitoring rep

Table 9. Qualitative Descriptions of Soil Surface Status

CLASS 1: No soil loss or erosion; topsoil layer intact; wel

accumulation of litter from past year's growth plus smaller aolder litter.

CLASS 2: Soil movement slight and difficult to recognize; small deposiin form of fans or cones at end of small gullies or fills, or asaccumulations back of plant crowns or behind litter; litter ndispersed or no accumulation from past year's growth obvio

CLASS 3: Soil movement or loss more noticeable; topsoil loss evident,plants on pedestals or in hummocks; rill marks evide

dispersed litter and bare spots not protected by litter. CLASS 4: Soil movement and loss readily recognizable; topsoil rem

vertical sides and exposed plant roots; roots frequently expin relatively small amounts and washed into erosionpatches.

CLASS 5: Advanced erosion; active gullies, steep sidewalls on active gudeveloped erosion pavement on gravelly soils, litter mosaway.

Table 10. Remedial Measures for Erosion Control

CLASS 1: No action necessary. CLASS 2: Monitor to see if any further deterioration and action is requ

CLASS 3: Any rills or gullies in excess of 8 square inches in cross secand more than 10 linear feet located on finished slope

arrested using straw mulch or the equivalent. CLASS 4: Replant and cover with straw mulch and install silt

necessary, regrade and compact with equipment. CLASS 5: Replant and cover with straw mulch and install silt

necessary, regrade and compact with equipment.

3.18 Building, Structure and Equipment Removal (§3709)

With the exception of equipment required for reclamation purposes, aland structures will be removed from the RPA Area during final reclam



and structures will be removed from the RPA Area during final reclam

includes all rolling stock such as loaders, dozers, excavators, haul truvans and water trucks. This also includes all buildings and facilitconveyors, crushers, trailers, maintenance buildings, storage sheds andof structures. All surplus equipment and supplies stored within the Q

will be transported off-site. Any junk equipment left on-site will bnecessary, and disposed of for salvage value. All trash and miscellaneoube collected and hauled to an appropriate waste disposal facility pursstate and local health and safety ordinances. Suitable access roads wi

allow for proper monitoring and maintenance of the reclamation effort.

3.19 Public Health and Safety (§2712(c))

Post-extraction public health and safety will be protected in accordance standards for undeveloped land. During operations in the RPA Area, p

will be controlled in the following manner:

Access restricted to the Quarry 24 hours per day through a gatmanned by security guards.

Prior to encountering the guard gate on Permanente Road, there aleading toward the RPA Area. Access provided by these roads through locked gates.

Steep slopes and dense vegetation prevent access to the RPA Arealands.

Maintenance of fencing installed on portions of the property boununauthorized access may be a problem

Following final reclamation of the RPA Area, public access will be contfollowing manner:

Access roads will be blocked with a gate, large rocks or omechanism that will prohibit vehicular entry.

Signs will be posted at key locations around the perimeter of thadjacent to undeveloped lands. These signs will warn “Private Pr

Trespassing”, and “Danger: Steep Slopes”. All final slopes will be certified by a geotechnical engineer to be sui

planned end use.

3 20 Effect of Reclamation on Future Recovery of Mineral Re



Lehigh Reclamation Plan Amendment

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